# INSTR'20

Asia/Novosibirsk
Budker Institute of Nuclear Physics

#### Budker Institute of Nuclear Physics

11, akademika Lavrentieva prospect, Novosibirsk, Russia
Description

The International Conference "Instrumentation for Colliding Beam Physics" (INSTR-20) will be cohosted by the Budker Institute of Nuclear Physics (BINP) and Novosibirsk State University (NSU), Novosibirsk, Russia, from 24 to 28 February, 2020. This conference is in close relationship with those held in Vienna (VCI or Vienna Conference on Instrumentation) and on Elba (PM or Pisa Meeting on Advanced Detectors). The conference covers novel methods of particle detection used in various experiments at particle colliders and other accelerators as well as in astrophysics.

Scientific Programme
The aim of the Conference is to review the status and progress in instrumentation for experiments at colliding beams and related fields. The main topics include:

• Colliders and detector integration
• Tracking and vertex detectors
• Timing detectors
• Micropattern gas detectors
• Particle identification
• Calorimetry
• Instrumentation for Astroparticle and Neutrino physics
• Electronics, Trigger and Data Acquisition
• Computing and software in high energy physics
Participants
• Ahmed Ali
• Aleksandr KOROL
• Aleksandr Pakhorukov
• Aleksandr Popov
• Aleksandr Solovev
• Aleksei Kozyrev
• Aleksey Lemzyakov
• Alessandro Cardini
• Alessandro Miccoli
• Alexander Barnyakov
• Alexander Bondar
• Alexander Ivashkin
• Alexander Kumpan
• Alexander Kuzmin
• Alexander Ruban
• Alexandr Korobov
• Alexandr Selyunin
• Alexey Boldyrev
• Alexey Buzulutskov
• Alexey Garmash
• Alexey Onuchin
• AMARTYA THAKUR
• Anastasios Belias
• Anatoly Kashchuk
• Anatoly VOROBIOV
• Andreas Mussgiller
• Andrey KALNITSKIY
• Andrey Prokopenko
• Andrey Sokolov
• André Massafferri Rodrigues
• Anna Ivanova
• AnShun Zhou
• Anton Gorkovenko
• Anton Poluektov
• Anton Shalygin
• Antonios Papanestis
• Arturo Rodriguez
• Arun Vaidyanathan
• Bakhtiyar Iskakov
• Benoit Lefebvre
• Boris Shwartz
• ByungGu Cheon
• Carmen Garcia Ruiz
• Carsten Schwarz
• Chi Yang
• Chrysostomos Valderanis
• César Jesús-Valls
• Dae Yeon Kim
• Danilo Domenici
• Danyang Zhu
• Daojin Hong
• Denis Epifanov
• Dennis Pudzha
• Devin Mahon
• Dmitrii Ilin
• Dmitriy Maximov
• Dmitry Akimov
• Dmitry Chernov
• Dmitry Finogeev
• Dmitry Matvienko
• Eckhard ELSEN
• Egor Frolov
• Ekaterina Prokhorova
• Elena Kulish
• Etienne FORTIN
• Evgeniy Kravchenko
• Evgeniy Pyata
• Evgeny Shulga
• Evgeny Solodov
• Federica Cuna
• Fedor Ignatov
• Florian Brunbauer
• Florian Feldbauer
• Francesca Curciarello
• Francesco Grancagnolo
• Gabor Galgoczi
• Georgiy Razuvaev
• Gianluigi Chiarello
• Giovanni Bencivenni
• Giovanni Francesco Tassielli
• Giulia D'Imperio
• Gleb Chizhik
• Guohao Ren
• Hans Heinrich Leithoff
• Hao Liu
• Henning Keller
• Hiroyuki Sagawa
• Huirong QI
• ILARIA BALOSSINO
• IOAN DAFINEI
• Irakli Minashvili
• Ivan Basok
• Ivan Gnesi
• Ivan Nikolaev
• Ivan Ovtin
• Ivan Shulzhenko
• James Iddon
• Jens Kroeger
• Jerry Va'vra
• Jianchun Wang
• Jochen Schwiening
• Keonah Shin
• Kohei Yorita
• Kondo Gnanvo
• Konstantin Pugachev
• Kota Nakagiri
• Kozyrev Evgeny
• Kun Jiang
• LAIFU LUO
• Lee Jik
• Leonid Epshteyn
• Lev Shekhtman
• Lior Arazi
• Lucia Castillo Garcia
• Lucian Scharenberg
• Maksim Kuzin
• Manfred Jeitler
• Manfred Krammer
• Marco Chiappini
• Marco Cortesi
• Marco Panareo
• Marina Kholodenko
• Markus Preston
• Masashi Tanaka
• Masato Kimura
• Masudur Rahaman
• Matteo Giovannetti
• Matteo Saviozzi
• Matteo Turisini
• MAURO IODICE
• Maxim Titov
• Mehmet Ozgur Sahin
• Michael Traxler
• Mikhail Achasov
• Mikhail Gostkin
• Mikhail Kholopov
• Mikhail Korzhik
• Mikhail Remnev
• Mikhail Rumyantsev
• Moo Hyun Lee
• Natalya Melnikova
• Natascha Krammer
• Nickolai Muchnoi
• Nikolay Anfimov
• Nikolay Budnev
• Nikolay Podgornov
• Olga Gileva
• Paola Gianotti
• Paolo Walter Cattaneo
• Patrick Pfistner
• Pavel Krokovny
• Pavel Logachev
• Peter Kodys
• Peter Krizan
• Peter Lukin
• Petr Teterin
• Piero Spillantini
• Polyneikis Tzanis
• Promita Roy
• Raffaella Donghia
• Riccardo Farinelli
• Rita Bernabei
• Rui De Oliveira
• Saken Shinbulatov
• Savino Longo
• Semyon Khokhlov
• Serge Duarte Pinto
• Sergei Fedotov
• Sergey Chashin
• Sergey Kholodenko
• Sergey Kononov
• Sergey Morozov
• Sergey Movchan
• Sergey Pivovarov
• Sergey Ryzhikov
• Sergey Serednyakov
• Shaobo WANG
• Shoji UNO
• Shuddha Shankar Dasgupta
• Simon Eidelman
• Simone Calzaferri
• SINGH HARDEEP
• Sofia Kotriakhova
• SRIDHAR TRIPATHY
• Stanislav Malakhov
• Stepan Vereschagin
• Tamar Zakareishvili
• Tamara Shakirova
• Tapas Kumar Kundu
• Timofei Maltsev
• Tomáš Sýkora
• Triloki Pandit
• Valentin Ivanov
• Valery Tayursky
• Valery Telnov
• Vasily Kornoukhov
• Vasily Kudryavtsev
• Vasily Shebalin
• Viacheslav Kulikov
• Victor Rogov
• Victor Zhilich
• Viktor Bobrovnikov
• Vyacheslav Prisekin
• Wenliang Li
• Xiaochun He
• Yingying Shi
• Yoshihito IWASAKI
• Yun-Tsung Lai
• Yuri ERMOLINE
• Yuri Skovpen
• Yury Guz
• Yury Kudenko
• Yury Musienko
• Yury Suvorov
• Yury Tikhonov
• ZHENG LIANG
Support
• Monday, 24 February
• 09:00 11:00
Status of facilities
Convener: Prof. Yury Tikhonov (Budker Institute of Nuclear Physics)
• 09:00
Collider experiments at BINP 30m
Speaker: Prof. Pavel Logachev (BINP)
• 09:30
KEK and its plans 30m
There are two campuses in KEK, Tsukuba and Tokai. In the Tsukuba campus, the operation of the SuperKEKB accelerator just started with the full Belle II detector from March 2019. SuperKEKB and Belle II had been upgraded from KEKB and Belle, respectively. The present luminosity exceeded more than 10$^{34}$ cm$^{-2}$s$^{-1}$ with lower total beam current as compared with KEKB due to smaller vertical focusing length at the interaction point ($\beta_y^*$). It indicates that the upgrade accelerator can provide higher luminosity with higher beam current in the near future after sufficient vacuum scrubbing. The Belle II detector is basically working. Some demonstration plots will be shown in the conference. In the Tokai campus, the high intensity proton accelerator (J-PARC) has been operated for 10 years. The facility provides us various particles (pion, kaon, neutrino, neutron and muon). Several nuclear experiments has carried out using pion and kaon. The T2K experiment provides some results for the CP violation in the neutrino sector using neutrino and anti-neutrino. The status of new project (HK) and the status of the COMET experiment (the search for the charged lepton flavor violation) will be mentioned in the conference. Also, the material and other science have been performed utilizing neutron and muon.
Speaker: Shoji UNO (KEK)
• 10:00
The Experimental Program at IHEP CAS 30m remote (zoom)

### remote

#### zoom

The Institute of High Energy Physics (IHEP) of the Chinese Academy of Sciences (CAS) is a comprehensive research center for the study of particle physics in China. IHEP hosts or manages a number of key China based facilities in operation or under construction, including Beijing Spectrometer (BES III) at Beijing Electron Positron Collider (BEPC II), Daya Bay Reactor Neutrino Experiment, China Spallation Neutron Source (CSNS), Yangbajing Cosmic Ray Observatory, Hard X-ray Modulation Telescope (HXMT), Jiangmen Underground Neutrino Observatory (JUNO), Large High Altitude Air Shower Observatory (LHAASO), etc. It plays a major role in planning future research in this field, e.g. the proposed Circular Electron Positron Collider (CEPC) project. The institute is also a member of the LHC experiments, Belle II, and a few other important international collaborations. In this presentation status and plan of the IHEP experimental program will be described. A few selected detector research work will be introduced.
Speaker: Prof. Jianchun Wang (Institute of High Energy Physics, Chinese Academy of Sciences)
• 10:30
FAIR status and the PANDA experiment 30m
The international accelerator Facility for Antiproton and Ion Research in Europe (FAIR) is the next generation accelerator complex for fundamental and applied research with antiproton and ion beams. FAIR will provide worldwide unique facilities enabling a wide spectrum of unprecedented forefront research in hadron and nuclear physics in atomic physics and nuclear astrophysics as well as in applied sciences like materials research, plasma physics and radiation biophysics. Key features of FAIR are intense beams of antiprotons and ions up to the heaviest and even exotic nuclei covering an energy range from rest up to 30 GeV/u. We present a brief overview on the current construction status of the FAIR accelerator facilities and the associated research pillars with emphasis on PANDA. PANDA (Antiproton Annihilation in Darmstadt), is the central experiment to fully exploit the physics research potential of the High Energy Storage Ring (HESR) with intense, phase-space cooled, antiprotons up to 15 GeV/c impinging on a variety of fixed targets. The PANDA detector features two spectrometers, the Target Spectrometer with a SC solenoid magnet of 2 T and the Forward Spectrometer with a 2 Tm dipole magnet. In both spectrometers the PANDA collaboration employs a multitude of modern detector technologies to provide tracking, particle identification, calorimetry and muon identification, arranged hermetically close to $4\pi$ around the interaction region with additional detectors for coverage of the forward boosted particles. Focusing on the various PANDA detector systems we present an overview of recent developments, the detector construction progress and conclude with an outline for a phased deployment of PANDA at FAIR.
Speaker: Dr Anastasios Belias (GSI)
• 11:00 11:30
Coffee break 30m
• 11:30 13:00
Status of facilities
Convener: Dr Simon Eidelman (Budker Institute of Nuclear Physics)
• 11:30
CERN activities and plans in HEP 30m
Speaker: Prof. Eckhard Elsen (CERN)
• 12:00
The reserach activity of the Frascati Laboratory 20m
The Frascati National Laboratory (LNF) is the largest and the oldest among the National Laboratories of the Italian Institute for Nuclear Physics (INFN). Since its foundation in 1954, it has been devoted to two main activities: the development, construction and operation of particle accelerators; the design and construction of forefront detectors for particle, nuclear and astro-particle experiments. The focus of the scientific program carried out at LNF has always been in the field of high energy physics, but interdisciplinary research has grown of importance along the years, with a perfect balance between internal activities, carried out on site, and external ones taking place in the major laboratories all over the world. In the presentation, an overview of the research program carried out at the Laboratory will be presented.
Speaker: Dr Paola Gianotti (INFN - LNF)
• 12:20
Results of ultra-high-energy cosmic rays from the Telescope Array 20m
The Telescope Array is the largest ultra-high-energy cosmic ray (UHECR) observatory in the Northern Hemisphere. It consists of 507 surface scintillator detectors covering approximately 700 square kilometers and three fluorescence telescope sites overlooking the surface array. The aim of the Telescope Array is to explore the origin and nature of UHECR by measuring the energy spectrum and the distribution of arrival directions and mass composition of UHECR. Here the recent results of the Telescope Array are presented. In addition, we have two ongoing extensions: one is the extension for the highest-energy cosmic rays towards four times the Telescope Array and the other is the Telescope Array Low-energy Extension to explore the transition from galactic to extragalactic cosmic rays. The prospects of these extensions are presented.
Speaker: Prof. Hiroyuki Sagawa (ICRR, University of Tokyo)
• 12:40
New challenges for distributed computing at the CMS experiment 20m
The Large Hadron Collider (LHC) experiments soon step into the next period of run-3 data-taking with an increased data rate and high pileup requiring an excellent working computing infrastructure. In the future High-Luminosity LHC (HL-LHC) data-taking period, the compute, storage and network facilities have to be further extended by large factors and flexible and sophisticated computing models are essential. New techniques of modern state-of-the-art methods in physics analysis and data science, Deep Learning and Big Data tools, are crucial to handle high-dimensional and more complex problems. Beside flexible cloud computing technologies the usage of High Performance Computing (HPC) at the LHC experiments are explored. In this presentation, I will discuss the LHC run-3 and future HL-LHC runs computing technologies and the utilisation of modern physics analysis and data science methods for the increasing and complex demands of large scale scientific computing.
Speaker: Ms Natascha Krammer (Institute of High Energy Physics (Austrian Academy of Science))
• 13:00 13:10
Conference photo 10m BINP main entrance ()

