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26 April 2024

» arxiv » 1003.1597

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Geiger Mode APD performance in a cryogenic two-phase Ar avalanche detector based on THGEMs
A. Bondar ; A. Buzulutskov ; A. Grebenuk ; A. Sokolov ; D. Akimov ; I. Alexandrov ; A. Breskin ;
Date:	9 Mar 2010
Abstract:	Characteristic properties of a Geiger Mode APD (G-APD) in a THGEM-based cryogenic two-phase Ar avalanche detector were studied in view of potential applications in rare-event experiments. G-APD signal amplitude and noise characteristics at cryogenic temperatures turned out to be superior to those at room temperature. The effective detection of avalanche scintillations from THGEM-multiplier holes in two-phase Ar has been demonstrated using G-APD with no wavelength shifter. At an avalanche gain of 60, the avalanche scintillation yield measured by the G-APD was as high as 1.4 photoelectrons per avalanche electron, over 4pi.
Source:	arXiv, 1003.1597
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