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

Volume

1

fYear

1996

fDate

2-9 Nov 1996

Firstpage

534

Abstract

Self-quenching streamers (SQSs) induced by charged particles in gas counters are classified into two types on the basis of their formation mechanisms: photo-mediated SQS and ionization-track induced SQS. The transition condition of α-ray induced SQS has been investigated as a typical example of the ionization-track induced SQS by heavy charged particles. For this purpose, obtainable experimental data are compiled and reanalyzed. An effective electric field, E_eff, and average electron density of an α-ray ionization track, ρ_av, are newly introduced and examined with that data. A result of the analysis indicates that the SQS transitions may occur when E_eff·ρ_av reaches a certain value. Following this, the transition characteristics to the SQS mode for protons around 10 MeV are investigated through an experiment

Keywords

electron density; ionisation; particle tracks; streamer chambers; α-particle; 10 MeV; E_eff; SQS mode; charged particles; effective electric field; electron density; gas counters; heavy charged particles; ionization track; ionization-track induced SQS; photo-mediated SQS; protons; self-quenching streamers; transition condition; Art; Counting circuits; Delay; Electron optics; Head; Ionization; Particle tracking; Protons; Radiative recombination; Streaming media;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium, 1996. Conference Record., 1996 IEEE

Conference_Location

Anaheim, CA

ISSN

1082-3654

Print_ISBN

0-7803-3534-1

Type

conf

DOI

10.1109/NSSMIC.1996.591053

Filename

591053