Title :
Generation of SQS in quenching gas (CH4) of proportional counter and related problems
Author :
Ijiri, Hidenobu ; Watanabe, Yukinobu ; Uozumi, Yusuke ; Nohtomi, Akihiko ; Widodo, Susilo ; Sakae, T. ; Matoba, Masam ; Koori, Norihiko
Author_Institution :
Kyushu Univ., Fukuoka, Japan
fDate :
8/1/1992 12:00:00 AM
Abstract :
Two topics on the phenomena in proportional counters are reported. One is the observation of the SQS transition in pure methane gas under irradiation by 4.5-keV X-rays. The effect of a small amount of argon on the SQS transition was investigated with gas mixtures (CH4:Ar) at various mixing ratios. The SQS transition was not observed in pure methane gas, although it was observed still in the gas mixture of 99.8:0.2. The other was the measurement of electron drift characteristics with a single-wire gas counter operated in the SQS transition regions. The counter gas used was a mixture of argon and methane to which ethanol vapor was added. From a comparison with the proportional mode, the use of the SQS mode is recommended to obtain a better time resolution in the application of drift counters
Keywords :
proportional counters; streamer chambers; 4.5 keV; Ar-methane mixtures; SQS mode; SQS transition; drift counters; electron drift characteristics; ethanol vapor; proportional counters; pure methane gas; quenching gas; single-wire gas counter; Anodes; Argon; Counting circuits; Gases; Voltage; X-rays;
Journal_Title :
Nuclear Science, IEEE Transactions on
