On the low-temperature performances of THGEM and THGEM/G-APD multipliers in gaseous and two-phase Xe

Abstract

The performances of THGEM multipliers in two-phase Xe avalanche mode are presented for the first time. Additional results on THGEM operation in gaseous Xe at cryogenic temperatures are provided. Stable operation of a double-THGEM multiplier was demonstrated in two-phase Xe with gains reaching 600. These are compared to existing data, summarized here for two-phase Ar, Kr and Xe avalanche detectors incorporating GEM and THGEM multipliers. The optical readout of THGEMs with Geiger-mode Avalanche Photodiodes (G-APDs) has been investigated in gaseous Xe at cryogenic temperature; avalanche scintillations were recorded in the Near Infrared (NIR) at wavelengths of up to 950 nm. At avalanche charge gain of 350, the double-THGEM/G-APD multiplier yielded 0.07 photoelectrons per initial ionization electron, corresponding to an avalanche scintillation yield of 0.7 NIR photons per avalanche electron over 4pi. The results are compared with those of two-phase Ar avalanche detectors. The advantages, limitations and possible applications are discussed.

22 pages, 14 figures. Revised Figs. 10,11 and Table 1. To be published in JINST

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Cited by in corpus (13)

• Liquid noble gas detectors for low energy particle physics
• Advances in Cryogenic Avalanche Detectors
• Electroluminescence and electron avalanching in two-phase detectors
• Liquid Hole Multipliers: bubble-assisted electroluminescence in liquid xenon
• Recent advances with THGEM detectors
• First in-beam studies of a Resistive-Plate WELL gaseous multiplier
• The Thick Gas Electron Multiplier and its derivatives: physics, technologies and applications
• MPPC versus MRS APD in two-phase Cryogenic Avalanche Detectors
• Study of infrared scintillations in gaseous and liquid argon - Part I: methodology and time measurements
• Optical readout: a tool for studying gas-avalanche processes
• Two-phase xenon emission detector with electron multiplier and optical readout by multipixel avalanche Geiger photodiodes
• Study of infrared scintillations in gaseous and liquid argon - Part II: light yield and possible applications
• Performance degradation of Geiger-mode APDs at cryogenic temperatures