### BINP main entrance

• 13:10 14:30
Lunch or Ski 1h 20m
• 14:30 15:50
Colliders and detector integration
Convener: Anton Poluektov (University of Warwick)
• 14:30
C.M.S. Energy Calibration in BES-III and VEPP-2000 experiments 20m
Inverse Compton scattering of laser radiation was implemented as a tool for accurate beam energy measurement at BEPC-II and VEPP-2000 colliders. The report summarizes the operation principles, performance and results obtained with beam energy measurement systems in these experiments.
Speaker: Prof. Nikolai Muchnoi (Budker INP SB RAS)
• 14:50
Simulation of physics background in Super c-tau factory detector 20m
Simulation of background particle fluxes generated by colliding beams is performed with FLUKA package for the Super C-Tau factory Detector (SCTD). Two processes are considered as main sources of luminosity generated background: two-photon production of electron-positron pairs and Bha Bha scattering with bremsstrahlung photon emission (radiative Bha Bha). The SCTD geometry is described corresponding to the last version of the Conceptual Design Report. The magnetic field based on the calculation in ANSYS is introduced in the model. Main results of the simulation for beam energy of 3 GeV, luminosity of 10$^{35}$ cm$^{-2}$s${^-1}$ and 1.5 T magnetic field are the following: charged particle fluence in the region of the Inner Tracker (radius 5cm – 20 cm, Z between -30cm and 30 cm) is between 10$^5$ particles/(cm$^2$ x s) and ~10$^3$ particles/(cm$^2$ x s); 1-MeV neutron equivalent fluence for Si in the regions corresponding to electronics of the Inner Tracker and the Drift Chamber is below 10$^{11}$ n/(cm$^2$ x y) and absorbed dose is below 100 Gy/y in the hottest regions of the detector.
Speaker: Mr Lev Shekhtman (Budker Institute of Nuclear Physics)
• 15:10
Background evaluation at SuperKEKB and Belle II 20m
The SuperKEKB asymmetric electron-positron collider is the upgrade of the KEKB machine and it is expected to achieve the instantaneous luminosity of $8\times10^{35}$ cm$^{-2}$s$^{-1}$, 40 times higher than the record of KEKB. With the increased luminosity, the beam background is expected to grow significantly with respect to KEKB, leading, among other effects, to possible radiation damage of detector components and to performance deterioration of the Belle II detector. SuperKEKB started operating in 2018, with a stepwise reduction of the beam size at the interaction point that has been done in the last two years, studying the evolution of background conditions. We present the studies performed in 2019 to evaluate the contributions of single beam and luminosity background sources, the conditions in which the Belle II detector has been operated so far and the perspective for the future run.
Speaker: Mr Antonio Paladino (INFN and University of Pisa)
• 15:30
The KLOE-2 e+e- tagging for two-photon physics 20m
One goal of the KLOE-2 experiment, at the Frascati $\phi-$factory, is to study $e^+e^- \to \gamma^{\ast}\gamma^{\ast}e^+e^-\to \pi^0 e^+e^-$ processes by tagging final state leptons with two scintillator hodoscopes installed, by means of roman pots, in the DA$\Phi$NE beam pipe. The High energy tagger (HET) counting rate is dominated by Bhabha scattering events without any associated signal in the KLOE detector. By comparison with the KLOE luminosity measurement, the effective Bhabha cross section per scintillator can be measured, in order to monitor detector performance and infer acceptance$\times$efficiency of the HET. The $\pi^0$ production from two-photon fusion is tagged by requiring the coincidence between the HET detector and the KLOE calorimeter when two-cluster bunches are reconstructed, and evaluating the uncorrelated HET-KLOE time coincidences. Data stability studies, based on very low angle Bhabha cross section measurement, and updates on $\gamma^{\ast}\gamma^{\ast}\to \pi^0$ search will be presented.
Speaker: Dr Francesca Curciarello (INFN-Laboratori Nazionali di Frascati)
• 15:50 16:20
Coffee break 30m
• 16:20 17:40
Colliders and detector integration
Convener: Mr Andrey Sokolov (Budker INP)
• 16:20
Superconducting solenoid for PANDA detector 20m
BINP presents the design of the 2T superconducting solenoid for PANDA detector at FAIR. Since PANDA is a fixed target experiment, the main technical challenge is the insertion of a warm target pipe vertically to the solenoid axis in correspondence with the interaction point located at 1/3 of the length of the solenoid. The solenoid consists from three interconnected coils. The paper describes the design of the cryostat with cold mass, calculations of mechanical and thermal loads of the solenoid and status production of the magnet.
Speaker: Mr Evgeniy Pyata (BINP)
• 16:40
The luminosity detector at PANDA by HV-MAPS sensors 20m
The PANDA Experiment, which is located at the High Energy Storage Ring at the FAIR accelerator center in Darmstadt, Germany, is optimized for questions of hadron physics. With this detector it will be possible to discover new states and measure their line shapes as well as the line shapes of already known states very precisely. To normalize the energy scan measurements exact knowledge of the luminosity is required. The luminosity at PANDA will be determined from the angular distribution of elastical antiprotonm proton scattering. In order to achieve an absolute measuring accuracy of 5% , the tracks of the scattered antiprotons will be measured by four planes of thinned silicon detectors (HV-MAPS). HV-MAPS are pixel sensors with integrated readout electronics. They will be operated with a reverse voltage of 60 volts to increase their radiation hardness. The four detector planes consist of CVD-diamonds on which the sensors are clued. To reduce the multiple scattering the detector is operated in a vacuum. The concept of the luminosity detector is presented and technical aspects such as the vacuum system, cooling, electronics, and sensors are discussed, as well as insights into data analysis.
Speaker: Dr Florian Feldbauer (University Mainz)
• 17:00
A possible LHCb Luminosity Monitor based on the Muon System 20m
The Muon System of the LHCb experiment, after the ongoing upgrade, will be composed of 4 stations which comprise 1104 multi-wire-proportional-chambers (MWPC) with order of $10^5$ readout channels. We are investigating the possibility of using the rates recorded on the Muon chambers to measure the luminosity. A first study in this direction was performed analyzing the rates measured during special runs taken in 2012 at instantaneous luminosities up to $10^{33}$ $cm^{-2}s^{-1}$ and correlating them to the calorimeter-based measurements. After the correction for the dead time of the electronics the results were very promising allowing to estimate the correct values of luminosity with a precision better than 1%. The same method was also applied to a new set of runs taken in 2018 with a different LHC filling scheme necessary to achieve even higher values of instantaneous luminosity. Both the analyses will be presented to explore the possibility of using the muon system to monitor LHCb luminosity in future runs without the support of the calorimeter.
Speaker: Sofia Kotriakhova (INFN Sezione di Roma)
• 17:20
The PADME detector at LNF 20m
The Positron Annihilation into Dark Matter Experiment (PADME) aims to search for the production of a dark photon in the process e + e → A 0 γ. It exploits the 550 MeV positron beam provided by the DAΦNE LINAC impinging on a thin target. The primary beam crosses a diamond target and if it does not interact it is bent by a magnet in between the end of the spectrometer and the calorime- ter, thus leaving the experiment undetected. If any kind of interaction causes the positron to lose more than 50 MeV of energy, the magnet bends it into the spectrometer acceptance, providing a veto signals against bremsstrahlung back- ground. In case of annihilation, the accompanying ordinary photon is detected by the electromagnetic calorimeter regardless of the A 0 decay products. A single kinematic variable characterizing the process, the missing mass, is computed using the formula: M2 miss = (P beam + P e − − P γ ) 2 Its distribution should peak at M A 2 0 for A 0 decays, at zero for the concurrent e + e → γγ process, and should be smooth for the remaining background. To measure such a reaction, the PADME apparatus has been built at the Frascati National Laboratory of INFN. It consists of a small scale detector composed of the following parts: • a diamond active target, to measure the position and the intensity of the beam in each single bunch; • a beam monitor system consisting of two different silicon-pixel detectors. The first one, located at the beam entrance, can be inserted in place of the target to tune beam parameters; the second, located on the beam exit trajectory, monitors the beam spot during the data taking; • a spectrometer, to measure the charged particles momenta in the range 50-400 MeV; • a dipole magnet, to deflect the primary positron beam out of the spec- trometer and the calorimeter and to allow momentum analysis; • a vacuum chamber, to minimize the unwanted interactions of primary and secondary particles; • a finely segmented, high resolution electromagnetic calorimeter, to measure 4-momenta and veto final state photons. Each element has specific requirements that are stringent and sometimes at the limit of present technology. A commissioning run has been performed between 2008 and 2019, and in Febru- ary 2020 the experiment is expected to take data for two months. The talk will give an overview of each detector component and a description of the chosen technical solutions implemented to accomplish the experiment needs. An insight of possible future upgrades will be given as well.
Speaker: Danilo Domenici (INFN - LNF)
• 17:40 18:00
Particle Identification
Convener: Dr Simon Eidelman (Budker Institute of Nuclear Physics)
• 17:40
Forward RICH detector for the PANDA experiment 20m
The PANDA detector at the international accelerator Facility for Antiproton and Ion Research in Europe (FAIR) in Darmstadt (Germany) will address fundamental questions of hadron physics in high-energy antiproton collisions with fixed hydrogen and nuclear targets. The PANDA Forward RICH (FRICH) is intended for identification of charged particles with forward polar angles below 5°–10° and momenta from 3 to 15 GeV/c. PANDA FRICH will feature a multilayer focusing aerogel radiator, photon detection by Hamamatsu H12700 MaPMTs and DiRICH front-end electornics. Precisely aligned flat mirrors will collect Cherenkov light on the photon detector. Results of optical measurements of the detector components are presented. The PANDA Forward RICH prototype was tested at 3-GeV electron beam at the Budker INP in 2019. Single photon resolution was obtained that agrees with expectations.
Speaker: Mr Sergey Kononov (BINP)
• 18:00 19:00
Excursion over BINP 1h
• 19:00 21:30
Reception 2h 30m BINP Canteen ()

