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arXiv · 1003.1597

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
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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 a G-APD without wavelength shifter. At an avalanche gain of 60, the avalanche scintillation yield measured by the G-APD was as high as 0.9 photoelectrons per avalanche electron, extrapolated to 4pi acceptance.

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A. Bondar, A. Buzulutskov, A. Grebenuk, A. Sokolov, D. Akimov, I. Alexandrov, A. Breskin. 2010-03-08. Geiger Mode APD performance in a cryogenic two-phase Ar avalanche detector based on THGEMs. https://doi.org/10.1016/j.nima.2010.07.002

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