Title :
Electron drift measurements using self-quenching streamer mode in single wire gas counter
Author :
Widodo, S. ; Iwamoto, O. ; Nohtomi, A. ; Uozumi, Y. ; Sakae, T. ; Ijiri, H. ; Koori, N. ; Matoba, M.
Author_Institution :
Dept. of Nucl. Eng., Kyushu Univ., Fukuoka, Japan
Abstract :
The behavior of the SQS (self-quenching streamer) discharge induced by β-rays in a single wire gas counter was studied, and its applicability to measurements of electron drift has been clarified. It was possible to use the SQS signal from β-ray induced ionization instead of the SQS signal from laser-induced ionization for electron drift measurements. This method is very simple and gives drift velocity data in a wide range of electric field strength, especially at high regions where a uniform field drift counter is not so easy to operate. Ne-based gas mixtures show less saturation of drift velocity than Ar-based gas mixtures for the electric field regions commonly applied for drift counters
Keywords :
diffusion in gases; position sensitive particle detectors; streamer chambers; Ar; Ne; SQS mode; drift velocity; electron drift; self-quenching streamer mode; single wire gas counter; Counting circuits; Electron mobility; Ethanol; Ionization; Laser modes; Performance evaluation; Radiation detectors; Timing; Velocity measurement; Wire;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-0884-0
DOI :
10.1109/NSSMIC.1992.301105
