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SUMMARY:Automatic Tuning of Silicon Photomultiplier Parameters for a Scint
 illation Hodoscope Using Atmospheric Muons
DTSTART;VALUE=DATE-TIME:20261027T162500Z
DTEND;VALUE=DATE-TIME:20261027T163000Z
DTSTAMP;VALUE=DATE-TIME:20261019T204222Z
UID:indico-contribution-6467@cern.ch
DESCRIPTION:Speakers: Ilya Sherstyanykh (IHEP)\nA method is proposed for t
 he automatic tuning of the operating parameters of silicon photomultiplier
 s (SiPMs) in the two-coordinate scintillation hodoscope of the SPASCHARM e
 xperiment using the atmospheric muon flux. The developed approach is inten
 ded to provide reproducible selection of discrimination thresholds and SiP
 M bias voltages\, as well as to monitor the stability of detector performa
 nce during the experiment.\n\nThe hodoscope under study is used in the SPA
 SCHARM experiment and consists of two mutually perpendicular planes\, each
  containing 32 scintillation elements\; light from each element is detecte
 d by an individual SiPM. Atmospheric muons are used as a natural source of
  penetrating charged particles\, enabling the detector to be tuned directl
 y in its operating geometry without the use of an external radioactive sou
 rce.\n\nThe readout electronics produces a binary indication of whether a 
 preset discrimination threshold has been exceeded. The SiPM response is th
 erefore studied by sequentially scanning the threshold at different bias v
 oltages. The measured dependence of the counting rate R(T) on threshold T 
 represents an integral threshold characteristic. To analyze the amplitude 
 structure of the signal\, the differential characteristic -dR/dT is used\;
  it is related to the pulse-amplitude distribution and makes it possible t
 o identify the transition region from noise triggers to signals caused by 
 traversing particles.\n\nEvent candidates are identified using spatially c
 onsistent hits in neighboring scintillators in both coordinate planes. The
  accidental-coincidence level is estimated by applying a time shift betwee
 n one plane and the other. The operating point is selected using a combina
 tion of observables: the single-count rate\, the coincidence rate of neigh
 boring elements\, the rate of muon-like events\, and the estimated acciden
 tal background.\n\nhttps://indico.particle.mephi.ru/event/626/contribution
 s/6467/
LOCATION:Sevastopol hotel Conference Hall 1
URL:https://indico.particle.mephi.ru/event/626/contributions/6467/
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