Title :
Transition condition to the SQS mode of gas counters for heavy charged particles
Author :
Nohtomi, A. ; Sakae, T. ; Matoba, M. ; Koori, N.
Author_Institution :
Dept. of Nucl. Eng., Kyushu Univ., Fukuoka, Japan
fDate :
6/1/1997 12:00:00 AM
Abstract :
A transition condition of α-ray induced SQSs has been investigated with various gas mixtures. For this purpose, obtainable experimental data have been analyzed through a consideration of two newly-introduced quantities: “effective electric-field strength (E eff)” near primary electron avalanches and “average electron density (ρav)” of ionization tracks by α-rays. A result of the analysis indicates that such SQS transitions may occur when the value of Eeff·ρav reaches a certain magnitude. Following this, transition characteristics to the SQS mode have been studied for protons around 10 MeV
Keywords :
alpha-particle detection; position sensitive particle detectors; proton detection; streamer chambers; SQS transitions; alpha-ray induced SQS modes; average electron density; effective electric-field strength; gas counters; gas mixtures; heavy charged particles; ionization tracks; primary electron avalanches; protons; transition condition; Anodes; Art; Counting circuits; Delay; Electron optics; Ionization; Protons; Streaming media; Voltage; Wire;
Journal_Title :
Nuclear Science, IEEE Transactions on
