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Proportional counter windows for the Bragg Crystal Spectrometer on AXAFA Bragg Crystal Spectrometer (BCS) using a gas flow proportional counter as its primary detector is among the instruments under development for AXAF. The BCS will employ windows of 1-micron-thick polyimide coated on both sides with 200 A of Al; this window composition, while X-ray transmitting, will leak gas at a lower rate than the polypropylene film-based windows formerly employed. Accounts are given of the results obtained with additional innovative X-ray window materials currently under development, including diamond and Si-enriched Si3N4.
Document ID
19930050401
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Markert, T. H. (NASA Headquarters Washington, DC United States)
Bauer, J. M. (NASA Headquarters Washington, DC United States)
Canizares, C. R. (NASA Headquarters Washington, DC United States)
Isobe, T. (NASA Headquarters Washington, DC United States)
Nenonen, S. (NASA Headquarters Washington, DC United States)
O'Connor, J. (NASA Headquarters Washington, DC United States)
Schattenburg, M. L. (MIT Cambridge, MA, United States)
Flanagan, K. A. (NASA Headquarters Washington, DC United States)
Zombeck, M. V. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1991
Publication Information
Publication: 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)
Publisher: Society of Photo-Optical Instrumentation Engineers
Subject Category
Optics
Accession Number
93A34398
Funding Number(s)
CONTRACT_GRANT: NAGW-2003
CONTRACT_GRANT: NAS8-36748
Distribution Limits
Public
Copyright
Other

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