First demonstration of THGEM/GAPD-matrix optical readout in two-phase Cryogenic Avalanche Detector in Ar
arXiv:1303.4817 · doi:10.1016/j.nima.2013.07.089
Abstract
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.
4 pages, 6 figures. Presented at Vienna Conference of Instrumentation (Feb 15-20, 2013, Vienna, Austria). Submitted to the Proceedings
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- Characterization of photo-multiplier tubes for the Cryogenic Avalanche Detector
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- The Thick Gas Electron Multiplier and its derivatives: physics, technologies and applications
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- MPPC versus MRS APD in two-phase Cryogenic Avalanche Detectors
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- Observation of unusual slow components in electroluminescence signal of two-phase argon detector
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- Electron transfer efficiency in liquid xenon across THGEM holes