Title :
Optical imaging capillary gas proportional counter with Penning mixtures
Author :
Masuda, T. ; Sakurai, H. ; Inoue, Y. ; Gunji, S. ; Asamura, K.
Author_Institution :
Dept. of Phys., Yamagata Univ., Japan
Abstract :
The gas mixture of Ar+8%CH4+2%TMA has been applied for an optical imaging gas proportional counter with a capillary plate. The basic performance of the Capillary Gas Proportional Counter (CGPC) were investigated for the charge signal and the light signal. The gas gain was approximately 70 times greater than Ar+10%CH4 and the gas mixture operates at the gap voltage 220 V lower than the Ar+10%CH4 indicating the Penning effect of TMA. The energy resolutions of the charge signal and the light signal were 20.8% and 26.6% for 55 Fe 5.9 keV X rays, respectively. From the cluster analysis of the photo-electrons track due to 22 keV X-ray, it is implied that the CGPC with the gas mixture of Ar+8%CH4+2%TMA can detect the initial point of the photo-electron track due to X-rays
Keywords :
Penning ionisation; X-ray detection; argon; gas mixtures; proportional counters; Ar; Penning mixtures; TMA; capillary plate; charge signal; gap voltage; gas gain; gas mixture; light signal; optical imaging capillary gas proportional counter; photo-electron track; Charge coupled devices; Charge-coupled image sensors; Clouds; Counting circuits; Electrons; Energy resolution; Image analysis; Optical imaging; X-ray detectors; X-ray imaging;
Conference_Titel :
Nuclear Science Symposium, 1999. Conference Record. 1999 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-5696-9
DOI :
10.1109/NSSMIC.1999.845793