### BINP Canteen

21:30 Bus to the hotels

• Tuesday, 25 February
• 09:00 11:10
Tracking and vertex detectors
Convener: Mr Lev Shekhtman (Budker Institute of Nuclear Physics)
• 09:00
Current R&D and Future Trends in Silicon Detectors 30m
With the LHC experiments preparing their upgrades for the High-Luminosity LHC (HL-LHC) there has been a natural emphasis on the R&D for their future tracking detectors. Beyond the HL-LHC developments new technologies and solutions have emerged that will pave the way for future tracking detectors. The presentation will review currently ongoing R&D activities and highlight future trends. It will not only focus on the silicon sensors and front-end electronics, but also cover engineering and integration aspects.
Speaker: Mr Andreas Mussgiller (DESY)
• 09:30
Silicon pixel-detector R&D for CLIC 20m
The physics aims at the proposed future CLIC high-energy linear e-e+ collider pose challenging demands on the performance of the detector system. Precise hit-time tagging with ~5 ns resolution is required for the vertex and tracking detectors, to mitigate the impact of beam-induced background on the measurement accuracy. Moreover, a low mass of ~0.2% X0 per layer for the vertex and ~1% X0 per layer for the tracker is needed, combined with a single-plane spatial resolution of a few micrometers. To address these requirements, an all-silicon vertex and tracking system is foreseen at CLIC. To this end, a broad R&D program on new silicon detector technologies is being pursued. For the ultra-light vertex detector, different small pitch (25 um) hybrid technologies with innovative sensor concepts are explored. A dedicated 65 nm readout chip (CLICpix2) has been developed and interconnected via fine pitch bump-bonding to thin planar sensors. Furthermore, alternative interconnects such as bonding using anisotropic conductive films (ACF) are explored. Various Silicon On Insulator (SOI) test chips are also under study. For the large-scale silicon tracker, fully monolithic CMOS technologies are considered. CMOS sensors with a large collection electrode have been extensively studied in various test-beam campaigns. Based on 3D TCAD simulations and previous test results, innovative concepts for CMOS sensors with a small collection electrode have been developed and implemented in various prototype chips targeting CLIC and other future projects. The CLICTD tracker prototype chip has recently been produced using two variants of a modified 180 nm CMOS process with a high-resistivity epitaxial layer. The design includes an innovative sub-pixel segmentation scheme and first samples are currently under evaluation. To predict and further optimise the performance of the various prototype technologies, a fast and versatile Monte Carlo Simulation Tool (Allpix-Squared) has been developed. This contribution gives an overview of the R&D program for the CLIC vertex and tracking system, highlighting new results from measurements and simulations of recent prototypes.
Speaker: Mr Jens Kroeger (University of Heidelberg &amp; CERN)
• 09:50
The ATLAS Strip Detector System for the High-Luminosity LHC 20m
The ATLAS experiment at the Large Hadron Collider is currently preparing for a major upgrade of the Inner Tracking for the Phase-II LHC operation, scheduled to start in 2026. The radiation damage at the maximum integrated luminosity of 4000/fb implies integrated hadron fluencies over $2x10^{16}$ $n_{eq}/cm^2$ requiring a complete replacement of the existing Inner Detector. An all-silicon Inner Tracker (ITk) is under development with a pixel detector surrounded by a strip detector. The current prototyping phase, targeting an ITk Strip Detector system consisting of four-barrel layers in the center and forward regions composed of six disks at each end. With the production of modules scheduled to begin in 2020 and after successfully passing the Final Design Review, a thorough understanding of the current prototype modules is critical. In this contribution, we present the design of the ITk Strip Detector and outline the current status of R&D and prototyping on various detector components as well as reports on tests of prototype end-cap strip modules at DESY test beam facilities. The modules under study in test beams are irradiated and unirradiated so-called R0 modules, designed for the innermost region of end-cap wheels where radiation and occupancy conditions are the most severe. An R0 module is comprised of a sensor with glued-on readout hybrids and a power board. We will also present results from the first double-sided R0 prototype module, built using a carbon-fiber core with integrated services. The results focus on the detection efficiencies and spatial resolution of the modules, both in general and for specific regions of each module and to beam positions within or in between strips. The overall performance of the prototypes will also be discussed, for example relating detection efficiencies to noise occupancies.
Speaker: Mr Arturo Rodriguez (University of Freiburg)
• 10:10
Commissioning of the New ALICE Inner Tracking System 20m
The upgrade of the Inner Tracking System (ITS) of the ALICE detector will extend measurements of heavy-flavour hadrons and low-mass dileptons to a lower $p_T$ and increase the read-out capabilities to incorporate the full interaction. Furthermore, the tracking efficiency will be improved at low $p_T$. Some of the new measurements of heavy-flavour probes possible after the ITS upgrade and with an integrated luminosity of $10nb^{-1}$ include the nuclear modification factor and anisotropic flow down to $p_T$ of 2 GeV/c and 3 GeV/c respectively for the $\Lambda_c$ baryon. To achieve this, the new ITS is comprised of 7 layers of a custom monolithic active pixel sensor design known as ALPIDE. The use of the ALPIDE-based detector design will reduce the material budget to 0.35%$X_0$ per layer for the inner most three layers, and to 1.0%$X_0$ per layer for the outer most four layers, compared to 1.14%$X_0$ per layer in the previous ITS. The readout rate will be improved to 100 kHz for Pb-Pb interactions, which is the double of the upgrade requirement. In addition, the radius of the first layer of the ITS will be reduced from 39mm to 23mm and the pixel size reduced to $O(30\mu m)$ x $O(30\mu m)$. The effort in over 10 construction sites has resulted in a fully assembled and connected detector, which is currently under going on surface commissioning before it will be installed in the ALICE cavern in July 2020. This contribution will discuss the current status of the commissioning of the new ITS, including the methods used to characterise the detector and the results obtained so far.
Speaker: Mr James Iddon (CERN)
• 10:30
Silicon Vertex Detector and Data Quality Monitoring at the Early Start of the Belle II Experiment. 20m
The Belle II experiment is a substantial upgrade of the Belle detector and will operate on the SuperKEKB energy-asymmetric $e^+ e^-$ collider at KEK in Tuskuba, Japan. The accelerator successfully completed the first phase of commissioning in 2016 and the Belle II detector saw its first electron-positron collisions in April 2018. Belle II features a newly designed silicon vertex detector based on double-sided strip and DEPFET pixel detectors. A subset of the vertex detector was operated in 2018 to determine background conditions (Phase 2 operation); installation of the full detector was completed early in 2019 and the experiment started full data taking. This talk will report on the final arrangement of the Belle II silicon vertex detector with focus on silicon vertex detector setup, its data acquisition workflow, online and offline monitoring of detector conditions and data quality, design and use of diagnostic and reference plots, and integration with the software framework of Belle II.
Speaker: Peter Kodys (Charles University)
• 10:50
SciFi - The new Tracker of the LHCb experiment 20m
The LHCb Collaboration is currently in the final step of an upgrade that will allow the experiment to operate at much higher luminosities and with a triggerless readout. The main tracking stations which originally were subdivided in an Inner Tracker made from silicon strip sensors and an Outer Tracker built from straw-tubes is being replaced by single detector, the Scintillating Fibre Tracker (SciFi). The SciFi covers a total detector area of 340 m2 by using more than 10,000 km of scintillating fibre with 250 μm diameter, enabling a spatial resolution of better than 100 μm for charged particles. It is built from individual modules (0.5 m × 4.8 m) comprised of 8 scintillating fibre mats with a length of 2.4 m as the active detector material. The 13 cm wide fibre mats consist of 6 layers of densely packed blue emitting scintillating fibres. The scintillation light is detected with arrays of multi-channel silicon photomultipliers (SiPMs) cooled to -40C to minimize the expected high dark noise from neutron radiation. The readout of 524k channels occurs through custom-designed front-end electronics. Since it is the first time that this technology is been used as a large tracker and with a small granularity many challenges has to be overcome. The talk will give an overview of the SciFi detector design, production, performance and the status of the detector assembly.
Speaker: Dr André Massafferri Rodrigues (Brazilian Center for Physics Research)
• 11:10 11:30
Coffee break 20m
• 11:30 13:20
Tracking and vertex detectors
Convener: Mr Lev Shekhtman (Budker Institute of Nuclear Physics)
• 11:30
The Evolution of Drift Chambers at e+e- Colliders 30m
The overview of Drift Chambers detectors will be done.
Speaker: Dr Francesco Grancagnolo (INFN)
• 12:00
The Drift Chamber of the MEGII experiment 20m
The MEG experiment at the Paul Scherrer Institut searches for the charged Lepton Flavor Violating $\mu^{+}\rightarrow e^{+}\gamma$ decay. MEG has already determined the world best upper limit on the branching ratio: BR$<$4.2 $10^{-13}$ @ 90 \% C.l. An upgrade (MEG II) of the whole detector has been approved to obtain a substantial increase in sensitivity. Currently MEG II is completing the upgrade of the various detectors, an engineering run and a pre-commissioning run were carried out during 2018 and 2019. The positron tracker is a unique volume, cylindrical drift chamber, with the axis parallel to the muon beam. The external radius ($30~cm$) of the chamber is constrained by the available space inside the COBRA magnet, while the internal radius ($17~cm$) is large so that low energy positrons, less than $45~MeV/c$, are swept out of the magnet by the gradient field without crossing the sensitive volume. With the new tracking system layout the main advantages are that the positrons with a momentum greater than $45~MeV/c$ will be tracked as close as possible to the Timing Counter system (TC) by using a very small amount of material, 1.45 10$^{-3}$ X$_{0}$, allowing to increase: the positron reconstruction efficiency, the postiron momentum and vertex resolutions and to the positron timing matching resolution. The single drift cell is approximately square, with a $20~\mu$m gold plated W sense wire surrounded by $40~\mu$m silver plated Al field wires in a ratio of 5:1. For equalizing the gain of the innermost and outermost layers, two guard wires layers ($50~\mu$m silver-plated Al) have been added at proper radii and at appropriate high voltages. The total number of wires amounts to 11904. Due to the high wire density ($12 wires/cm^{2}$) and the stringent precision requirements on the wire position and uniformity of the wire mechanical tension (better than $0.5~g$) impose the use of the classical feed-through technique as wire anchoring system could hardly be implemented and therefore it was necessary to develop new wiring strategies. The basic idea is to create a multi-wires plane, by soldering the wires between two $40~\mu$m thick custom wire-PCBs. Despite to the conceptual simplicity of the building strategies, to ensure the electrostatic stability of the drift cells and meet the requirements on the uniformity of the wire mechanical tension for all the multi-wires plans necessary for the construction of the CDCH. All these constraints require the use of an automatic wiring system (called wiring robot). The CDCH is the first drift chamber ever designed and built in a modular way, in fact, it is built by overlapping along the radius, alternatively, multi-wires plane and PEEK spacers, to set the proper cell width, in each of the twelve sectors, between the spokes of the rudder wheel shaped end-plate. A carbon fiber support structure guarantees the proper wire tension and encloses the gas volume. At the innermost radius, an Al Mylar foil separates the drift chamber gas volume from the helium filled target region. We describe the CDCH design and construction (wiring procedure and assembly procedure). The wiring phase at INFN-Lecce, the choice of the wires, their mechanical properties and a material budget estimation are presented. The assembly and sealing at INFN-Pisa are then describe, before the preparation of the endcaps services.
Speakers: Mr Gianluigi Chiarello (INFN Roma1), Dr Giovanni Francesco Tassielli (INFN Lecce &amp; University of Salento)
• 12:20
Central Drift Chamber for the Belle II experiment 20m
The Central Drift Chamber (CDC) is the main part of the tracking system in the Belle II experiment. It has a cylindrical shape with 2.3-m-length and 0.3(2.2)-m-inner(outer)-diameter, surrounding the $e^+$-$e^-$ collision point. It consists of 9 super layers, which are composed of 8 (for the innermost super layer) or 6 (for the others) sub-layers. Axial and stereo super layers are alternately arranged to provide 3-dimensional tracking. The CDC was developed and installed in Oct. 2016, and it has been operated in the Belle II data taking since Mar. 2018. We will present the overview of the CDC, the operation status, and its performance with the cosmic-ray and $e^+$-$e^-$ collision data.
Speaker: Dr Kota Nakagiri (High Energy Accelerator Research Organization (KEK), Institute of Particle and Nuclear Studies (IPNS))
• 12:40
Small-Strip Thin Gap Chambers for the Muon Spectrometer Upgrade of the ATLAS Experiment 20m
The instantaneous luminosity of the Large Hadron Collider at CERN will be increased by about a factor of five with respect to the design value by undergoing an extensive upgrade program over the coming decade. The largest phase-1 upgrade project for the ATLAS Muon System is the replacement of the present first station in the forward regions with the New Small Wheels (NSWs) during the long-LHC shutdown in 2019-2021. Along with Micromegas, the NSWs will be equipped with eight layers of small-strip thin gap chambers (sTGC) arranged in multilayers of two quadruplets, for a total active surface of more than 2500 m$^2$. To retain the good precision tracking and trigger capabilities in the high background environment of the high luminosity LHC, each sTGC plane must achieve a spatial resolution better than 100 μm to allow the Level-1 trigger track segments to be reconstructed with an angular resolution of approximately 1mrad. The basic sTGC structure consists of a grid of gold-plated tungsten wires sandwiched between two resistive cathode planes at a small distance from the wire plane. The precision cathode plane has strips with a 3.2mm pitch for precision readout and the cathode plane on the other side has pads for triggering. The sTGC design, performance, construction and integration status will be discussed, along with results from tests of the chambers with nearly final electronics with beams, cosmic rays and high-intensity radiation sources.
Speaker: Mr Denis Pudzha (PhD student)
• 13:00
Novel focal plane detector concepts for the NSCL/FRIB S800 spectrometer 20m
The NSCL/FRIB S800 superconducting spectrograph is used for studying nuclear reaction induced by high-energy radioactive beams. The spectrometer was designed for high-precision measurements of small scattering angles (within ±2 msr), combined to large acceptance of the solid angle (20 msr) and momentum (6%). The high-resolution (1/10,000) is optimized for energies up to 200 MeV/u. The S800 has been an indispensable apparatus for the wide physics program of the NSCL with fast rare isotope beams, being the most heavily-used experimental device at NSCL. The S800 spectrograph will continuous to serve the nuclear physics/astrophysics community for experiments with rare isotope beams also during FRIB operation. A crucial component for the performance of the S800 spectrometer is the focal plane detector system, which consists of an array of various detector technologies for trajectory reconstruction as well as particle identification (PID). This includes two x/y drift chambers for tracking, an ionization chamber for atomic number identification by energy loss measurement, and a plastic scintillator for timing (as well as energy loss). Downstream the plastic scintillator, a CsI(Na) hodoscope is deployed to identify atomic charge states of the implanted nuclei via total kinetic energy (TKE) measurement. In this work, the operational mechanism and performance of a novel detector concepts planned for the upgrade of the S800 focal plane are described for the first time. In particularly, we will present the design of the new drift chamber (DC) readout based on a hybrid Micro-Pattern Gaseous Detector structure. Performance evaluations under irradiation with small lab source (5.6 MeV alpha–particle emitted by an Am-241 source) as well as with test heavy-ion beams will be presented and discussed in detail. In the latter case we the detector was irradiated by a 78Kr36+ beam at around 150 MeV/u, as well as by a heavy ion fragmentation cocktail produced by the 78Kr beam impinging on a Be target. In addition, we will present the development of a heavy-ion particle identification (PID) device based on an energy-loss measurement (ΔE) within a novel optical scintillation scheme. The new instrument consists of a multi-segmented optical detector (OD) filled with high-luminescence yield gas (e.g. pure Xenon). Its operational principle is based on recording the fast scintillation light emitted along an ion’s track. This developing technology allows for high-resolution ΔE measurements at high counting rate, unlike traditional ionization chambers. Both high energy resolution and high counting rate capabilities are needed to take full advantage of the future FRIB’s rare-isotope beam portfolio and anticipated high intensity. The proposed detector presents a significant advance in both instrumentation and capabilities in the field of experimental nuclear physics, providing new opportunities for experiments with rare isotope beams.
Speaker: Dr Marco Cortesi (NSCL)
• 13:20 14:40
Lunch or Ski 1h 20m
• 14:40 15:40
Tracking and vertex detectors
Convener: Mr Lev Shekhtman (Budker Institute of Nuclear Physics)
• 14:40
CYGNO: a gaseous TPC with optical readout for dark matter directional search 20m
The CYGNO project has the goal to use a gaseous TPC with optical readout to detect dark matter and solar neutrinos with low energy threshold and directionality. CYGNO will be part of the CYGNUS-TPC network with several underground laboratories around the world, that aim at reaching a total gas volume of about 1000 m$^3$. The CYGNO demonstrator will have 1 m$^3$ volume filled with He:CF$_4$ gas mixture at atmospheric pressure. Ionization electrons created by the particles interacting in the gas are drifted by the electric field to a three-layers GEM structure, and the light produced in the avalanche is monitored by sCMOS sensors providing a high granularity 2D track reconstruction. The 3rd coordinate is obtained using the time profile of light, simultaneously measured by photomultiplier tubes (PMT) with fast response. The combined readout of sCMOS sensors and PMTs provides a full 3D reconstruction, therefore allowing to infer the direction of the incoming particle. Such detailed reconstruction of the event topology gives also a powerful tool to discriminate signal from background, mainly represented by low energy electron recoils induced by radioactivity. The high reconstruction efficiency with directionality of tracks down to energies of order 1 keV will give to CYGNO sensitivity to low mass dark matter and the potential to overcome the neutrino floor, that will ultimately limit non-directional dark matter searches.
Speaker: Dr Giulia D'Imperio (INFN Roma)
• 15:00
MPD TPC status 20m
In the frame of the JINR scientific program on study of hot and dense baryonic matter a new accelerator complex Ion Collider fAcility (NICA) based on the Nuclotron-M is under realization. It will operate at a luminosity up to 1027 cm-2 s-1 for ions up to Au79+. Two interaction points are foreseen at NICA for two detectors which will operate simultaneously. One of these detectors, the Multi-Purpose Detector (MPD), is optimized for investigations of heavy-ion collisions. The Time-Projection Chamber (TPC) is the main tracking detector of the MPD central barrel. It is a well-known detector for 3-dimensional tracking and particle identification for high multiplicity events. The conceptual layout of MPD, TPC design and it’s parameters, the current status of the readout based on multiwire proportional chamber (MWPC) and readout electronics based on SAMPA chip as well as the status of TPC subsystems are presented.
Speaker: Mr Sergey Movchan (JINR)
• 15:20
Performance of the continuous ions suppression TPC prorotype for circular collider 20m remote (zoom)

