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SUMMARY:Beam energy measurement system at BEPCII
DTSTART;VALUE=DATE-TIME:20170227T075000Z
DTEND;VALUE=DATE-TIME:20170227T081000Z
DTSTAMP;VALUE=DATE-TIME:20260711T231612Z
UID:indico-contribution-188-1732@indico.inp.nsk.su
DESCRIPTION:Speakers: Jianyong Zhang (Institute of High Energy Physics\, C
 AS)\nThe beam energy measurement system (BEMS) for Beijing electron positr
 on collider (BEPCII) is introduced. It is based on the measurement of Comp
 ton back scattered photons. The relative systematic uncertainty of beam en
 ergy measurement is estimated as $2*10^{-5}$. Some upgradations for BEMS a
 re also introduced.\n\nhttps://indico.inp.nsk.su/event/8/contributions/173
 2/
LOCATION:
URL:https://indico.inp.nsk.su/event/8/contributions/1732/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Scintillating Fibre Detector for the Mu3e Experiment
DTSTART;VALUE=DATE-TIME:20170227T085000Z
DTEND;VALUE=DATE-TIME:20170227T091000Z
DTSTAMP;VALUE=DATE-TIME:20260711T231612Z
UID:indico-contribution-188-1613@indico.inp.nsk.su
DESCRIPTION:Speakers: Simon Corrodi (Herr)\nMu3e is a dedicated experiment
  for the rare lepton flavour violating decay $\\mu^{+} \\rightarrow e^{+}e
 ^{-}e^{+}$. Its ultimate goal is to find or exclude this process if it occ
 urs more than once in $10^{16}$ muon decays. This constitutes four orders 
 of magnitude improvement with respect to the predecessor.\nA thin multi-la
 yer scintillating fibre detector consisting of $250~\\mu m$ thick fibres r
 ead out on both sides with silicon photomultiplier arrays provides an exce
 llent time measurement with $\\sigma\n\nhttps://indico.inp.nsk.su/event/8/
 contributions/1613/
LOCATION:
URL:https://indico.inp.nsk.su/event/8/contributions/1613/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Luminosity measurements at LHCb
DTSTART;VALUE=DATE-TIME:20170227T081000Z
DTEND;VALUE=DATE-TIME:20170227T083000Z
DTSTAMP;VALUE=DATE-TIME:20260711T231612Z
UID:indico-contribution-188-1681@indico.inp.nsk.su
DESCRIPTION:Speakers: Vladislav Balagura (CNRS / LLR - Ecole polytechnique
 )\nLuminosity measurements at LHCb are of pivotal importance.\nThey have b
 een used in about 50 LHCb publications of production cross section results
 .\nThe interaction rate at LHCb is continuously monitored  by several lumi
 nosity counters\n(like the number of reconstructed tracks) measuring the f
 raction of "empty" events\,\ni.e. events which fall below a chosen thresho
 ld of a given luminosity counter.\nUsing the law of Poisson statistics\, a
 n average interaction rate per bunch crossing\nis derived from the "empty"
  events fraction.\nThe absolute calibration of the luminosity counters is 
 performed a few times per year\n(typically for each new beam energy and be
 am types)\, mostly in dedicated LHC fills.\nTwo techniques are employed fo
 r the direct luminosity measurement.\nThe first one is the classic van der
  Meer scan method which is used by all four LHC\nexperiments. The second o
 ne is unique to LHCb. Here\, the beam\nprofiles and their overlap integral
  are determined from the\nbeam "images" recorded with beam-gas interaction
 s. Both\ntechniques give similar accuracy but have different\nsystematics.
  Their combination has allowed us to obtain in LHC Run I the\nmost precise
  luminosity measurement ever achieved at a bunched hadron\ncollider.\nIn t
 his talk\, we give an overview of the LHCb experience with the luminosity 
 calibration\,\npresent several recent calibration results and outline the 
 developments which\nare being pursued to obtain a better understanding of 
 the calibrations.\n\nhttps://indico.inp.nsk.su/event/8/contributions/1681/
LOCATION:
URL:https://indico.inp.nsk.su/event/8/contributions/1681/
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BEGIN:VEVENT
SUMMARY:The Fermilab Muon g-2 experiment: laser calibration system
DTSTART;VALUE=DATE-TIME:20170227T100000Z
DTEND;VALUE=DATE-TIME:20170227T102000Z
DTSTAMP;VALUE=DATE-TIME:20260711T231612Z
UID:indico-contribution-188-1707@indico.inp.nsk.su
DESCRIPTION:Speakers: Marin Karuza (University of Rijeka and INFN Trieste)
 \nThe anomalous muon dipole magnetic moment can be measured (and calculate
 d) with great precision thus providing insight on the Standard Model and n
 ew physics. Currently an experiment is under construction at Fermilab (USA
 ) which is expected to measure the anomalous muon dipole magnetic moment w
 ith unprecedented precision. One of the improvements with respect to the p
 revious experiments is expected to come from the laser calibration system 
 which has been designed and constructed by Italian part of the collaborati
 on (INFN). An emphasis of this talk will be on the calibration system that
  is in the final stages of construction as well as the experiment which is
  expected to start data taking this year.\n\nhttps://indico.inp.nsk.su/eve
 nt/8/contributions/1707/
LOCATION:
URL:https://indico.inp.nsk.su/event/8/contributions/1707/
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BEGIN:VEVENT
SUMMARY:Laser backscattering for beam energy calibration in collider exper
 iments. Recent results.
