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SUMMARY:Study of the Single-Photoelectron Signal in Photomultiplier Tubes 
 of the DANSS Detector
DTSTART;VALUE=DATE-TIME:20261027T162500Z
DTEND;VALUE=DATE-TIME:20261027T163000Z
DTSTAMP;VALUE=DATE-TIME:20261021T081837Z
UID:indico-contribution-6411@cern.ch
DESCRIPTION:Speakers: Dmitry Ilyushkin ()\nThe DANSS experiment at the Kal
 inin NPP measures the reactor\nantineutrino flux and spectrum in order to 
 search for sterile neutrinos\nand to address a range of fundamental and ap
 plied physics problems.\nThe readout of the detector's 1 m³ plastic scint
 illator array is\nbased on a hybrid system including photomultiplier tubes
  (PMTs)\nand silicon photomultipliers (SiPMs).\nHigh-precision Monte Carlo
  (MC) simulations\, which\nare essential for accurate energy reconstructio
 n\, require detailed\nmodeling of the PMT response. This work focuses on t
 he\nanalysis of the single-photoelectron (SPE) signal characteristics in\n
 these PMTs. To extract these characteristics\, the photocathodes were\nill
 uminated with low-intensity LED pulses of varying brightness. The\nmeasure
 d amplitude spectra were approximated using a convolution of a\nPoisson di
 stribution — accounting for electron emission statistics from\nthe photo
 cathode and first dynode — and a Gaussian function representing\nelectro
 nic noise. By analysis of the dependence of the fit parameters on\nlight i
 ntensity\, we derived characteristics for each\nindividual PMT. The averag
 ed key parameters of the readout system were\ndetermined and successfully 
 implemented into the DANSS MC simulation\nframework.\n\nhttps://indico.par
 ticle.mephi.ru/event/626/contributions/6411/
LOCATION:Sevastopol hotel Conference Hall 1
URL:https://indico.particle.mephi.ru/event/626/contributions/6411/
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