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Proceedings Paper

Modeling contamination migration on the Chandra X-ray Observatory IV
Author(s): Stephen L. O'Dell; Douglas A. Swartz; Neil W. Tice; Paul P. Plucinsky; Herman L. Marshall; Akos Bogdan; Catherine E. Grant; Allyn F. Tennant; Matthew Dahmer
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Paper Abstract

During its first 18 years of operation, the cold (about -60°C) optical blocking filters of the Advanced CCD Imaging Spectrometer (ACIS), aboard the Chandra X-ray Observatory, has accumulated a growing layer of molecular contamination, which attenuates low-energy x rays. Over the past several years, the accumulation rate, spatial distribution, and composition have changed. This evolution has motivated further analysis of contamination migration within and near the ACIS cavity, in part to evaluate potential bake-out scenarios intended to reduce the level of contamination. This paper, the fourth on this topic, reports the results of recent contamination-migration simulations and their relevance to a decision whether to bake-out the ACIS instrument.

Paper Details

Date Published: 29 August 2017
PDF: 10 pages
Proc. SPIE 10397, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XX, 103970C (29 August 2017); doi: 10.1117/12.2274818
Show Author Affiliations
Stephen L. O'Dell, NASA Marshall Space Flight Ctr. (United States)
Douglas A. Swartz, Universities Space Research Association (United States)
Neil W. Tice, Massachusetts Institute of Technology (United States)
Paul P. Plucinsky, Smithsonian Astrophysical Observatory (United States)
Herman L. Marshall, Massachusetts Institute of Technology (United States)
Akos Bogdan, Smithsonian Astrophysical Observatory (United States)
Catherine E. Grant, Massachusetts Institute of Technology (United States)
Allyn F. Tennant, NASA Marshall Space Flight Ctr. (United States)
Matthew Dahmer, Northrop Grumman (United States)


Published in SPIE Proceedings Vol. 10397:
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XX
Oswald H. Siegmund, Editor(s)

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