DTSTART;VALUE=DATE-TIME:20170227T073000Z
DTEND;VALUE=DATE-TIME:20170227T075000Z
DTSTAMP;VALUE=DATE-TIME:20260711T231612Z
UID:indico-contribution-188-1716@indico.inp.nsk.su
DESCRIPTION:Speakers: Nikolai Muchnoi (Budker INP SB RAS)\nThe report is d
 evoted to the beam energy measurement systems which are now in operation a
 t the BEPC-II and the VEPP-2000 colliders. After brief histrorical overvie
 w\, it describes the principles of operation\, interesting options\, prese
 nt performance and accuracy achievments of the approach.\n\nhttps://indico
 .inp.nsk.su/event/8/contributions/1716/
LOCATION:
URL:https://indico.inp.nsk.su/event/8/contributions/1716/
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BEGIN:VEVENT
SUMMARY:Optimization of the beam crossing angle at the ILC  for e+e- and g
 amma-gamma collisons
DTSTART;VALUE=DATE-TIME:20170227T094000Z
DTEND;VALUE=DATE-TIME:20170227T100000Z
DTSTAMP;VALUE=DATE-TIME:20260711T231612Z
UID:indico-contribution-188-1737@indico.inp.nsk.su
DESCRIPTION:Speakers: Valery Telnov (BINP\, Novosibirsk Univ.)\nIn the pre
 sent ILC design the beam crossing angle for e+e- collisions is 14 mrad. Th
 e photon collider needs the angle about 25 mrad due to larger beam disrupt
 ion angle. The solution is suggested which decreases the required crossing
  angle for the photon collider down to 20 mrad and allows to work in both 
 modes of collisions without any degradation of performance.\n\nhttps://ind
 ico.inp.nsk.su/event/8/contributions/1737/
LOCATION:
URL:https://indico.inp.nsk.su/event/8/contributions/1737/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The KLOE-2 High Energy Taggers
DTSTART;VALUE=DATE-TIME:20170227T083000Z
DTEND;VALUE=DATE-TIME:20170227T085000Z
DTSTAMP;VALUE=DATE-TIME:20260711T231612Z
UID:indico-contribution-188-1754@indico.inp.nsk.su
DESCRIPTION:Speakers: Francesca Curciarello (INFN-LNF)\nThe precision meas
 urement of the $\\pi^0\\to \\gamma \\gamma$ width allows to gain insights 
 into the strong QCD dynamics.  A way to achieve the precision needed (1%) 
 in order to test Theory predictions is to study the $\\pi^0$ production tr
 ough $\\gamma \\gamma$ fusion in the $e^+ e^-  \\to e^+ e^- \\gamma^{\\sta
 r} \\gamma^{\\star}\\to e^+ e^- \\pi^0$ reaction. The KLOE-2 experiment\, 
 currently running at the DA$\\Phi$NE facility in Frascati\, aims to perfor
 m this measurement. For this reason\,  new detectors\, which allow to tag 
 final state leptons\, have been installed along the DA$\\Phi$NE beam line 
 in order to reduce the huge background coming from $\\phi$-meson decays. \
 nThe High Energy Tagger (HET) detector measures the deviation of leptons f
 rom their main orbit by determining their position and timing. The HET det
 ectors are placed in roman pots just at the exit of the DA$\\Phi$NE dipole
  magnets\, 11 m away from the IP\, both on positron and electron sides. Th
 e HET sensitive area is made up of a set of 28 plastic scintillators. A de
 dicated DAQ electronic board\, based on a Xilinx Virtex-5 FPGA\, has been 
 developed for this detector. It provides a MultiHit TDC with a time resolu
 tion of 550(1) ps and the possibility to clearly identify the correct bunc
 h crossing ($\\Delta T_{bunch}\\sim 2.7 \\rm~ns$). The most relevant featu
 res of the KLOE-2 tagging system operation as time performance\, stability
 \, efficiency\, and the techniques used to determine the time overlap betw
 een the KLOE and HET asynchronous DAQs will be presented.\n\nhttps://indic
 o.inp.nsk.su/event/8/contributions/1754/
LOCATION:
URL:https://indico.inp.nsk.su/event/8/contributions/1754/
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