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The circumference of CEPC(Circular Electron Positron Collider) is 100km, with two interaction points available for exploring different detector design scenarios and technologies. Two common RF stations are deployed for the Higgs operation, which result in 286 beam bunches evenly distributed over a half ring. While for W and Z operations, independent RF cavities are used, 5220 and 10900 bunches are spreading in equal distance over the full ring, respectively. Therefore, the bunch spacing are about 500ns, 50ns and 30ns for Higgs, W and Z operations, respectively. Aiming for the CDR and TDR of the CEPC project, the feasibility study of TPC tracker detector was initiated for the purpose to identify feasible technology options and to gain expertise to build the detector units which meet the basic requirements of the CEPC detector design. The TPC detector at the proposed circular collider will have to be operated continuously and the backflow of ions must be minimized without the open/close time of a gating device technology. The gain of the selection detector module can be achieved up to about 5000 without any obvious discharge behaviour. The currents on the anode and drift cathode were measured precisely with an electrometer. The experimental results showed that IBF can be reduced to less than 0.1% at the specific gain. All update IBF results have been compared with ALICE TPC option and DMM(Double Mesh Micromegas) using 55Fe and X-ray tube. The future R&D has been mentioned to meet the high luminosity at Z.
Speaker: Dr HUIRONG QI (Institute of High Energy Physics, CAS)
• 15:40 16:20
Electronics, Trigger and Data Acquisition
Convener: Dr Vladimir Zhulanov (Budker INP)
• 15:40
Front-End Electronics development for TPC/MPD detector of NICA project 20m
Time Projection Chamber is the main tracker of the Multi-Purpose Detector. The detector will operate at one of beam interaction points of the collider NICA and it is optimized to investigate both hot and dense baryonic matter. The TPC Front-End Electronics will operate with event rate up to 7 kHz at average luminosity 10^27 cm^-2s^-1 for gold collisions at √SNN = 9 GeV/n. The electronics is based on the novel ASIC SAMPA, FPGAs and high-speed serial links. Each of 24 readout chambers will serve by 62 Front-End Cards and one Readout and Control Unit. The whole system will contain 1488 FECs, 24 RCUs which gives us 95232 registration channels. The presents current status of the FEE development and results of the FEC testing.
Speaker: Mr Stepan Vereschagin (Joint Institute for Nuclear Research)
• 16:00
Current and Future FPGA-TDC Developments at GSI 20m
High precision time measurements as well as pulse width encoded charge measurements are a crucial element in particle identification detectors. FPGA based time-to-digital converters have been proven to be very useful devices for this task. The design efforts at GSI lay special emphasis on providing low and lowest cost platforms for TDCs. This is due to the fact that in particle physics, massive amounts of TDCs are used in detector facilities. Therefore, we target absolute low cost devices such as Lattice ECP5, while keeping the timing performance on the already achieved level and still improving many more aspects. Two different second generation architectures are currently under development: Eraser and Eins11!. For Eraser, the target specs are: ~10ps time precision RMS with 48 channels on ECP5, and 64 channels on ECP3. Eins11! can provide 64 channels in the ECP5, but with a lower precision in the order of 100ps. Further features of both architechtures are: - Channels can be combined pairwise under program control in order to increase precision or decrease deadtime - ToT measurements in any channel using a stretcher, or using two channels - Increased resolution by having two edges in the TDL at any time (Wave Union type A) - 40-bit timestamps - Single-cycle encoder with 100% efficiency running at 290MHz - Pipelined trigger operation: up to 16 triggers can be issued before the first one needs to be returned - Freely positionable trigger window relative to trigger signal - Per-channel trigger window comparator for fast read-out (high trigger rate) - On-the-fly elimination of hits that drop out of the trigger window (on each channel) to lower internal data rate - Additional deadtime-free Sampling-TDC on each channel with a sampling rate of 1.16GS/s - Logic Analyzer Memory for all channels, variable sampling rate, maximum trace length 28us - High-performance 32-bit pulse counter on each channel - On-the-fly fine-time calibration using per-channel lookup tables - Protection against overflow conditions and corrupted input signals On ECP3, a preliminary implementation achieved a precision of 11ps mean. The current target platforms are the proven systems TRB3, TRB3sc, DiRICH as well as the new low-cost ECP5 system TRB5sc.
Speaker: Dr Michael Traxler (GSI Helmholtzzentrum für Schwerionenforschung GmbH)
• 16:20 16:40
Coffee break 20m
• 16:40 18:20
Electronics, Trigger and Data Acquisition
Convener: Dr Vladimir Zhulanov (Budker INP)
• 16:40
Belle-II Level-1 trigger 20m
The Belle-II Level-1 trigger has been designed and constructed to select physics events of our interests for the Belle-II experiment at the asymmetric-energy electron-positron collider SuperKEKB. Our main physics target is a B-meson pair produced via Upsilon 4S, but also continuum event and a tau pair are important. To select those events with high efficiency, we use signals from the central drift chamber and the electromagnetic calorimeter. We describe our Level-1 trigger system and its performance during the operation of SuperKEKB in 2019.
Speaker: Yoshihito IWASAKI (KEK)
• 17:00
The Phase-2 Upgrade of the Hardware Trigger of CMS at the LHC 20m
The CMS experiment uses a two-level triggering system consisting of the Level-1, instrumented by custom-design hardware boards, and the High Level Trigger, a streamlined version of the offline reconstruction software running on a computer farm. The upgrade of the collider to the “High-Luminosity LHC” that will deliver a luminosity of $5-7 \cdot 10^{34} cm^{-2}s^{-1}$, corresponding to 140--200 pile-up events, also necessitates a substantial upgrade of the trigger system to make optimal use of the data. An important difference from the present system will be that after the upgrade, information from the silicon strip tracker will be available already for the Level-1 Trigger. This will allow CMS to use so-called “particle flow” objects, i.e. signals seen not only in one subdetector but put together from all available subdetectors, resulting in much sharper cuts on trigger objects. Also, trigger rates will rise both at Level-1 (from 100 kHz to 750 kHz) and at the High-Level Trigger. At the same time, more sophisticated algorithms will be available at Level-1. To make this possible, the latency - the processing time available for arriving at the Level-1 trigger decision - will increase significantly. Machine-learning techniques such as Boosted Decision Trees have already started to be implemented in the trigger electronics and will occupy a more important place in the future. The use of High-Level Synthesis (HLS) tools will allow physicists to formulate trigger requirements in a language closer to that of data analysis. To avoid missing unexpected signatures from New Physics, studies are underway to employ anomaly detection using autoencoders.
Speaker: Manfred Jeitler (HEPHY Vienna)
• 17:20
High-level trigger for the upgraded LHCb detector 20m
The LHCb experiment at the LHC collider at CERN is undergoing a major upgrade in 2019-2021. The goal is to be able to operate at an instantaneous luminosity of $2\times 10^{33}$ cm$^{-2}$ s$^{-1}$, which is 5 times higher than the luminosity in previous LHCb runs. This requires a major redesign of the trigger system due to outstanding rate of beauty and charm hadron production. In the upgraded trigger, the hardware (level-0) stage will be dropped and the detector will be fully read out at 30 MHz. A fully software trigger will be operating at the collision frequency, where a full offline-quality reconstruction will be performed. In this talk, I will cover the design aspects of the software trigger, and will present the computing and physics performance of the high-level trigger for upgraded LHCb.
Speaker: Anton Poluektov (Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France)
• 17:40
Electronics Performanceof the ATLAS New Small Wheel Micromegas wedges at CERN 20m
Speaker: Dr Polyneikis Tzanis (National Technical University of Athens)
• 18:00
Upgrade of the Muon Drift Tube (MDT) electronics for the ATLAS Phase-II upgrade 20m
The ATLAS monitored drift tube (MDT) chambers are the main component of the precision tracking system in the ATLAS muon spectrometer. The MDT system is capable of measuring the sagitta of muon tracks to an accuracy of 60 μm, which corresponds to a momentum accuracy of about 10% at pT=1 TeV. To cope with large amount of data and high event rate expected from the High-Luminosity LHC (HL-LHC) upgrade, ATLAS plans to use the MDT detector at the first-trigger level to improve the muon transverse momentum resolution and reduce the trigger rate. The new MDT trigger and readout system will have an output event rate of 1 MHz and a latency of 6 us at the first-level trigger. A new trigger and readout system has been proposed. Prototypes for two frontend ASICs and a data transmission board have been designed and tested, and detailed simulation of the trigger latency has been performed. We will present the overall design and focus on latest results from different ASIC and board prototypes.
Speaker: Chrysostomos Valderanis (LMU)
• 18:20 18:30
Intermission 10m
• 18:30 19:30
Camera music concert 1h
• Wednesday, 26 February
• 09:00 11:10
Timing detectors
Convener: Dr Peter Krizan (JSI and University of Ljubljana)
• 09:00
High precision time measurements in future experiments 30m remote (zoom)

