TPB-coated WLS fibers achieve LCE of 1.18% (Xe) and 1.07% (Ar) up to 8.5 bar with SiPM readout, confirmed by an independent PMT setup after PDE scaling.
Development of an anti-Compton veto for HPGe detectors operated in liquid argon using Silicon Photo-Multipliers
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abstract
A proof of concept detector is presented for scintillation light detection in liquid argon using Silicon Photo-Multipliers. The aim of the work is to build an anti-Compton veto for germanium detectors operated directly in liquid argon like in the GERDA experiment. Properties of the Multi-Pixel Photon Counter (MPPC) are studied at cryogenic temperatures. To increase the light collection efficiency of the MPPCs wavelength shifting fibers were used. A veto efficiency comparable to a similar setup with a Photo-Multiplier Tube was achieved.
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physics.ins-det 1years
2026 1verdicts
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Detection of scintillation light in noble gases with wavelength-shifting optical fibers
TPB-coated WLS fibers achieve LCE of 1.18% (Xe) and 1.07% (Ar) up to 8.5 bar with SiPM readout, confirmed by an independent PMT setup after PDE scaling.