Title :
A comparative study of different microstrip plate geometries for CsI-based UV photosensors working in a reflective mode
Author :
Freitas, D.S.A.P. ; Veloso, J.F.C.A. ; Dos Santos, J.M.F. ; Conde, C.A.N.
Author_Institution :
Dept. de Fisica, Coimbra Univ., Portugal
Abstract :
A study by numerical simulation of the performance of 8 different microstrip plate (MSP) chambers filled with xenon at the pressure of 10 5 Pa is carried out. The anode width is fixed at 10 μm but the cathode width ranges from 80 to 320 μm with variable anode-to-cathode distances (from 10 to 55 μm). Simulation results are presented for the avalanche multiplication factors at a certain drift position and gains for the various geometries. The amount of optical positive feedback is also estimated for the various geometries, since this is a determinant factor for the use of a CsI-covered MSP chamber, as a VUV photosensor for detection of the scintillation light of a Gas Proportional Scintillation Counter. For this purpose, the best MSP geometry studied is the one with 160 μm cathodes and cathode-to-anode gaps of 55 μm
Keywords :
caesium compounds; multiwire proportional chambers; photodetectors; solid scintillation detectors; ultraviolet detectors; xenon; CsI; CsI-based UV photosensors; VUV photosensor; Xe; anode-to-cathode distances; avalanche multiplication factors; drift position; gas proportional scintillation counter; microstrip plate geometries; optical positive feedback; reflective mode; Anodes; Cathodes; Geometrical optics; Geometry; Microstrip; Numerical simulation; Optical feedback; Solid modeling; Solid scintillation detectors; Xenon;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2000 IEEE
Conference_Location :
Lyon
Print_ISBN :
0-7803-6503-8
DOI :
10.1109/NSSMIC.2000.949252
