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First demonstration of THGEM/GAPD-matrix optical readout in two-phase Cryogenic Avalanche Detector in Ar

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arxiv 1303.4817 v1 pith:KJFVVGVA submitted 2013-03-20 physics.ins-det hep-ex

First demonstration of THGEM/GAPD-matrix optical readout in two-phase Cryogenic Avalanche Detector in Ar

A. Bondar , A. Buzulutskov , A. Dolgov , A. Grebenuk , E. Shemyakina , A. Sokolov , A. Breskin , D. Thers This is my paper
classification physics.ins-det hep-ex
keywords avalanchethgemcryogenicdetectorgapd-matrixgapdsmultiplieroptical
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The multi-channel optical readout of a THGEM multiplier coupled to a matrix of 3x3 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). At an avalanche charge gain of 160, the yield of the combined THGEM/GAPD-matrix multiplier amounted at ~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 dark matter search experiments.

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