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Modeling Contamination Migration on the Chandra X-Ray Observatory - IVDuring its first 18 years of operation, the cold (about -60degC) 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.
Document ID
20170008755
Document Type
Conference Paper
Authors
O'Dell, Stephen L.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Swartz, Douglas A.
(Universities Space Research Association Huntsville, AL, United States)
Tice, Neil William
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Plucinsky, Paul P.
(Smithsonian Astrophysical Observatory Cambridge, MA, United States)
Marshall, Herman L.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Bogdan, Akos
(Universities Space Research Association Huntsville, AL, United States)
Grant, Catherine E.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Tennant, Allyn F.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Dahmer, Matthew
(Northrop Grumman Information Technology, Inc. Cambridge, MA, United States)
Date Acquired
September 11, 2017
Publication Date
August 6, 2017
Subject Category
Astrophysics
Report/Patent Number
MSFC-E-DAA-TN46438
Meeting Information
Meeting: Optics and Photonics Conference
Location: San Diego, CA
Country: United States
Start Date: August 6, 2017
End Date: August 8, 2017
Sponsors: International Society for Optical Engineering
Funding Number(s)
CONTRACT_GRANT: NNM13AA43C
WBS: WBS 397424
CONTRACT_GRANT: NNG06EO90A
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
X-ray astronomy CCDs
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