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Hybrid multi micropattern gaseous photomultiplier for detection of liquid-xenon scintillation

2011; Elsevier BV; Volume: 695; Linguagem: Inglês

10.1016/j.nima.2011.11.018

1872-9576

Samuel Duval, L. Arazi, Amos Breskin, R. Budnik, Wan‐Ting Chen, Hervé Carduner, A. E. C. Coimbra, M. Cortesi, Roy Kaner, J. P. Cussonneau, Jérôme Donnard, J. Lamblin, Olivier Lemaire, P. Le Ray, J. A. M. Lopes, Abdul-Fattah Mohamad Hadi, E. Morteau, Tugdual Oger, J.M.F. dos Santos, Luca Scotto Lavina, Jean-Sébastien Stutzmann, D. Thers,

Dark Matter and Cosmic Phenomena

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 5.9 keV x-rays at 1100 mbar, both at room temperature and at that of liquid xenon (T=171 K). 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.