A model for the operation of helium-filled proportional counter at low temperatures near 4.2 K

Authors
Masaoka, S Katano, KA Kishimoto, S Isozumi, Y
Citation
S. Masaoka et al., A model for the operation of helium-filled proportional counter at low temperatures near 4.2 K, NUCL INST B, 171(3), 2000, pp. 360-372
Citations number
32
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
ISSN journal
0168583X → ACNP
Volume
171
Issue
3
Year of publication
2000
Pages
360 - 372
Database
ISI
SICI code
0168-583X(200011)171:3<360:AMFTOO>2.0.ZU;2-M
Abstract
In order to understand the operation of helium-filled proportional counter (HFPC) from the standpoint of fundamental atomic and molecular processes, w e have surveyed previous works on collision processes in discharged helium gas. By analyzing gas gain curve, after-pulses and discharge current experi mentally observed at 4.2 K, the electron avalanche and the secondary electr on emission from cathode have been related to the collision processes in he lium. A simplified model for the HFPC operation at low temperatures near 4. 2 K has been constructed with the related processes. (C) 2000 Elsevier Scie nce B.V. All rights reserved.