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New experiments are attempting to measure time together with position. The aim is to reach single photon timing resolution at a level of ~100ps for RICH detectors and 20-30ps for minimum ionizing particles in TOF detectors. The talk discusses present limits and judges what is realistically achievable. Detector examples discussed use of MRPCs, MCP-PMTs, Diamond detectors, SiPMTs, Low and high gain Avalanche diodes (LGADs) and Micromegas. We specifically discuss issues such as single pixel vs. multi-pixel tests, small test vs. large physics system results and hidden problems people usually do not want to talk about.
Speaker: Dr Jerry Va'vra (SLAC)
• 09:30
A High-Granularity Timing Detector for the Phase-II upgrade of the ATLAS Calorimeter system: detector concept, description and R&D and beam test results 20m
The increase of the particle flux (pile-up) at the HL-LHC with luminosities of L ≃ 7.5 × 10$^{34}$ cm$^{−2}$s$^{−1}$ will have a severe impact on the ATLAS detector reconstruction and trigger performance. The end-cap and forward region where the liquid Argon calorimeter has coarser granularity and the inner tracker has poorer momentum resolution will be particularly affected. A High Granularity Timing Detector (HGTD) is proposed in front of the LAr end-cap calorimeters for pile-up mitigation and for luminosity measurement. It will cover the pseudo-rapidity range from 2.4 to 4.0. Two Silicon sensors double sided layers will provide precision timing information for MIPs with a resolution better than 30 ps per track in order to assign each particle to the correct vertex. Readout cells have a size of 1.3 mm × 1.3 mm, leading to a highly granular detector with 3 millions of channels. Low Gain Avalanche Detectors (LGAD) technology has been chosen as it provides enough gain to reach the large signal over noise ratio needed. The requirements and overall specifications of the HGTD will be presented as well as the technical proposal. LGAD R&D campaigns are carried out to study the sensors, the related ASICs, and the radiation hardness. Laboratory and test beam results will be presented.
Speaker: Dr Lucia Castillo Garcia (Institut de Fisica d'Altes Energies (IFAE))
• 09:50
Precise charged particle timing with the PICOSEC detection concept 20m
Precise timing at the level of a few 10ps is a key requirement for unambiguous 4D track reconstruction in future high-luminosity HEP experiments. The PICOSEC detection concept developed in the context of the RD51 collaboration aims to provide precise charged particle timing with a Micromegas detector coupled to a Cherenkov radiator with a photocathode. An excellent timing resolution of 24ps for MIPs was achieved with this concept with a single-pad prototype with a CsI photocathode. Muon beam tests, laser studies as well as detailed simulations have been used to understand the timing characteristics of this detector. Ongoing developments towards larger detectors capable of operating in high particle flux environments include multi-channel PICOSEC modules, resistive Micromegas and robust photocathode materials. Multi-pad prototypes have been shown to preserve the timing capabilities even for the case of signal sharing across multiple pads and spark-resistant resistive Micromegas have been operated in particle beams achieving comparable timing performance. Alternative photocathode materials including diamond-like carbon (DLC), boron carbide and pure metals are studied to replace CsI in harsh ion backflow conditions. The progress and developments towards robust large-area PICOSEC detectors for precise timing applications in future experiments will be presented.
Speaker: Florian Brunbauer (CERN)
• 10:10
The MIP Timing Detector for the CMS Phase II Upgrade 20m
The Compact Muon Solenoid (CMS) detector at the CERN Large Hadron Collider (LHC) is undergoing an extensive Phase-II upgrade program to cope with the challenging conditions of the future High-Luminosity LHC (HL-LHC). There will be a significant increase in the expected number of simultaneously occurring, separate events (pile-up) at the HL-LHC. The new CMS timing detector will enable us to measure minimum ionizing particles (MIP) with a time resolution of 30-50 ps with a hermetic coverage up to a pseudo-rapidity of |η|=3 during its lifetime. Such a high precision timing information will be used to mitigate the impact of the pile-up events by employing four dimensional reconstruction algorithms. It will also extend the physics reach of the detector by enabling searches for the long-lived particles predicted in different beyond the Standard Model scenarios. The MIP timing detector consists of a single layer LYSO crystals readout with SiPMs in the central region (barrel) and two Low Gain Avalanche Diode detector layers in both end-caps of the CMS detector. This talk is organized in four parts: the physics case for the MTD will be discussed in the first part of the talk, which will be followed by the description of the barrel and endcap timing layers, the final part will be dedicated to the distribution of the timing synchronization (LHC clock) and the data acquisition system of the MTD.
Speaker: Dr Mehmet Ozgur Sahin (CEA Saclay Irfu)
• 10:30
ATLAS Forward Proton Time-of-Flight Detector - LHC Run2 performance and experiences 20m
The performance of the ATLAS Forward Proton Time-of-Flight (ToF) Cherenkov detector is shown using the ATLAS collaboration data collected in the 2017 running period of the LHC Run2. The detailed analysis of the results, including detector efficiency and time resolution of the ToF is performed. The detector construction and its expected performance based on beam tests results are briefly summarized at the beginning of the first part of the talk. Operational experiences, problems caused due to attempts to operate MCP-PMTs in the vacuum and leading to the change of the detector construction, the request for R2D2 like construction of a new, future, MCP-PMT due to the observed gain drop for high rates and its non-recoverability are described. Also, other tested hardware changes are presented – the effect of the replacement of non-monolithic by monolithic crystal bars, the change of the MCP-PMT back-end electronics based on simulation to reduce signal cross talk resulting in further detector time resolution improvement. The second part of the talk is devoted to the achieved time resolutions, 20 ± 4 ps and 26 ± 5 ps, of two installed ToF detectors. Despite of their very low efficiencies (below 10%) in major parts of the analyzed data, this represents a superb time resolution for detectors operating a few millimeters from the LHC beams and making them, from the time resolution point of view, the best ToF detector among those operated by the different LHC experiments in the forward regions during the LHC Run2. At the end the possibility of reconstruction of z-coordinate of the ATLAS interaction region using the ToF detectors is shown.
Speaker: Tomáš SÝKORA (Institute of Particle and Nuclear Physics, Faculty of Mathematics &amp; Physics, Charles University)
• 10:50
Timing Wall Detector Project for HF CMS 20m
We propose Timing Wall Detector for HF CMS as the part of CMS Upgrade. The aim of this Detector is the suppression of pileup background and the improvement of spatial resolution of HF, which is important for HF performance in LHC high luminosity conditions. The spatial structure of Timing Wall corresponds to HF one. The element of Timing Wall consists of two parts, first part is designed for high precision timing and second is for spatial measurement with limited accuracy. The timing part is the quartz trapezoid bar rotated be the angle of Cherenkov conus. PM MCP is used as photoreadout. The spatial measurement part is a set of scintillator (LSO/GAGG) pads with quartz fiber as a lightguide, with multianode PM as a photoreadout. The time resolution better 30 ps was obtained in Test Runs. Different variants for scintillator are discussed. Special attention is paid to radiation resistance of the detector. The same approach can be applied for a detector in high pseuodorapidity region for diffraction processes study.
Speaker: Prof. Vladimir Samoylenko (IHEP-NRC "Kurchatov Institute")
• 11:10 11:30
Coffee break 20m
• 11:30 12:50
Timing detectors
Convener: Florian Brunbauer (CERN)
• 11:30
Design and first performance results of waveform sampling readout electronics for Large Area Picosecond Photodetector 20m
Large Area Picosecond Photodetectors (LAPPD) are a new generation of microchannel plate photomultipliers being manufactured by Incom. These devices feature large sensitive area of 350 cm^2, high quantum efficiency (\sim 20\%), and tens of picosecond single photon timing resolution. LAPPDs use an anode structure with 28 striplines, allowing for spatial resolution of 1-3 mm while minimizing the number of readout channels. In this report, we present our design of integrated readout electronics for the LAPPD. These electronics read out all 2x28 channels of a stripline-anode LAPPD. Waveform sampling at up to~5GSPS is performed by 8 DRS4 switched-capacitor array ASICs. All DRS4 channels are digitized in parallel with two 32-channel ADCs. An on-board FPGA coordinates digitization and readout of waveforms, and could further be expanded to include some waveform processing. Data packages built in the FPGA are sent to a DAQ system via optical fiber, with a baseline Gigabit Ethernet interface implemented entirely on the FPGA. The electronics is designed to accommodate different triggering options: self-triggering using DRS4 transparent mode and external triggering, making event control very flexible. Further flexibility is enhanced with embedded software for an on-FPGA soft-core processor, as well as DAQ readout and control software. The device is plug and play with any existing IP network. An open-source ecosystem is being developed to provide full control of the device operation and an easy way to integrate it to any environment. In the report we describe the status of the electronics development, its firmware and readout software. Also the results of the first tests of the electronics with the LAPPD devices will be presented.
Speaker: Dr Vasily Shebalin (University of Hawaii at Mano)
• 11:50
Time-of-flight system of the MultiPurpose Detector at NICA 20m
The time-of-flight method of particle identification in the MPD multi-purpose detector is one of the main methods for identifying charged hadrons in the momentum range up to 3 GeV. It is necessary that the time-of-flight system detectors have the best time resolution with an efficiency close to 100% for highly efficient registration and separation of kaons and pions with a limited time-of-flight base. A multi-gap resistive plate chamber (MRPC) with 15 gas gaps was developed for this purpose. The best time resolution of the MRPC with front-end and digitizing electronics reached 40 ps with a detection efficiency of 99%. Such a detector is fully satisfied with the technical and physical requirements of the MPD experiment. The report will present the testing results of the MRPC prototype and the results of the simulation of the properties of the time-of-flight system assembled from these detectors.
Speaker: Mr Vadim Babkin (Joint Institute for Nuclear Research)
• 12:10
Timing characterization of 3D-trench silicon sensors 20m
Future tracking detectors have to be both space and time measuring devices at the single pixel level. This is strongly motivated by the extremely high interaction intensities foreseen in the collider experiments of the next couple of decades and possibly beyond. Presently, no satisfactory technical solutions are available and important development programs have started in this direction. Minimal requirements are: the capability to sustain fluences greater than some 1016 1 MeV neq cm-2 and radiation doses of some Grad, space resolutions around 10 µm and time resolutions below 50 ps. 3D silicon sensors are well known [1] for their very high radiation hardness (some 1016 n/cm2 [2]) and have intrinsic characteristics which can be exploited for fast response. During last year, tests have been made by the TIMESPOT collaboration on developed 55-µm-pitch 3D-trench sensor prototypes, giving extraordinarily good results in terms of timing. The tests have been performed both in the laboratory under a 1030 nm pulsed laser beam and under minimum ionizing particle beam at the PSI laboratories (Paul Scherrer Institute, Villigen, Switzerland). The tests yield values of time resolution of the order and below 30 ps rms. Such results indicate that, as of today, these devices are possibly the only ones capable to satisfy the complete set of system requirements for a future vertex detector and can be considered a very interesting solution to be further developed and finalized. An optimized new batch of sensors is under development and will be submitted early 2020. This paper will describe the characteristics of the developed sensors, the kind of measurements performed and will discuss the results obtained. The ongoing activity about further 3D sensor and fast front-end electronics developments will be also briefly illustrated. [1] C. Da Via et al., 3D Silicon Sensors: Design, large area production and quality assurance for the ATLAS IBL pixel detector upgrade, NIMA vol694 Dec. 2012. [2] J. Lange et al, Radiation hardness of small-pitch 3D pixel sensors up to a fluence of 3x1016 neq/cm2, 2018 JINST 13, P09009
Speakers: Dr Adriano Lai (Istituto Nazione Fisica Nucleare (INFN) – Italy), Dr Alessandro CARDINI (INFN Sezione di Cagliari)
• 12:30
Multipurpose scintillation materials 20m
To date, more than 200 scintillation materials has been developed, however only a few of them are widely used for detectors design and construction [1]. A general trend is to use for detectors the elements produced from the selected top-quality grade scintillation materials instead of expensive novel chemically not stable halides. Another trend, which came in the last few years, is to apply new achievements from the theory of scintillation materials to engineer the properties of the materials for a particular application [2]. From that point of view, the complex oxides with garnet structure is a family of materials, for which properties can be tuned for the best price/performance ratio for a particular application. The combination of the scintillation properties, particularly the high light yield and high time resolution of garnet crystals with modern SiPM photosensors, with outstanding radiation hardness and chemical and mechanical stability make the complex garnet oxides the candidates of choice for a range of various applications in HEP experiments. Doped with Ce, the yttrium Y or Gd-based garnets could be produced by the well-established Czochralski crystal growth technique and can be produced at a quantity to equip detectors consisting of thousands and thousands of heterogeneous cells. Garnet crystals with a large quantity of Gd could be utilized for neutron detection in a large energy range. Due to its cubic crystalline structure, the garnet may be obtained as a polycrystalline ceramic using various techniques, including 3D-printing [3]; this further widens the range of the possible applications. Here we report on the series of developments, in lines with the Grant No. 14.W03.31.0004 of Russian Federation Government and Crystal Clear Collaboration at CERN, on multicationic garnet structure scintillation materials. Their prospects for an application in “shaslyk”, “spaghetti”, neutron and “mip” detectors at future HEP experiments are discussed. 1. P Lecoq, A Gektin, M Korzhik, Inorganic Scintillators for Detector Systems, Springer, 2016, p.408 2. M Korzhik, G.Tamulaitis, A.Vasil’ev, Physics of the fast phenomena in scintillators. Springer, 2020, p.350 3. G.A. Dosovitskiy et. al, CrystEngComm 19 (2017), 4260-4264
Speaker: Prof. Mikhail KORZHIK (National Research Center-Kurchatov Institute)
• 12:50 13:10
Calorimetry
• 12:50
ML-assisted versatile approach to Calorimeter R&D 20m
Advanced detector R&D for both new and ongoing experiments in HEP requires performing computationally intensive and detailed simulations as part of the detector-design optimization process. We propose a versatile approach to this task that is based on machine learning and can substitute the most computationally intensive steps of the process while retaining the GEANT4 accuracy to details. The approach covers entire detector representation from the event generation to the evaluation of the physics performance. The approach allows the use of arbitrary modules arrangement, different signal and background conditions, tunable reconstruction algorithms, and desired physics performance metrics. Being combined with properties of detector and electronics prototypes obtained from beam tests, the approach becomes even more versatile. We focus on the Phase 2 Upgrade of the LHCb Calorimeter under the requirements on operation at high luminosity. We discuss the general design of the approach, and particular estimations including occupancies and spatial resolution for the future LHCb Calorimeter setup at different pile-up conditions.
Speaker: Dr Alexey Boldyrev (National Research University Higher School of Economics)
• 13:10 14:30
Lunch or Ski 1h 20m
• 14:30 16:10
Calorimetry
Convener: Dr Yury Guz (IHEP Protvino)
• 14:30
SND electromagnetic calorimeter time measurement and its applications 20m
The SND is a non-magnetic detector deployed at the VEPP-2000 e+e- collider (BINP, Novosibirsk) for hadronic cross-section measurements in the center of mass energy region below 2 GeV. The important part of the detector is a three-layer hodoscopic electromagnetic calorimeter (EMC) based on NaI(Tl) counters. Until the recent EMC spectrometric channel upgrade, only the energy deposition measurement in counters was possible. A new EMC signal shaping and digitizing electronics based on FADC allows us to obtain also the event time structure. The new electronics and supporting software, including digital signal processing algorithms, are used for data taking in the ongoing experiment. We discuss the amplitude and time extraction algorithms, the new system performance on experimental events and physical analysis applications.
Speaker: Natalya Melnikova (BINP)
• 14:50
Performance of the Belle II Electromagnetic Calorimeter in First Data 20m
The Belle II experiment at the SuperKEKB electron-positron collider in Tsukuba, Japan began physics data taking in 2019 and will search for new physics in the flavour sector of the Standard Model as well as for dark sectors. The Belle II electromagnetic calorimeter plays a central role in photon, neutral pion and neutral hadron reconstruction, in addition to enabling advanced triggering techniques to give Belle II improved sensitivities to unique signatures of potential new physics. The calorimeter is constructed from 8736 CsI(Tl) scintillator crystals which have been equipt with new waveform sampling electronics to maintain high performance while operating in the intense beam background environment produced by SuperKEKB. This talk will present measurements of the photon and neutral pion reconstruction performance during the first physics data-taking runs of Belle II in addition to results of the first application of CsI(Tl) pulse shape discrimination at a B-Factory experiment. Through the application of pulse shape discrimination, it will be demonstrated that improvements are achieved in challenging and important areas of particle identification such as neutral hadron vs. photon identification and low momentum charged particle identification.
Speaker: Savino Longo (DESY)
• 15:10
Final design of the mu2e crystals calorimeter 20m
The Mu2e experiment at Fermilab will search for the charged-lepton flavour violating neutrino-less conversion of a negative muon into an electron in the field of an aluminum nucleus. The Mu2e detector is composed of a tracker and an electromagnetic calorimeter and an external veto for cosmic rays. The calorimeter plays an important role in providing excellent particle identification capabilities, a fast online trigger filter while aiding the track reconstruction capabilities. The calorimeter requirements are to provide a large acceptance for ~100 MeV electrons and reach: 1) a time resolution better than 0.5 ns; 2) an energy resolution O(10%); 3) a position resolution of 1 cm. The calorimeter consists of two disks, each one made of 674 pure CsI crystals readout by two large area 2x3 array of UV-extended SiPMs of 6x6 mm^2 dimensions. A large scale prototype has also been constructed and tested at the beam test facility in Frascati. It consists of 51 pre-production crystals readout by a 102 SiPM. All the test and progresses done to define the calorimeter design, the satisfying results obtained with the test beam of the prototype as well as the current production phase will be presented. At the moment, all the components for the first disk has been characterized. The construction starting is planned for spring 2020.
Speaker: Dr Raffaella Donghia (National Laboratories of Frascati of INFN)
• 15:30
AMoRE- an experiment searching for neutrinoless double beta decay using molybdate crystals and cryogenic detectors 20m
The AMoRE (Advanced Molybdenum based Rare process Experiment) is an experiment searching for neutrinoless double beta decay of Mo-100 in molybdate based crystal scintillators using a cryogenic detection technique. The crystals are equipped with metallic magnetic calorimeter (MMC) sensors for detection of both phonon and photon signals at temperatures of few tens of mK. Simultaneous measurements of thermal and scintillation signals produced by a particle interaction in crystals by the MMC sensors provide high energy resolution and efficient particle discrimination. The AMoRE-pilot, an R&D phase with six 48deplCa100MoO4 crystals and a total mass of ~1.9 kg in the final configuration, was running at the 700-m-deep Yangyang underground laboratory (Y2L). After completion of the AMoRE-pilot run in the end of 2018, the AMoRE-I is being prepared with ~6 kg of crystals, thirteen 48deplCa100MoO4 and five Li2100MoO4, to be installed at the Y2L by January 2020. We have secured 110 kg of Mo-100 isotopes for production of the AMoRE-II crystals. The AMoRE-II with ~200 kg of molybdate crystals will be running at the Yemilab, new underground laboratory located ~1,100 m deep at Handeok iron mine and being excavated from March 2019 for a completion by the end of 2020. The AMoRE-II is expected to improve upper limit of effective Majorana neutrino mass down to the level of inverted hierarchy region of the neutrino mass, 20-50 meV, when no such decays are observed. Results of the AMoRE-pilot and progress of the AMoRE-I and AMoRE-II preparation will be presented.
Speaker: Dr Moo Hyun Lee (Center for Underground Physics, Institute for Basic Science (IBS))
• 15:50
Change of SiPM parameters after very high neutron irradiation. 20m
Recently developed high dynamic range Hamamatsu and FBK SiPMs were irradiated with reactor neutrons at JSI (Ljubljana) up to 2*10^14 n/cm^2 (1 MeV equivalent). Parameters of the irradiated SiPMs were studied using continuous and pulsed light illumination. In this presentation we report about change of SiPMs PDE, gain, dark current, noise and breakdown voltage after irradiation.
Speaker: Dr Yury Musienko (University of Notre Dame (Notre Dame)/INR RAS (Moscow))
• 16:10 16:40
Coffee break 30m
• 16:40 19:00
Calorimetry
Convener: Prof. Mikhail Korzhik (National Research Center-Kurchatov Institute)
• 16:40
Performance study of a compact LumiCal prototype in an electron beam 20m
The FCAL collaboration is preparing large-scale prototypes of special calorimeters to be used in the very forward region at a future electron-positron collider for a precise and fast luminosity measurement and beam-tuning. LumiCal is designed as silicon-tungsten sandwich calorimeter with very thin sensor planes to keep the Moliere radius small, facilitating such the measurement of electron showers in the presence of background. Dedicated FE electronics has been developed to match the timing and dynamic range requirements. A partially instrumented prototype was investigated in a 1 to 5 GeV electron beam at the DESY II synchrotron. Sixteen thin detector planes fully assembled with readout electronics were installed in 1 mm gaps between tungsten plates of one radiation length thickness. High statistics data were used to perform sensor alignment, and to measure the longitudinal and transversal shower development in the sandwich. In addition, Geant4 MC simulations were done and compared to the data.
Speaker: Dr Mikhail Gostkin (JINR)
• 17:00
CALICE highly granular calorimeters: imaging properties for hadronic shower analysis 20m
The CALICE collaboration pioneered the new trend in calorimetry - highly granular devices for high energy and particle physics applications. During the last fifteen years, several highly granular electromagnetic and hadron calorimeters based on different technologies were constructed and successfully tested. These comprise optical readout, signal collection with semi-conducting devices and gaseous detectors. All current CALICE prototypes address technological aspects such as embedded electronics. The results of beam tests with the various calorimeter prototypes will be presented. The MIP calibration and monitoring, calorimeter-based particle identification and comparison of different operation modes will be discussed.
Speaker: Dr Marina Chadeeva (P.N. Lebedev Physical Institute of the RAS)
• 17:20
CMS ECAL monitoring and its upgrade for High-Luminosity LHC 20m
The Compact Muon Solenoid (CMS) detector is a large general-purpose detector at the Large Hadron Collider (LHC). The Electromagnetic Calorimeter (ECAL) is an important part of CMS to accurately measure the energies of electrons and photons. The ECAL is made of 75848 lead-tungstate (PbWO4) scintillating crystals. The ECAL response changes over time mainly because of crystal transparency variations due to radiation damage and recovery. The laser monitoring system is designed to measure the transparency changes for each ECAL crystal over time. High-Luminosity running at the LHC, which is planned for 2025 and beyond, will imply an order of magnitude increase in radiation levels and particle fluences with respect to the present LHC running conditions. The mitigation of aging is an important goal for the upgrade of the laser light monitoring system. This talk describes the evolution the transparency of the ECAL crystals in Run 2 data, the components of the ECAL monitoring system, and its proposed upgrade.
Speaker: Mr Ivan Ovtin (NSU, BINP)
• 17:40
The Phase 2 Upgrade of the LHCb Calorimeter system. 20m
The purpose of the Phase 2 LHCb Upgrade is to make it able to work at luminosity of $(1..2)*10^{34} cm^{-2}s^{-1}$. The plan is to collect ~300 $fb^{-1}$ of data during 3-5 years. The Phase 2 Upgrade will require a major revision of the LHCb Calorimeter system. The increased instantaneous and integrated luminosity will result in very high particle density and radiation doses in the central area of the detector. In these conditions, ECAL has to provide high quality energy and position measurement for electromagnetic showers, as well as separation of two closely lying showers. The choice for the central part of ECAL can be a sampling scintillation calorimeter with dense tungsten-based converter. The radiation hard crystal scintillators, like GAGG:Ce or YAG:Ce, can be used as active elements. The peripheral areas with moderate radiation doses can be instrumented with calorimeter modules based on plastic scintillator. Another requirement for the LHCb Phase 2 Upgrade ECAL is the ability to measure the time of arrival of the photon or electron with an accuracy of few tens of picosecond. At high luminosity, such time measurement is a powerful tool helping to correctly assign electromagnetic showers to primary vertices. A dedicated timing layer in front of ECAL can be used for time measurements; another option is to use the "intrinsic" time resolution of the ECAL modules. An R&D campaign was started to optimize the Upgrade 2 ECAL structure. It includes: - studies of scintillating materials, in particular irradiation measurements; - beam test studies of the performance of various ECAL module prototypes, both for central and peripheral areas; - simulation studies to find the optimal detector layout. In this talk we present the R&D results and the current status of the LHCb Calorimeter upgrade.
Speaker: Dr Yury Guz (IHEP Protvino)
• 18:00
ATLAS LAr Calorimeter Performance in LHC Run-2 20m
