Proportional counter windows for the Bragg Crystal Spectrometer on AXAF

Details Proportional counter windows for the Bragg Crystal Spectrometer on AXAF Proportional counter windows for the Bragg Crystal Spectrometer on AXAF

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991spie.1549..408m&link_type=abstract

In: EUV, X-ray, and gamma-ray instrumentation for astronomy II; Proceedings of the Meeting, San Diego, CA, July 24-26, 1991 (A93

Physics

Optics

2

Bragg Angle, Crystal Optics, Polypropylene, Proportional Counters, X Ray Astrophysics Facility, Aluminum Coatings, Satellite-Borne Instruments

Scientific paper

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.

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