Author/Authors :
Bondar، نويسنده , , A. and Buzulutskov، نويسنده , , A. D. Dolgov and B. E. J. Pagel، نويسنده , , A. and Grebenuk، نويسنده , , A. and Shemyakina، نويسنده , , E. and Sokolov، نويسنده , , A. and Breskin، نويسنده , , A. and Thers، نويسنده , , D.، نويسنده ,
Abstract :
The multi-channel optical readout of a THGEM multiplier coupled to a matrix of 3×3 Geiger-mode APDs (GAPDs) was demonstrated in a two-phase Cryogenic Avalanche Detector (CRAD) in Ar. The GAPDs recorded THGEM-hole avalanches in the Near Infrared (NIR) spectral range. At an avalanche charge gain of 160, the yield of the combined THGEM/GAPD-matrix multiplier amounted to ~80 photoelectrons per 20 keV X-ray absorbed in the liquid phase. A spatial resolution of 2.5 mm (FWHM) has been measured for the impinging X-rays. This technique has potential applications in coherent neutrino-nucleus scattering and in dark matter search experiments.
