Author/Authors :
Duval، نويسنده , , Samuel and Arazi، نويسنده , , Lior and Breskin، نويسنده , , Amos and Budnik، نويسنده , , Ranny and Chen، نويسنده , , Wan-Ting and Carduner، نويسنده , , Hervé and Coimbra، نويسنده , , A.E.C. and Cortesi، نويسنده , , Marco and Kaner، نويسنده , , Roy and Cussonneau، نويسنده , , Jean-Pierre and Donnard، نويسنده , , Jerome and Lamblin، نويسنده , , Jacob and Lemaire، نويسنده , , Olivier and Le R، نويسنده ,
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 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.
Keywords :
Liquid xenon , Cryogenics , Photon detectors , Micropattern gaseous detectors (THGEM , MICROMEGAS) , Solid photocathode (CsI) , Pim
