Hybrid Multi Micropattern Gaseous Photomultiplier for detection of liquid-xenon scintillation
Duval, Samuel · Arazi, Lior · Breskin, Amos · Budnik, Ranny · Chen, Wan-Ting · Carduner, Hervé · Coimbra, A. E. C. · Cortesi, Marco · Kaner, Roy · Cussonneau, Jean-Pierre · Donnard, Jérôme · Lamblin, Jacob · Lemaire, Olivier · Ray, Patrick Le · Lopes, J. A. M. · Hadi, Abdul-Fattah Mohamad · Morteau, Eric · Oger, Tugdual · Santos, J. M. F. dos · Lavina, Luca Scotto · Stutzmann, Jean-Sébastien · Thers, Dominique
الأصل · EN
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 10⁷ 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.
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