Hybrid Multi Micropattern Gaseous Photomultiplier for detection of liquid-xenon scintillation
arXiv:1110.6053 · doi:10.1016/j.nima.2011.11.018
Abstract
Gaseous PhotoMultipliers (GPM) are a very promising alternative of vacuum PMTs especially for large-size noble-liquid detectors in the field of Functional Nuclear Medical Imaging and Direct Dark Matter Detection. We present recent characterization results of a Hybrid-GPM made of three Micropattern Gaseous Structures; a Thick Gaseous Electron Multiplier (THGEM), a Parallel Ionization Multiplier (PIM) and a MICROMesh GAseous Structure (MICROMEGAS),operating in Ne/CF4 (90:10). Gain values close to 10^7 were recorded in this mixture, with 5.9keV x-rays at 1100 mbar, both at room temperature and at that of liquid xenon (T = 171K). The results are discussed in term of scintillation detection. While the present multiplier was investigated without photocathode, complementary results of photoextraction from CsI UV photocathodes are presented in Ne/CH4 (95:5) and CH4 in cryogenic conditions.
7 pages, 6 figures, Proceeding of the NDIP Conference 2011 to be published in NIM A
References in corpus (5)
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- CsI-THGEM gaseous photomultipliers for RICH and noble-liquid detectors
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- First observation of liquid-xenon proportional electroluminescence in THGEM holes
- Liquid Hole Multipliers: bubble-assisted electroluminescence in liquid xenon
- The Thick Gas Electron Multiplier and its derivatives: physics, technologies and applications
- First results of a large-area cryogenic gaseous photomultiplier coupled to a dual-phase liquid xenon TPC
- Multi-layer Thick Gas Electron Multiplier (M-THGEM): a new MPDG structure for high-gain operation at low-pressure