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SUMMARY:Electromagnetic calorimeter PHOS256 current status\, performance o
 n cosmic muons and simulation results
DTSTART;VALUE=DATE-TIME:20261030T093000Z
DTEND;VALUE=DATE-TIME:20261030T094500Z
DTSTAMP;VALUE=DATE-TIME:20261101T090937Z
UID:indico-contribution-6381@cern.ch
DESCRIPTION:Speakers: Dmitry Averyanov (NRC "Kurchatov Institute")\nHomoge
 neous calorimeters based on scintillation single crystals are widely used 
 in high-energy physics due to their good energy\, position and time resolu
 tion.  A small precise 256-channel photon spectrometer (PHOS256) based on 
 PbWO$_4$ crystals is proposed for an experiment at the U-70 accelerator fa
 cility for measurements of spectra of neutral mesons and direct photons wi
 th proton\, pion\, and kaon beams of momenta 26.5–50 GeV/*c* on nuclear 
 targets.\n\nSuch a detector can also be used for measurements of the linea
 r photon polarization using photon conversion into e+e- pair on a dedicate
 d converter in front of the calorimeter via analyzing an asymmetry of clus
 ters containing both particles. The calorimeter’s design is optimized us
 ing simulations with the Pythia and Geant4 packages. The calorimeter const
 ruction will be discussed - the PbWO$_4$ crystals\, the avalanche photodet
 ectors attached to the crystals\, the main electronics\, and the cooling e
 quipment. The reconstruction of photon pairs from π$^0$ mesons and η mes
 ons will be considered to determine the optimal calorimeter position.\n\nF
 irst results on the detector response to the cosmic muons and the comparis
 on with results of Monte-Carlo simulations will be presented.\n\nhttps://i
 ndico.particle.mephi.ru/event/626/contributions/6381/
LOCATION: Conference Hall 5
URL:https://indico.particle.mephi.ru/event/626/contributions/6381/
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