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28 November 2000 Measurements with the Chandra X-Ray Observatory's flight contamination monitor
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Abstract
NASA's Chandra X-ray Observatory includes a Flight Contamination Monitor (FCM), a system of 16 radioactive calibration sources mounted on the inside of the Observatory's forward contamination cover. The purpose of the FCM is to verify the ground-to-orbit transfer of the Chandra flux scale, through comparison of data acquired during the ground calibration with those obtained in orbit, immediately prior to opening the Observatory's sun-shade door. Here we report results of these measurements, which limit the absolute value of the change in mirror-detector system response to less than 2% at Ag Lα (3 keV) and Mn Kα (6 keV). This limit is consistent with the prelaunch estimate of less than 10 Å accumulation of molecular contamination between ground calibration and initial on-orbit operations.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ronald F. Elsner, Jeffery J. Kolodziejczak, Stephen L. O'Dell, Douglas A. Swartz, Allyn F. Tennant, and Martin C. Weisskopf "Measurements with the Chandra X-Ray Observatory's flight contamination monitor", Proc. SPIE 4138, X-Ray Optics, Instruments, and Missions IV, (28 November 2000); https://doi.org/10.1117/12.407552
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