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Proceedings Paper

Proportional counter windows for the Bragg crystal spectrometer on AXAF
Author(s): Thomas H. Markert; James M. Bauer; Claude R. Canizares; Takashi Isobe; Seppo Arvo Anter Nenonen; J. O'Connor; Mark L. Schattenburg; Kathryn A. Flanagan; Martin V. Zombeck
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Paper Abstract

A 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.

Paper Details

Date Published: 1 October 1991
PDF: 12 pages
Proc. SPIE 1549, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy II, (1 October 1991); doi: 10.1117/12.48357
Show Author Affiliations
Thomas H. Markert, Massachusetts Institute of Technology (United States)
James M. Bauer, SUNY/Stony Brook (United States)
Claude R. Canizares, Massachusetts Institute of Technology (United States)
Takashi Isobe, Massachusetts Institute of Technology (United States)
Seppo Arvo Anter Nenonen, Massachusetts Institute of Technology (Finland)
J. O'Connor, Massachusetts Institute of Technology (United States)
Mark L. Schattenburg, Massachusetts Institute of Technology (United States)
Kathryn A. Flanagan, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Martin V. Zombeck, Harvard-Smithsonian Ctr. for Astrophysics (United States)


Published in SPIE Proceedings Vol. 1549:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy II
Oswald H. W. Siegmund; Richard E. Rothschild, Editor(s)

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