Speaker
Andrey Sokolov
(Budker Institute of Nuclear Physics)
Description
We compare the performances of different types of Geiger-mode APDs (GAPDs or SiPMs), manufactured by CPTA company, at cryogenic temperature, namely at 87 K. Noise rate, gain characteristics and signal shapes were measured, both at room and cryogenic temperature. Four types of GAPDs were investigated, having an active area of 1x1, 2.1x2.1, 2.5x2.5, and 3x3 mm2. The best performance showed the GAPD with 2.1x2.1 mm2 active area, in terms of the maximum gain, minimum noise rate and effective active area. This study is done in the frame of the project, developed in our laboratory, on the Cryogenic Avalanche Detector (CRAD) with optical readout using combined THGEM/GAPD-matrix multiplier. Preliminary results on the data acquisition system of the 3x3 GAPD-matrix are also presented. This technique is aimed at applications in rare-event experiments, such as those of coherent neutrino-nucleus scattering and dark matter search.
Author
Andrey Sokolov
(Budker Institute of Nuclear Physics)
Co-authors
Alex Bondar
(Budker Institute of Nuclear Physics (RU))
Alexander Dolgov
(Novosibirsk State University)
Alexei Buzulutskov
(Budker Institute of Nuclear Physics)
Ekaterina Shemyakina
(Novosibirsk State University)
