The energy resolution of proportional counters with thin anode diameters down to 5 [mu]m

Conference · Mon Aug 01 04:00:00 EDT 1994 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6884291

Tokanai, F; Sakurai, H; Noma, M; Gunji, S; Ueno, H; Anzai, T; Kato, F; Hoshina, T ^[1]

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1. Yamagata Univ. (Japan)

An investigation of the energy resolution of a conventional cylindrical proportional counter with thin anode diameters from 5 [mu]m to 20[mu]m has been carried out for pure argon and argon + 10% methane at 1 atm. With argon + 10% methane the energy resolutions for 5 [mu]m, 10[mu]m, and 20[mu]m anode wires were 13.5%, 13.7%, and 14.1% at 5.9 keV and a gas gain [approximately]250, respectively. An analysis of the first Townsend ionization coefficient shows that the superior energy resolution for the thinner anode wire is due to the effect of the stronger reduced electric field at the beginning portion of the avalanche region. This has important implications for microstrip gas counter where the (firmly supported) anodes can be made arbitrarily small, far finer than those possible in conventional wire chambers.

• OSTI ID: 6884291
• Report Number(s): CONF-931051--
• Conference Information: Journal Name: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 41:4Pt1
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
DATA
DISPERSIONS
ELECTRIC DISCHARGES
ENERGY RESOLUTION
EXPERIMENTAL DATA
INFORMATION
MEASURING INSTRUMENTS
MIXTURES
NUMERICAL DATA
PERFORMANCE
PROPORTIONAL COUNTERS
RADIATION DETECTORS
RESOLUTION
TOWNSEND DISCHARGE