Open AccessПерспектива использования кремниевых фотоумножителей в детекторной камере малоразмерного черенковского гамма-телескопа для снижения порога регистрации космического излучения
Author(s) -
Е.Е. Холупенко,
А.М. Красильщиков,
Д.В. Бадмаев,
А.А. Богданов,
Ю.В. Тубольцев,
Ю.В. Чичагов,
А.С. Антонов,
Д.О. Кулешов,
Е.М. Хилькевич
Publication year - 2020
Publication title -
žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-748X
pISSN - 0044-4642
DOI - 10.21883/jtf.2020.06.49278.354-19
Subject(s) - physics , photomultiplier , telescope , silicon photomultiplier , optics , noise (video) , duty cycle , cherenkov radiation , cherenkov telescope array , cosmic ray , signal (programming language) , cherenkov detector , detector , astronomy , voltage , computer science , scintillator , quantum mechanics , artificial intelligence , image (mathematics) , programming language
We have modeled propagation of source signal and noise for a future camera of TAIGA-IACT Cherenkov gamma-ray telescope, which will be based on silicon photomultipliers sensitive in the 240 -- 600 nm range. It has been shown that employment of such detectors instead of traditional vacuum photomultipliers will allow one to decrease the energy threshold by a factor of about 2.5: from ~ 1.5 TeV down to ~ 0.6 TeV. We have also shown that application of a standard ultraviolet filter ZWB3 will decrease the source signal by a factor of 3, while the noise signal from the night sky will be decreased by a factor of 6. In this way the duty cycle of the telescope can be extended (the telescope will be able to operate during moonlit nights and during twilight) and the energy threshold further decreased down to ~ 0.3 TeV. A narrow 260 -- 300 nm filter can be employed to improve gamma-hadron separation of primary cosmic particles in the ~ 25 -- 50 TeV band.