Liquid argon (LAr) sampling calorimeters are employed by ATLAS for all electromagnetic calorimetry in the pseudo-rapidity region |η| < 3.2, and for hadronic and forward calorimetry in the region from |η| = 1.5 to |η| = 4.9. In the first LHC run a total luminosity of 27 fb−1 has been collected at center-of-mass energies of 7-8 TeV. After detector consolidation during a long shutdown, Run-2 started in 2015 and about 150fb-1 of data at a center-of-mass energy of 13 TeV have been recorded. In order to realize the level-1 acceptance rate of 100 kHz in Run-2 data taking, the number of read-out samples recorded and used for the energy and the time measurement has been modified from five to four while keeping the expected performance. The well calibrated and highly granular LAr Calorimeter reached its design values both in energy measurement as well as in direction resolution. This contribution will give an overview of the detector operation, hardware improvements, changes in the monitoring and data quality procedures, to cope with increased pileup, as well as the achieved performance, including the calibration and stability of the electromagnetic scale, noise level, response uniformity and time resolution.
Speaker: Mr Devin Mahon (Columbia University)
• 18:20
Performance of the ATLAS Tile Calorimeter 20m
The Tile Calorimeter (TileCal) is a sampling hadronic calorimeter covering the central region of the ATLAS experiment, with steel as absorber and plastic scintillators as active medium. The scintillators are read out by wavelength shifting fibres to photomultiplier tubes (PMTs) at the back of each wedge-shaped calorimeter module. The analogue signals from the PMTs are amplified, shaped, and digitised on the detector every 25 ns, and stored on detector in digital pipeline buffers until a trigger decision is received. The data are then read out to the off-detector systems for further processing. TileCal employs several calibration systems that, together with the collected collision data, provide the basis for response equalisation and monitoring at each stage of the readout path; from scintillation light production to energy and time reconstruction. Furthermore, the calorimeter performance has been established with large samples of proton-proton collision data during LHC Run 1 and Run 2. The high-momentum isolated muons have been used to study and validate the electromagnetic scale, while hadronic response has been probed with isolated hadrons. The calorimeter time resolution has been studied with multi-jet events. We present and summarise results of the calorimeter calibration and performance.
Speaker: Mr Mpho GOLOLO (University of the Witwatersrand)
• 18:40
Upgrade of the ATLAS Hadronic Tile Calorimeter for the High Luminosity LHC 20m
Speaker: Ms Tamar ZAKAREISHVILI (High Energy Physics Institute of Tbilisi State University)
• Thursday, 27 February
• 09:00 11:00
Instrumentation for Astroparticle and Neutrino physics
Convener: Dr Hiroyuki Sagawa (Institute for Cosmic Ray Research, the University of Tokyo)
• 09:00
TAIGA - an advanced hybrid detector complex for astroparticle physics and high energy gamma-ray astronomy in the Tunka valley. 20m
The physics motivations and advantages of the new TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) array are presented. TAIGA aims to addresses gamma-ray astronomy at energies from a few TeV to several PeV, cosmic ray physics from 100 TeV to several EeV. as well as for search for axion-like particles, Lorentz violations and another evidence of New Physics. In 2020 year a one square kilometer TAIGA setup should be put in operation. It will consist of a Cherenkov timing array TAIGA-HiSCORE with the 120 wide angle detectors distributed on area 1 km^2 about with spacing 106 m, three a 4-m class Imaging Atmospheric Cherenkov Telescopes of a TAIGA-IACT array of FoV of 10x10 in the vertexes of triangle with sides 300 x 400 x 500 m about as well TAIGA-Muon and Tunka-Grande scintillation arrays.
Speaker: Prof. Nikolay Budnev (Irkutsk State University)
• 09:20
Hyper-Kamiokande 20m
Hyper-Kamiokande is a next generation large-scale water Cherenkov detector. Its fiducial volume will be about an order of magnitude larger than Super-Kamiokande and the detector performance is significantly improved with newly developed photo-sensors. Combination of the Hyper-Kamiokande detector with the upgraded J-PARC neutrino beam will provide unprecedented high statistics of the neutrino and antineutrino signals to measure the CP violation and reveal a full picture of neutrino mixing with high precision. A set of upgraded and new near detectors will be used to control the systematic uncertainties. In addition to detecting the neutrino beam from J-PARC, the Hyper-Kamiokande detector will be used to search for proton decays, to study atmosphetic and solar neutrinos, and to detect supernova and other astrophysical neutrinos. The construction of Hyper-Kamiokande is going to start in early 2020, with expectation of starting operation in 2027. The design and expected performance of the detectors and the status of project will be presented.
Speaker: Prof. Yury Kudenko (Institute for Nuclear Research)
• 09:40
Development of a 3D highly granular scintillator neutrino detector for the T2K experiment 20m
The long baseline neutrino experiment T2K has launched the upgrade project of its near detector ND280, crucial to reduce the systematic uncertainty in the prediction of number of events at the far detector to less than 4%. An essential component of this upgrade is a highly segmented scintillator detector, acting as a fully active target for the neutrino interactions. We adopt a novel design, called SuperFGD, with dimensions of ~200x180x60 cm^3 and a total mass of about 2 tons. It consists of about 2x106 small scintillator cubes each of 1 cm3. Each cube is covered by a chemical reflector and has three orthogonal cylindrical holes of 1.5 mm diameter. The signal readout from each cube is provided by wavelength shifting fibers inserted in these holes and connected to micro-pixel avalanche photodiodes MPPCs. The front-end electronics will be based on the CITIROC chip designed for the multi-channel readout of SiPM. The total number of channels will be ~60,000. We have demonstrated that this detector, providing three 2D projections, has excellent tracking performance, including a $4 \pi$ angular acceptance, especially important for short proton and pion tracks. Prototypes of this detector have been tested in a beam of charged particles at CERN in 2017-2018 and recently with a neutron beam at LANL in 2019. The project has been approved by CERN as part of the Neutrino Platform (NP07). In this talk, we will report on the design of this detector, its expected performance, the results of the test beams and the plan for the construction.
Speaker: Mr Sergei Fedotov (Institute for Nuclear Research of the Russian Academy of Sciences)
• 10:00
Neutrinoless double beta decay searches: gearing up for the tonne-scale era 30m
The nature of the neutrino, namely whether it is a Dirac or Majorana fermion, is a key question with far-reaching implications in particle physics and cosmology. The most sensitive experimental probe in this respect is the search for neutrinoless double beta decay ($\beta\beta 0\nu$), which can only occur if the neutrino is its own antiparticle. A positive detection will provide a first demonstration of lepton number violation, as well as support for theories beyond the Standard Model explaining the origin and smallness of the neutrino mass, and the generation of matter-antimatter asymmetry in the Universe via leptogenesis. The importance of $\beta\beta 0\nu$ detection on the one hand, and the availability of promising experimental schemes with already proven results on the other, motivate an international, well-funded, multi-isotope approach. A number of experiments have already constrained the $\beta\beta 0\nu$ half-life to $10^{25}-10^{26}$ years, employing masses of $\beta\beta 0\nu$ isotopes of tens to hundreds of kg. If one assumes that the underlying mechanism for $\beta\beta 0\nu$ is the exchange of light Majorana neutrinos, this corresponds to excluding effective Majorana neutrino masses slightly above the inverted mass-ordering band in the neutrino mass parameter space. The next generation of experiments aims to fully explore the inverted mass ordering region, which requires sensitivities to half-lives of the order of $10^{27}-10^{28}$ years. This, in turn, necessitates tonne-scale masses of the $\beta\beta 0\nu$ isotopes and an order-of-magnitude improvement in background rejection. This talk will review the different technologies employed by the main $\beta\beta 0\nu$ experiments, their present status and plans for tonne-scale searches, discussing, in particular, their key merits and respective challenges.
Speaker: Dr Lior Arazi (Ben-Gurion University of the Negev)
• 10:30
The DarkSide project, its past, present and future steps. 30m
The DarkSide is a scientific project based on the dual-phase Liquid Argon Time Projection Chamber technology with the goal of direct search for the WIMP dark matter. This talk will give an update of the present status of the project and its future steps. Latest results from the DarkSide-50, the fist detector of the DarkSide family dedicated to the scientific run will be briefly described. The detector was built at Gran Sasso Underground Laboratory (LNGS, Italy), filled with 150kg of low radioactivity underground argon and is in data taking since mid of 2015. The next step of the DarkSide program is a new generation experiment, Darkside-20k, lead by a global collaboration formed by the present Argon based direct DM detection experiments and will also be located at LNGS. The DarkSide-20k, is a 20-tonne fiducial mass acrylic TPC with SiPM based photosensors, is designed to have a background well below that from coherent scattering of solar and atmospheric neutrinos and heading to explore the region of a WIMP-nucleon cross section of $10^{-47}$ cm$^2$ for a WIMP mass of 1TeV/c$^2$ in a 5 yr run. The ReD experiment is a lab scale new type TPC containing all technical solutions to be implemented in Darkside-20k was assembled in Naples University of Federico II with the goal of the directionality study in LAr. Its current status and plans will also be presented in this talk.
Speaker: Dr Yury Suvorov (University of Naples Federico II, Napoli)
• 11:00 11:30
Coffee break 30m
• 11:30 13:00
Instrumentation for Astroparticle and Neutrino physics
Convener: Prof. Yury Kudenko (INR)
• 11:30
Measurements of argon-scintillation and -electroluminescence properties for low mass WIMP dark matter search 30m
An argon scintillation detector has several features that make it attractive for use in various physics projects such as WIMP dark matter search. The detector observes scintillation and/or electroluminescence signals. The main features of the detector are: efficient conversion of energy deposition into observables: powerful particle identification by use of scintillation pulse shape and ionization to scintillation ratio: and scalability and cost efficiency due to the availability of argon. In these projects, comprehensive understanding of the detector property is crucial to reduce systematical uncertainties and improve the physics sensitivity. This talk covers the recent measurements of the argon properties, with a primary focus on the electroluminescence signal. Basic properties of the gas argon luminescence signal are measured using a dedicated gas argon time projection chamber. Based on this measurement, we discuss the luminescence process of the signal, such as a theoretically predicted mechanism called “neutral bremsstrahlung”. In addition, we present several measurements of the liquid argon response, namely, scintillation and ionization yields under high electric field and energy dependence of the argon response. Recent development of the liquid argon scintillation detector for low mass dark matter search is also introduced, which is relatively small but achieves the world-highest light collection efficiency.
Speaker: Mr Masato Kimura (Waseda University)
• 12:00
Observation of unusual slow components in electroluminescence signal of two-phase argon detector 20m
Proportional electroluminescence (EL) in noble gases is used in two-phase detectors for dark matter search to record ionization signals in the gas phase induced by particle scattering in the liquid phase (S2 signals). In this work, the EL pulse shapes in a two-phase argon detector have for the first time been studied systematically in a wide electric field range varying from 3 to 9 Td. The pulse shapes were studied at different readout configurations and spectral ranges: using cryogenic PMTs and SiPMs, with and without a wavelength shifter (WLS), in the VUV and visible range. We observed the fast component and two unusual slow components, with time constants of about 5 $\mu$s and 70 $\mu$s. The unusual characteristic property of slow components was that their contribution increased with field. We also show that the fast component may be used to measure the EL gap thickness with sub-mm resolution. The results obtained can have practical applications in DarkSide dark matter search experiment.
Speaker: Mr Egor Frolov (Budker Institute of Nuclear Physics SB RAS)
• 12:20
The RED-100 experiment. 20m
The RED-100 is a two-phase xenon emission detector built to study the recently discovered rare process of coherent elastic neutrino-nucleus scattering CEvNS. The detector contains ~200 kg of liquid xenon inside a cryostat, with ~100 kg in fiducial volume. The detector is sensitive to the very small level of ionization, down to single ionization electrons. First laboratory tests of the RED-100 detector has been carried out. The results are presented. The detector is planned to be installed at the Kalinin Nuclear Power Plant.
Speaker: Dr Dmitry Akimov (ITEP and MEPhI)
• 12:40
The COHERENT experiment with LAr 20m
Coherent elastic neutrino-nucleus scattering (CEvNS) is recently discovered process by the COHERENT collaboration at the SNS accelerator facility (ORNL, USA). A short overview of the COHERENT multi-detector experiment, with the focus on the liquid argon CENNS-10 detector, is given. Data analysis of CENNS-10 science run is presented. Further LAr program at SNS is discussed.
Speaker: Mr Alexander Kumpan (NRNU MEPhI)
• 13:00 14:20
Lunch or Ski 1h 20m
• 14:20 16:10
Particle Identification
Convener: Dr Jochen Schwiening (GSI)
• 14:20
Recent advances in particle identification methods 30m
The review will report on recent advances in particle identification methods in particle physics. We will discuss identification methods that are based on Cherenkov radiation and exploit the measurement of Cherenkov angle as well as the time of propagation of Cherenkov photons. We will also explore advances in transition radiation detectors and time-of-flight systems. We will discuss the detectors of the currently operating experiments and the research and development for future projects. Reference will also be made to developments that are potentially interesting for instrumentation in medical imaging.
Speaker: Dr Peter Krizan (JSI and University of Ljubljana)
• 14:50
The Barrel and Endcap Disc DIRC at PANDA 20m
The PANDA experiment of the FAIR facility will address open questions in hadron physics using antiproton beams in the momentum range of 1.5-15 GeV/c. The antiprotons are stored and cooled in the High Energy Storage Ring (HESR) and allow high precision spectroscopy in the energy range of closed and open charm. Two Cherenkov detectors using the principle of Detection of Internally Reflected Cherenkov light (DIRC) will provide excellent PID in the PANDA target spectrometer. The Endcap Disc DIRC separates pions from kaons better than 3σ up to momenta of 4 GeV/c in the forward direction, for polar angles from 5∘ to 22∘. It uses a fused silica radiator disk, consisting of four optically isolated quadrants. The Cherenkov photons are imaged on Microchannel-Plate PMTs (MCP-PMTs) by focusing lightguides. The Barrel DIRC cleanly separates pions from kaons for polar angles in the range of 22∘ - 140∘ and momenta up to 3.5 GeV/c. The barrel is formed by 16 sectors, each comprising three narrow fused silica radiator bars, with a flat mirror attached to one end and a spherical lens attached to the other, and a large fuse silica prism, coupled to each group of three lenses. The Cherenkov light is focused on the back side of the prism, where an array of lifetime-enhanced MCP-PMTs detects the photons. The designs are simulated and validated in test beams with prototypes and the Technical Design Reports of both devices have recently been completed. While mass production of some of the components has already started, the R&D for other important items, like the readout electronics or the shape and materials of the mechanical support, is still ongoing. This talk describes the status of the two DIRC projects and will discuss the remaining R&D activities.
Speaker: Mr Carsten Schwarz (GSI Helmholtzzentrum GmbH)
• 15:10
The Upgrade of the LHCb RICH System for the LHC Run 3 20m
The RICH detectors of the LHCb experiment have provided particle identification with excellent performance during Run 1 and 2 of the LHC. Currently the LHCb experiment is undergoing an upgrade to allow, starting from 2021, data collection at 5 times the instantaneous luminosity of the period 2010-2019 (up to $2 \times 10^{34}cm^{-2} s^{-2}$ ) with the aim to collect 50 fb$^{-1}$. The required upgrades to detectors and electronics are significant, with the RICH system changing all of the photon detectors and a full replacement of the upstream RICH detector. The existing Hybrid Photon Detectors (HPD) are being replaced by two types of Multi-Anode Photomultiplier Tubes (MaPMT) plus electronics capable of recording data at the full LHC collision frequency of 40 MHz. The required 3072 MaPMTs have been received from the manufacturer and have undergone detailed characterisation, measuring gain and uniformity across channels plus quantum efficiency on a smaller sample. The MaPMTs and associated electronics are currently being mounted on their mechanical support structures, and about half are ready for installation in the early part of 2020. The upstream RICH detector is also ready for the installation of the new optical elements. The status of the project will be presented.
Speaker: Dr Antonios Papanestis (STFC - RAL)
• 15:30
Performance of the Belle II Aerogel-Based Ring-Imaging Cherenkov counter system in SuperKEKB 2019 Phase 3 operation 20m
The Belle II experiment with SuperKEKB beam collision has started since 2018. The physics target of the experiment is to improve measurement of rare B meson decays with better and higher luminosity. An aerogel-based proximity focusing ring-imaging Cherenkov (ARICH) counter is utilized for charged particle identification (PID) in the forward end-cap region. For the study of CP violation involved in B decays, the goal is to separate kaons from pions up to and above 4σ for momenta up to 4 GeV/c. The counter is made of aerogel tiles to generate Cherenkov photons, and a 144-channel Hybrid Avalanche Photo Detector (HAPD) is adopted as a photo-detector. The HAPD signal is digitized by using the Application Specific Integrated Circuit (ASICs). Two different types of Field Programmable Gate Array (FPGA) boards are responsible for data processing and acquisition. In the Phase 3 (SuperKEKB beam collision from Apr. to Dec. 2019), the ARICH system have been operating smoothly, and software algorithm has been validated with the data as well. We will present the status of the entire hardware system during Phase 3 operation and the preliminary result of PID performance.
Speaker: Dr Yun-Tsung Lai (KEK)
• 15:50
Operational Status of the Belle II Time-of-Propagation (TOP) Detector 20m
Data taking with the Belle II detector at the SuperKEKB electron-positron collider in Japan started in April 2018 with low luminosity. During the second stage of data-taking, which started in March 2019, SuperKEKB has reached the luminosity of 1.05\times10^{34}cm^{-2}s^{-1} and Belle II collected about 10~fb^{-1} of integrated luminosity, moving towards the design luminosity of 5\times10^{35} cm^{-2}s^{-1}. Particle identification in the barrel region is provided by the Time-Of-Propagation(TOP) detector. The device consists of 16 bars of fused silica which serve as a source of Cherenkov photons and as a light guide at the same time. A unique feature of the detector is that particle identification is based on the combined measurement of the time-of-flight and Cherenkov angle using the precise arrival times of detected photons and their spatial distribution. To achieve good pion-kaon separation the photon arrival times must be measured with a resolution of approximately 100 ps or better. Microchannel plate photomultipliers together with dedicated high-speed electronics for 2.7 GSa/s waveform sampling are used to achieve this timing resolution in a total of 8192 channels. In this report we give an overview of the TOP detector system, present the current status of its operation and plans toward the high occupancy conditions expected at the design luminosity of the SuperKEKB collider.
Speaker: Dr Vasily Shebalin (University of Hawaii at Manoa)
• 16:10 16:30
Coffee break 20m
• 16:30 18:10
Particle Identification
Convener: Dr Evgeniy Kravchenko (BINP/NSU)
• 16:30
GlueX DIRC at JLab 20m
The GlueX experiment at Jefferson Laboratory aims to perform quantitative tests of non-perturbative QCD through hadronic spectroscopy (mainly using light-quark mesons and baryons). The recently installed Detection of Internally Reflected Cherenkov light (DIRC) detector is an important addition to the particle identification (PID) package of GlueX and is a crucial element for carrying out the full GlueX physics program. The DIRC is designed to provide clean pi/K separation up to 4 GeV/c momenta in the forward region (theta<11 deg from the beam). This capability will enable us to explore the s-sbar hybrid meson states which decay into final states with charged kaons. The DIRC system is constructed using long quartz radiators from decommissioned BaBar experiment combined with new compact photon sensors based on SuperB FDIRC concept. This system was fully installed in Oct 2019, and commissioned with beam during 4 weeks in Dec 2019. In this presentation we will be discussing the construction and commissioning of the DIRC system, as well as the performance of the detector compared to expectation.
Speakers: Dr Jochen Schwiening (GSI), Dr Wenliang Li (College of William and Mary)
• 16:50
MPGD-based photon detectors for the upgrade of COMPASS RICH-1 and beyond 20m
After pioneering gaseous detectors of single photon for RICH applications using solid state Photo Cathodes (PC) within the RD26 collaboration and by the realization of the MWPCs with CsI PC for the RICH detector of the COMPASS experiment at CERN SPS, in 2016 we have upgraded COMPASS RICH by novel gaseous photon detectors based on MPGD technology. Four new photon detectors, covering a total active area of 1.5 square m, have been installed in order to cope with the challenging efficiency and stability requirements of the COMPASS physics programme. The new detector architecture consists in a hybrid MPGD combination: two layers of THGEMs, the first of which also acts as a reflective PC thanks to CsI coating, are coupled to a bulk Micromegas on a pad-segmented anode; the signals are read-out by analog F-E based on the APV-25 chip. These detectors are the first application in an experiment of MPGD-based single photon detectors. Presently, we are further developing the MPGD-based PDs to make them adequate for setups at the future EIC collider. A compact collider setup imposes to construct a RICH with a short radiator length, hence limiting the number of photons. The last can be increased by detecting the photons in the far UV region. However, as standard fused-silica windows are opaque below 165 nm, a windowless RICH approach represents a possible choice. Another challenge is the need of improved space resolution, related to the shorter lever arm. All aspects of the COMPASS RICH-1 Photon Detectors upgrade are presented, including R&D, engineering, mass production, quality assessment and performance as well as the on-going development for collider application.
Speaker: Dr Shuddha Shankar Dasgupta (Post Doc Researcher)
• 17:10
Design, Performance and Perspective of NA62-RICH at CERN 20m
NA62-RICH is the Ring Imaging CHerenkov detector of the NA62 experiment designed to measure the branching fraction of the ultra-rare decay of a charged kaon in a charged pion and two neutrinos. The experiment started in 2016 and is going to conclude the main measurement by 2025. RICH sub-detector plays a fundamental role in NA62 by providing timing and multiplicity information to the global trigger system. It is also crucial for offline analysis with a single event time resolution of 70 ps and a muon misidentification of less than $10^{-2}$. NA62-RICH utilizes 1952 PMTs (Hamamatsu R7400) on a 1 squared meter photodetection surface. Single photoelectron signals are fed into custom frontend boards equipped with NINO ASICs and then to TDC cards within the TEL62 TDAQ system. Detector design and current performance are presented. In a long term prospect (>2026) NA62 is considering the possibility to increase the nominal beam intensity by a factor 4 and RICH time resolution must scale accordingly.
Speaker: Mr Matteo Turisini (INFN)
• 17:30
Development of Compact, Projective and Modular Ring Imaging Cherenkov Detector for Particle Identification in EIC Experiments 20m
The recent announcement of the construction of an Electron Ion Collider (EIC) at Brookhaven National Laboratory by the U.S. Department of Energy makes the reality of a long-sought experimental effort to explore the structure and properties of proton and nuclei in unprecedented precision and broad kinematic coverage. Particle identification (PID) of the final state hadrons is a key requirement for EIC. In order to meet the challenge of the confined volume of the electron endcap in EIC experiments, a compact, projective, and modular ring imaging Cherenkov (mRICH) detector is proposed for $K/\pi$ separation from $3$ up to $10$~GeV/c. At the same time, the mRICH design has a significant potential for $e/\pi$ identification providing an important capability supplementing the electromagnetic calorimeters and other possible $e/\pi$ PID systems. The mRICH detector consists of an aerogel radiator block, a Fresnel lens, a mirror-wall and a photosensor plane. The first prototype of this detector design was successfully tested at Fermi National Accelerator Laboratory in April 2016 for verifying the detector working principles. This talk will highlight the recent advances and the beam test results of the second mRICH prototype in 2018. A future plan for the mRICH development will also be discussed in this presentation.
Speakers: Dr Jochen Schwiening (GSI), Prof. Xiaochun He (Georgia State University, EIC PID Consortium - eRD14 Collaboration)
• 17:50
Identification of ultrahigh energy extensive air showers with Taiga-Muon installation 20m
The TAIGA astroparticle observatory is under the construction at Tunka valley close to the Baikal Lake. Up to now it consists of 2 imaging air Cherenkov telescopes, about 100 wide-angle optical detectors, and 19 stations with 342 scintillation detectors. In 2019, the existing system of scintillation detector stations was extended with 3 stations of the new type Taiga-Muon counters. Each station contains 16 counters, with 8 surface and 8 underground counters. The counter and station positioning has been studied using specially developed Monte Carlo simulation program based on of CORSIKA and GEANT4 software packages. This simulation study is concentrated on the ultrahigh energy extensive air showers (EAS) induced by gamma-quanta or proton in the range from 1 PeV to 10 PeV and zenith angle ranging 00 - 450. The simulation results are analyzed with the help of neural network. For this work, a set of air showers was created by CORSIKA. The list of useful secondary particles at the ground level is produced using the COAST library package. The interaction of secondary particles with the soil and detectors was simulated with GEANT4 package. It is known, that the lateral distributions of particle density in gamma-quanta and proton EAS are different at the ground level. Also the density of muons is different. To use both these characteristics for separation of gamma-quanta from proton we suggest using a neural network. The method called binary cross entropy was studied. Amplitudes in surface and underground counters of each station were given as input data. The air shower having energy ranging 2.25 - 3.5 PeV shows more than 90% of identification efficiency for proton by keeping identification efficiency of gamma around 50%.
Speaker: Mr Arun Vaidyanathan (PhD Student)
• 18:10 19:00
Poster Session
• 19:30 23:00
Conference Dinner 3h 30m

