Speaker
Mohamed Awadein
(Stefan Meyer Institute. Austria)
Description
The ALICE Collaboration is preparing a major detector upgrade for the second LHC shutdown (2019-2020). The LHC luminosity and collision rate from 2021 onwards will considerably exceed the design parameters of the present ALICE forward trigger detectors. Furthermore, the introduction of a new Muon Forward Tracker will significantly reduce the space available for the upgraded trigger detectors. To comply with these conditions a Fast Interaction Trigger (FIT) has been designed. The FIT will be the primary forward trigger and will provide minimum bias trigger, multiplicity trigger, centrality, beam-gas event rejection, collision time for the Time of Flight detector (TOF), offline multiplicity and event plane determination. The FIT detector comprises of two subdetector systems, T0+ and V0+. The T0+ consists of two arrays of quartz radiators coupled to MCP-PMT sensors facing the interaction point. The V0+ detector is composed of a disk of plastic scintillator segments, optical fiber bundles, and photosensors. In this contribution, we will focus on the V0+ detector.
The V0+ detector requires high efficiency, high dynamic range (1 – 500) particles, radiation hardness and must be compatible with 25 ns bunch spacing and ~ 1-2 MHz interaction rate for pp collisions of the new LHC operation while keeping the time resolution of about 200 ps for a single particle. In order to fulfill these technical challenges, a rigorous R&D work is ongoing. In this talk, we will present the latest status of the R&D, an optimization of scintillator material, the choice of photosensors (SiPM, Finemesh PMT, and MCP-PMT), the design of the optical fiber bundles and the readout electronics as well as an outlook.
Primary author
Mohamed Awadein
(Stefan Meyer Institute. Austria)
Co-authors
A Maevskay
(Institute for Nuclear Research of the Russian Academy of Sciences,Russia)
D.A. Finogeev
(Institute for Nuclear Research of the Russian Academy of Sciences,Russia.)
D.M Gómez-Coral
(Instituto de Física, UNAM. Mexico City, Mexico.)
D:V Serebryakov
(Institute for Nuclear Research of the Russian Academy of Sciences,Russia)
G Saber
(Al-Azhar University, Physics Department, Cairo, EGY)
J Zmeskal
(Stefan Meyer Institute. Austria)
K Suzuki
(Stefan Meyer Institute.Austria)
L Gruber
(Stefan Meyer Institute. Austria)
M Słupecki
(University of Jyväskylä, Finland)
R. Alfaro-Molina
(Instituto de Física, UNAM. Mexico City, Mexico.)
T.L Karavicheva
(nstitute for Nuclear Research of the Russian Academy of Sciences,Russia.)
V Grabski
(nstituto de Física, UNAM. Mexico City, Mexico.)
V.A Kaplin
(National Research Nuclear University MEPhI, Russia.)
W Weber
(Stefan Meyer Institute.Austria)
W.H Trzaska
(University of Jyväskylä, Finland)
Yu.A Melikyan
(National Research Nuclear University MEPhI, Russia)
