Modeling contamination migration on the Chandra X-ray Observatory: III

Stephen L. O'Dell; Douglas A. Swartz; Neil W. Tice; Paul P. Plucinsky; Catherine E. Grant; Herman L. Marshall; Alexey A. Vikhlinin; Allyn F. Tennant; Matthew T. Dahmer

doi:10.1117/12.2188396

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18 September 2015 Modeling contamination migration on the Chandra X-ray Observatory: III

Stephen L. O'Dell, Douglas A. Swartz, Neil W. Tice, Paul P. Plucinsky, Catherine E. Grant, Herman L. Marshall, Alexey A. Vikhlinin, Allyn F. Tennant, Matthew T. Dahmer

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Proceedings Volume 9601, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIX; 960107 (2015) https://doi.org/10.1117/12.2188396
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

During its first 16 years of operation, the cold (about -60°C) optical blocking filter of the Advanced CCD Imaging Spectrometer (ACIS), aboard the Chandra X-ray Observatory, has accumulated a growing layer of molecular contamination that attenuates low-energy x rays. Over the past few 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.

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Stephen L. O'Dell, Douglas A. Swartz, Neil W. Tice, Paul P. Plucinsky, Catherine E. Grant, Herman L. Marshall, Alexey A. Vikhlinin, Allyn F. Tennant, and Matthew T. Dahmer "Modeling contamination migration on the Chandra X-ray Observatory: III", Proc. SPIE 9601, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIX, 960107 (18 September 2015); https://doi.org/10.1117/12.2188396

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