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Record Details

Record 46 of 9660
Characteristics of a high pressure gas proportional counter filled with xenon
Author and Affiliation:
Sakurai, H.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Ramsey, B. D.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Abstract: The characteristics of a conventional cylindrical geometry proportional counter filled with high pressure xenon gas up to 10 atm. were fundamentally investigated for use as a detector in hard X-ray astronomy. With a 2 percent methane gas mixture the energy resolutions at 10 atm. were 9.8 percent and 7.3 percent for 22 keV and 60 keV X-rays, respectively. From calculations of the Townsend ionization coefficient, it is shown that proportional counters at high pressure operate at weaker reduced electric field than low pressure counters. The characteristics of a parallel grid proportional counter at low pressure showed similar pressure dependence. It is suggested that this is the fundamental reason for the degradation of resolution observed with increasing pressure.
Publication Date: Jan 01, 1991
Document ID:
19930050380
(Acquired Dec 28, 1995)
Accession Number: 93A34377
Subject Category: INSTRUMENTATION AND PHOTOGRAPHY
Document Type: Conference Paper
Publication Information: In: EUV, X-ray, and gamma-ray instrumentation for astronomy II; Proceedings of the Meeting, San Diego, CA, July 24-26, 1991 (A93-34376 13-35); p. 20-27.; (SEE A93-34376)
Publisher Information: Society of Photo-Optical Instrumentation Engineers, Bellingham, WA, United States
Financial Sponsor: NASA; United States
Organization Source: NASA Marshall Space Flight Center; Huntsville, AL, United States
Description: 8p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ELECTRON CLOUDS; GAS DETECTORS; GAS PRESSURE; X RAY ASTRONOMY; XENON; ELECTRIC FIELDS; GAS MIXTURES; HIGH PRESSURE; IONIZATION COEFFICIENTS
Imprint And Other Notes: In: EUV, X-ray, and gamma-ray instrumentation for astronomy II; Proceedings of the Meeting, San Diego, CA, July 24-26, 1991 (A93-34376 13-35), p. 20-27.
Availability Source: Other Sources
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