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

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 16...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2013-12, Vol.732, p.213-216
Main Authors: Bondar, A., Buzulutskov, A., Dolgov, A., Grebenuk, A., Shemyakina, E., Sokolov, A., Breskin, A., Thers, D.
Format: Article
Language:English
Subjects:
Accelerators
Avalanches
Detectors
Gain
Geiger mode APDs
Infrared
Multipliers
Spectra
Thick GEMs
Two-phase cryogenic avalanche detectors
X-rays
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Summary: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 20keV X-ray absorbed in the liquid phase. A spatial resolution of 2.5mm (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.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2013.07.089