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Two-phase Cryogenic Avalanche Detectors with THGEM and hybrid THGEM/GEM multipliers operated in Ar and Ar+N2

Abstract : Two-phase Cryogenic Avalanche Detectors (CRADs) with GEM and THGEM multipliers have become an emerging potential technique for charge recording in rare-event experiments. In this work we present the performance of two-phase CRADs operated in Ar and Ar+N2. Detectors with sensitive area of 10 × 10 cm2, reaching a litre-scale active volume, yielded gains of the order of 1000 with a double-THGEM multiplier. Higher gains, of about 5000, have been attained in two-phase Ar CRADs with a hybrid triple-stage multiplier, comprising of a double-THGEM followed by a GEM. The performance of two-phase CRADs in Ar doped with N2 (0.1-0.6%) yielded faster signals and similar gains compared to the operation in two-phase Ar. The applicability to rare-event experiments is discussed.
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Submitted on : Monday, October 7, 2013 - 1:18:28 PM
Last modification on : Tuesday, June 4, 2019 - 6:45:39 PM

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A. Bondar, A. Buzulutskov, A. Dolgov, A. Grebenuk, E. Shemyakina, et al.. Two-phase Cryogenic Avalanche Detectors with THGEM and hybrid THGEM/GEM multipliers operated in Ar and Ar+N2. Journal of Instrumentation, IOP Publishing, 2013, 8, pp.P02008. ⟨10.1088/1748-0221/8/02/P02008⟩. ⟨in2p3-00870462⟩

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