19:00, 19:15 - bus to the restaurant ,
19:30 - 23:00 Conference Dinner ,
23:00 - bus to the Park Wood Hotel

• Friday, 28 February
• 09:00 11:10
Micropattern gas detectors
Convener: Dr Giovanni Bencivenni (LNF - INFN)
• 09:00
Review on the R&D activities within the RD51 Collaboration 30m
Recent advances in photolithography and micro processing techniques have enabled the emergence of Micro Pattern Gaseous Detectors (MPGDs) such as Gas Electron Multipliers (GEMs) or Micro Mesh Gaseous Structures (Micromegas) and many other more recent technologies. These new technologies combine the gas amplification principle of gaseous detectors with micro-structure printed circuits technologies to provide a wide variety of high rate particle tracking detectors with excellent space and time resolution, high radiation tolerance, low material and large material capabilities. The RD51 collaboration is a CERN based international collaboration dedicated to the development and advancement of the MPGDs technologies for application in both basic and applied research and beyond. The RD51 collaboration, which aims at bringing the experts in the field together, is structured into working groups that cover several R&D areas including the emergence of new structures, technologies and applications, detector characterization, large scale production and test facilities, simulations studies, software development and most importantly the development of associated readout electronics. In this talk, we will give a brief and comprehensive overview of the RD51 collaboration and MPGDs-related detector development and R&D. In a second part of the talk, we will be present the newly emerging US-based MPGD communities and the ongoing R&D activities for future colliders and fixed target experiments. Finally, future RD51 projects and plans will be summarized.
Speaker: Dr Kondo GNANVO (University of Virginia)
• 09:30
Production and installation of first GEM station in CMS 20m
In December 2018 the Large Hadron Collider (LHC) entered the LS2 phase (Long Shutdown 2), which will last until beginning of 2021: in this period a maintainance program of LHC and of the other smaller accelerators is scheduled. In 2017 and during the whole 2018 LHC has reached the record beam luminosity 2 x 10^34 cm^-2 s^-1, around a factor of 2 beyond the LHC design. To cope with this and also looking at the following LHC phase, in which the luminosity will be further increased up to a factor 5-7, the same LHC experiments must be upgraded. In this context and concerning the muon subsystem, the CMS experiment began installing the first GEM based detectors station ( GE1/1) in July 2019 almost 5 meters from the point of interaction and covering the pseudorapidity region 1.6 < eta < 2.15. GE1/1 will consist of 144 Triple Gas Electron Multiplier detectors (GEM): this station is designed to work together with the Cathode Strip Chamber (CSC) station ME1/1, improving tracking and triggering of muons produced with the pseudorapidity covered by these stations. The installation in CMS is now underway at a good pace: the first 72 chambers have been installed together with their services (gas, cooling, low voltage and high voltage), while the completion of the station is foreseen in spring 2020. This contribution will analyze the detector design, moving then to all the steps a detector must pass before being approved for the installation in CMS. The status of the operations will be presented, together with the tools developed to monitor the detector parameters during installation. Finally the plans for the installation and commissioning of the entire project will be outlined.
Speaker: Mr Simone Calzaferri (Università degli Studi di Pavia)
• 09:50
The Micromegas chambers for the ATLAS New Small Wheel upgrade 20m
The ATLAS collaboration at LHC has chosenthe resistive Micromegas technology, along with the small-strip Thin Gap Chambers (sTGC), for the high luminosity upgrade of the first muon station in the high-rapidity region, the so called New Small Wheel (NSW) project. After the R&D, design and prototyping phase, the series production Micromegas quadruplets are being constructed at the involved construction sites in France, Germany, Italy, Russia and Greece.At CERN, the final validation and the integration of the modules in Sectors are in progress.These are big steps forward for the installation of the first NSW, the NSW-A foreseen for the LHC long shutdown in 2020. The construction of the four types of large size quadruplets, all having trapezoidal shapes with surface areas between 2 and 3 m2, will be reviewed. The achievement of the requirements for these detectors revealed to be even more challenging than expected, when scaling from the small prototypes to the large dimensions. We will describe the encountered problems, to a large extent common to other micro-pattern gaseous detectors, and the adopted solutions. Final quality assessment and validation results on the achieved mechanical precision, on the High-Voltage stability during operation with and without irradiation will be presented together with the most relevant steps and results of the modules integration into sectors.
Speaker: Dr Ivan Gnesi (CERN, Fermi Center)
• 10:10
Development of compact micro-pattern gaseous detectors for application to the CEPC digital hadron calorimeter 20m remote (zoom)

