Title :
Dependence of the performance of CsI-covered microstrip plate VUV photosensors on geometry: experimental results
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 :
The behavior of a xenon-filled microstrip gas chamber (MSGC) instrumented with a microstrip plate with eight different microstrip geometries is reported. The best energy resolution achieved for 5.9-keV and for 22.1-keV X-rays was 13.6% and 7.0%, respectively. The same microstrip plate covered with a CsI film was used in place of the photomultiplier tube to detect the vacuum ultraviolet (VUV) scintillation light produced in a driftless xenon-filled gas proportional scintillation counter. The relative amplitude, energy resolution, optical positive feedback, and photoelectron extraction efficiency are discussed. The energy resolution obtained for 5.9-keV X-rays was 11.4%, which is better than that achieved with a standard proportional counter.
Keywords :
X-ray detection; proportional counters; ultraviolet detectors; 22.1 keV; 5.9 keV; CsI; CsI film; CsI microstrip plate; MSGC; VUV photosensors; X-rays; Xe; amplitude; energy resolution; microstrip gas chamber; optical positive feedback; photoelectron extraction efficiency; Electron tubes; Energy resolution; Geometry; Instruments; Microstrip; Optical feedback; Optical films; Photomultipliers; Solid scintillation detectors; X-rays;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2001 IEEE
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-7324-3
DOI :
10.1109/NSSMIC.2001.1009710