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Speaker: Mr Daojin Hong (University of Science and Technology of China)
• 10:30
Study of resistive materials for MPGD protection 20m
CERN Micro Pattern Technologies workshop (CERN EP/DT/EF) is currently involved in one MPGD R&D project: “Study of resistive materials for MPGD protection”, this study is conduct in the framework of RD51 collaboration. A group of four institutes has been raised (Kobe, INFN Frascati, China and CERN) to address all the different aspects of this topic. The role of CERN MPT workshop in the group is the development and production of new MPGD devices based on DLC layers developed and produced in Japan (Kobe B/Sputter) and China (HEFEI). Several types of MPGDs have already been DLC-ied and characterized. A detailed production process for RGEM, THGEM, RMmegas and uRwell will be presented during this talk.
Speaker: Mr Rui De Oliveira (CERN)
• 10:50
Performances of a resistive MicroMegas module for the Time Projection Chambers of the T2K Near Detector upgrade 20m
In view of the J-PARC program of upgrades of the beam intensity, the T2K collaboration is preparing towards an increase of the exposure aimed at establishing leptonic CP violation at 3 $\sigma$ level for a significant fraction of the possible $\delta_{CP}$ values. To reach this goal, an upgrade of the T2K near detector ND280 has been launched, with the aim of reducing the overall statistical and systematic uncertainties at the appropriate level of better than 4\%. We have developed an innovative concept for this neutrino detection system, comprising the totally active Super-Fine-Grained-Detector (SuperFGD), two High Angle TPC (HA-TPC) and six TOF planes. The HA-TPC will be used for 3D track reconstruction, momentum measurement and particle identification. These TPC, with overall dimensions of 2x2x0.8 m3, will be equipped with 32 resistive Micromegas. The thin field cage (3 cm thickness, 4% rad. length) will consist of composite material with a Kapton foil with copper strips as inner layer. The 34x42 cm2 resistive bulk Micromegas will use a 500 kOhm/square DLC foil to spread the charge over the pad plane, each pad being appr. 1 cm2. The front-end cards, based on the AFTER chip, will be mounted on the back of the Micromegas and parallel to its plane. The first resistive MicroMegas modules have been tested in a test beam at CERN and at DESY. Results of these test beams will be shown in this talk.
Speaker: César Jesús-Valls (IFAE)
• 11:10 11:30
Coffee break 20m
• 11:30 13:10
Micropattern gas detectors
Convener: Dr Giovanni Bencivenni (LNF - INFN)
• 11:30
Pixelated Resistive Micromegas for Tracking Systems in High Rate environment 20m
Speaker: Mauro Iodice (INFN Roma Tre, Italy)
• 11:50
The μ-RWELL for high rate applications 20m
The micro-Resistive-WELL (μ-RWELL) is a compact, simple and robust Micro-Pattern Gaseous Detector (MPGD) developed for large area HEP applications requiring the operation in harsh environment. The detector amplification stage, similar to a GEM foil, is realized with a polyimide structure micro-patterned with a blind-hole matrix, embedded through a thin Diamond Like Carbon (DLC) resistive layer with the readout PCB. The introduction of a resistive layer (ρ~50÷200 MΩ/square) mitigating the transition from streamer to spark gives the possibility to achieve large gains (>10^4), while affecting the detector performance in terms of rate capability. Different detector layouts have been studied: the most simple one based on a single-resistive layer with edge grounding has been designed for low-rate applications (few tens of kHz/cm2); more sophisticated schemes have been studied for high-rate purposes (≥ 10 MHz/cm2). The single-resistive layer scheme, extensively tested and validated, it is mature for the technology transfer towards the industry working into the rigid and flexible PCB photolithography. The high-rate version of the detector has been developed in the framework of the phase-2 upgrade of the LHCB muon system, where strong requirements on the robustness and rate capability are required. An overview of the different architectures studied for the high-rate version of the detector, together with their performance measured at the high intensity PiM1 beam of the PSI will be presented. The presence of the resistive layer also affects the charge spread on the strips and consequently the spatial resolution of the detector: the results of a systematic study of the spatial resolution obtained with the charge centroid (CC) method for orthogonal tracks as a function of the DLC resistivity will be discussed. For non-orthogonal tracks the spatial resolution with CC method is compared with the performance obtained with the micro-TPC mode: a readout approach that exploiting the combined measurement of the ionization clusters time of arrival and the amplitude of the signals on the strips allows a fine estimation of the position of the track for a wide incident angular range. The excellent performance together with the high flexibility of the technology suggests the use of such a detector as a high space resolution inner tracker in HEP.
Speaker: Mr Matteo Giovannetti (LNF-INFN)
• 12:10
Gaseous Detector Studies with the VMM3a ASIC and the SRS 20m
The developments in particle and nuclear physics experiments show four main requirements on the performance of gaseous detectors: large area coverage, high rate capability, excellent time resolution and good spatial resolution. As consequence new requirements for the readout electronics are defined. In the particular case of the ATLAS New Small Wheel Upgrade, the VMM3a ASIC has been developed and optimised for tracking and triggering detectors. The ASIC provides many features, making it interesting for other applications. Thus it has been recently implemented into RD51’s Scalable Readout System (SRS), enabling the usage of the VMM3a in small R&D laboratory set-ups and mid-scale experiments. In this talk the capabilities of the VMM3a within RD51's SRS are presented by showing results obtained with a triple-GEM detector and X-ray sources. Preceded by an introduction to VMM3a/SRS, it will be shown, that with the VMM3a's features, in particular the nanosecond time resolution and the continuous readout, deeper measurements for the understanding of a detector can be performed. The rare case of fluorescence X-rays, also known as 'escape photons', interacting in the gas volume of the detector can be resolved and used to determine the electron drift velocity in a dedicated set-up. The MHz rate capability of the VMM3a enables fast continuous X-ray imaging applications. First results of these measurements are presented, including an investigation of the neighbouring logic on the position reconstruction. This hardware feature should allow to gain additional information on the signal distribution, taking below-threshold hits into account.
Speaker: Lucian Scharenberg (CERN, University of Bonn (DE))
• 12:30
Preliminary results from the cosmic data taking of the BESIII cylindrical GEM detectors 20m
BESIII (Beijing Spectrometer III) is a multipurpose spectrometer optimized for physics in the tau-charm energy region. Both detector and accelerator are undergoing an upgrade program, that will allow BESIII to run until 2029. A major upgrade is the replacement of the inner drift chamber with a new detector based on Cylindrical Gas Electron Multipliers to improve both the secondary vertex reconstruction and the radiation tolerance. The CGEM-IT will be composed of three concentric layers of cylindrical triple GEMs, operating in an Ar-ISO (90/10) gas mixture with field and gains optimized to maximize the spatial resolution using a charge and time readout. The new detector is readout with innovative TIGER electronics produced in 110 nm CMOS technology. The front end is a custom designed 64-channel ASIC featuring a fully digital output and operated in triggerless mode. It can provide analog and time measurements at the same time with a TDC time resolution better than 100 ps, that will allow to operate the cylindrical layers in the microTPC mode. With planar prototypes, we measured an unprecedented spatial resolution below 150 microns in 1 Tesla magnetic field. It was measured in a wide range of incident angle of the incoming particle. Before the installation inside BESIII, foreseen in 2021, a long standalone data taking is ongoing at the Institute of High Energy Physics in Beijing; currently, the first two cylindrical chambers are available for the test, and are used to complete the integration between the detector and the electronics and to assess the required performance. In this presentation a description of the CGEM-IT project, the TIGER features and performance, and the results of the analysis of first cosmic ray data taking will be presented. Focus will be given on the strip analysis, from which it is possible to measure the basic properties of the detector, and the cluster analysis, where a comparison with the results with planar prototypes will be discussed. The first preliminary results on efficiency and spatial resolution will be also presented.
Speakers: Dr GIULIO MEZZADRI (INFN Ferrara - IHEP), Riccardo Farinelli (INFN - Ferrara)
• 12:50
Status of the GEM/CSC tracking system of the BM@N experiment 20m
Baryonic Matter at Nuclotron (BM@N) is a fixed target experiment at the NICA accelerator complex (JINR) aiming at studies of nuclear matter in relativistic heavy ion collisions. Triple GEM (Gas electron multiplier) detectors have been identified as suitable for the BM@N central tracking system, which is located inside the analyzing magnet. A cathode strip chamber (CSC) is mounted outside the magnet to improve the momentum resolution of the experimental setup. Seven GEM detectors and one CSC are integrated into the BM@N experimental setup and data acquisition system. The structure of the BM@N GEM and CSC detectors and the results of the study of their characteristics are presented. The full configuration of the GEM/CSC tracking system is shortly reviewed.
Speaker: Elena Kulish (JINR)
• 13:10 14:30
Lunch or Ski 1h 20m
• 14:30 17:00
Electronics, Trigger and Data Acquisition
Convener: Yoshihito IWASAKI (KEK)
• 14:30
Development of the ATLAS Liquid Argon Calorimeter Readout Electronics for the HL-LHC 20m
To meet new TDAQ buffering requirements and withstand the high expected radiation doses at the high-luminosity LHC, the ATLAS Liquid Argon Calorimeter readout electronics will be upgraded. The triangular calorimeter signals are amplified and shaped by analogue electronics over a dynamic range of 16 bits, with low noise and excellent linearity. Developments of low-power preamplifiers and shapers to meet these requirements are ongoing in 130nm CMOS technology. In order to digitize the analogue signals on two gains after shaping, a radiation-hard, low-power 40 MHz 14-bit ADCs is developed using a pipeline+SAR architecture in 65 nm CMOS. Characterization of the prototypes of the frontend components show good promise to fulfill all the requirements. The signals will be sent at 40MHz to the off-detector electronics, where FPGAs connected through high-speed links will perform energy and time reconstruction through the application of corrections and digital filtering. Reduced data are sent with low latency to the first level trigger, while the full data are buffered until the reception of trigger accept signals. The data-processing, control and timing functions will be realized by dedicated boards connected through ATCA crates. Results of tests of prototypes of front-end components will be presented, along with design studies on the performance of the off-detector readout system.
Speaker: Dr Vladimir Zhulanov (Budker INP)
• 14:50
The Phase-I Trigger Readout Electronics Upgrade of the ATLAS Liquid Argon Calorimeters 20m
Electronics developments are pursued for the trigger readout of the ATLAS Liquid-Argon Calorimeter towards the Phase-I upgrade scheduled in the LHC shut-down period of 2019-2020. Trigger signals with higher spatial granularity and higher precision are needed in order to improve the identification efficiencies of electrons, photons, tau, jets and missing energy, at high background rejection rates, already at the Level-1 trigger. The LAr Trigger Digitizer system will digitize the 34,000 channels (SuperCells) at a 40 MHz sampling frequency with 12 bit precision after the bipolar shaping of the front-end system. The data will be transmitted to the LAr Digital Processing system in the back-end to extract the transverse energies and perform the bunch-crossing identification. A demonstrator has been installed during Run-2, and the results of the data-taking have helped to validate the chosen technology. Results of ASIC developments including QA/QC and radiation hardness evaluations, performance of the pre-production boards, results of the system integration tests, QA/QC test of final production boards will be presented along with the overall system design and status of the installation and commissioning.
Speaker: Mr Etienne FORTIN (CPPM)
• 15:10
Data Acquisition System for Belle II Electromagnetic Calorimeter 20m
Belle II experiment is conducted in KEK institute, at the SuperKEKB B-factory, with all detector subsystems taking data since March 2019. One of the primary detector subsystems is an electromagnetic crystal calorimeter (ECL) that consists of 8736 CsI(Tl) scintillation crystals. This report describes data acquisition (DAQ) system that has been developed for ECL. Front-end electronics of ECL DAQ consists of several hundred highly configurable FPGA-controlled modules that utilize pipeline readout architecture and are able to handle up to 30 kHz trigger rate. ECL front end electronics are initialized, configured and monitored by ECL DAQ software. Initialization software library can work with several transport protocols, internally optimize requests to the electronics and perform caching of the configuration data. Configuration software manages and monitors more than 50’000 electronics parameters and updates them based on the calibrations. Continuous monitoring of ECL data quality is also implemented. ECL DAQ software is integrated with Network Shared Memory 2, slow control system used in Belle II experiment.
Speaker: Mr Mikhail Remnev (BINP)
• 15:30
FPGA-based algorithms for feature extraction in the PANDA shashlyk calorimeter 20m
PANDA is one of the four experimental pillars of the upcoming FAIR facility in Darmstadt, Germany. In PANDA, an antiproton beam with an energy between 1.5 and 15 GeV/$c$ will interact in a hydrogen or nuclear target, allowing for studies of various aspects of non-perturbative QCD. Motivated by the high interaction rates and the diverse physics goals of the experiment, a triggerless readout approach will be employed. In this approach, each detector subsystem will be equipped with intelligent front-end electronics that independently identify signals of interest in real time. In order to detect the most forward-directed photons, electrons and positrons in PANDA, a shashlyk- type calorimeter is being constructed. This detector consists of 1512 individual cells of interleaved plastic scintillators and lead plates, and has been optimised to have a relative energy resolution of approximately 3%/$\sqrt{\text{GeV}}$ and a time resolution of approximately 100 ps/$\sqrt{\text{GeV}}$. The signals from this detector will be digitised by sampling ADCs and processed in real time by FPGAs. As part of the triggerless approach, these FPGAs will perform so-called feature extraction on the digitised signals, where the pulse-height and time of incoming pulses are extracted in real time. A substantial pileup rate is expected, and it is foreseen that the chosen algorithm should enable reconstruction of such events. The work presented here has consisted of developing a detailed Geant4-based model of the shashlyk calorimeter and readout system, calibrating this model against testbeam data, and using it to evaluate potential feature-extraction algorithms for the PANDA shashlyk calorimeter.
Speaker: Mr Markus Preston (Stockholm University)
• 15:50
Performance of the Belle II calorimeter trigger system at the SuperKEKB Phase 3 run 20m
The Belle II experiment at the SuperKEKB electron-positron collider began physics data-taking in 2019 with full detectors. The main goal of the Belle II is to search for new physics beyond the Standard Model in heavy flavor sector. In order to select events of interest efficiently under severe beam background environment from higher instantaneous luminosity run than the KEKB collider, we have upgraded a real-time hardware trigger system using the CsI(Tl) electromagnetic calorimeter. In this report, performance of the calorimeter trigger system under SuperKEKB Phase 3 operation will be described.
Speaker: Prof. ByungGu CHEON (Hanyang University)
• 16:10
Coffee break 30m
• 16:40
The ATLAS Electron and Photon Trigger Performance in Run 2 20m
ATLAS electron and photon triggers covering transverse energies from 5 GeV to several TeV are essential to record signals for a wide variety of physics: from Standard Model processes to searches for new phenomena in both proton-proton and heavy ion collisions. Main triggers used during Run 2 (2015-2018) for those physics studies were a single-electron trigger with ET threshold around 25 GeV and a diphoton trigger with thresholds at 25 and 35 GeV. Relying on those simple, general-purpose triggers is seen as a more robust trigger strategy, at a cost of slightly higher trigger output rates, than to use a large number of analysis-specific triggers. To cope with ever-increasing luminosity and more challenging pile-up conditions at the LHC, the trigger selections needed to be optimized to control the rates and keep efficiencies high. The ATLAS electron and photon performance during Run-2 data-taking is presented as well as work ongoing to prepare to even higher luminosity of Run 3 (2021-2023).
Speaker: Mr Dmitriy Maximov (Budker Institute of Nuclear Physics)
• 17:00 18:00
Conference Summary 1h
Speaker: Prof. Maxim Titov (CEA Saclay, Irfu)
• 18:00 18:15
Conference Closing 15m