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Proceedings Paper

Effective area of the AXAF high-resolution camera (HRC)
Author(s): Daniel Patnaude; Deron O. Pease; R. Hank Donnelly; Michael Juda; Christine Jones; Stephen S. Murray; Martin V. Zombeck; Ralph Porter Kraft; Almus T. Kenter; Gary R. Meehan; Ronald F. Elsner; Douglas A. Swartz
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Paper Abstract

The Advanced X-Ray Astrophysics Facility High Resolution Camera was calibrated at NASA's X-Ray Calibration Facility during March and April 1997. We have undertaken an analysis of the effective area of the combined High Resolution Mirror Assembly/High Resolution Camera using all data presently available from these tests. In this contribution we discuss our spectral fitting of the beam-normalization detectors, our method of removing higher order contamination lines present in the spectra, and the corrections for beam non- uniformities. Using an approach based upon the mass absorption cross-section of Cesium Iodide, we determine the quantum efficiency in the microchannel plates. We model the secondary electron absorption depth as a function of energy, which we expect to be relatively smooth. This is then combined with the most recent model of the telescope to determine the ensemble effective area for the HRC. The ensemble effective area is a product of the telescope effective are, the transmission of the UV-Ion shield, and the quantum efficiency of the microchannel plates. We focus our attention on the microchannel plate quantum efficiency, using previous result for the UV-Ion shield transmission and telescope effective area. We also address future goals and concerns.

Paper Details

Date Published: 19 November 1998
PDF: 13 pages
Proc. SPIE 3444, X-Ray Optics, Instruments, and Missions, (19 November 1998); doi: 10.1117/12.331294
Show Author Affiliations
Daniel Patnaude, Smithsonian Astrophysical Observatory (United States)
Deron O. Pease, Smithsonian Astrophysical Observatory (United States)
R. Hank Donnelly, Smithsonian Astrophysical Observatory (United States)
Michael Juda, Smithsonian Astrophysical Observatory (United States)
Christine Jones, Smithsonian Astrophysical Observatory (United States)
Stephen S. Murray, Smithsonian Astrophysical Observatory (United States)
Martin V. Zombeck, Smithsonian Astrophysical Observatory (United States)
Ralph Porter Kraft, Smithsonian Astrophysical Observatory (United States)
Almus T. Kenter, Smithsonian Astrophysical Observatory (United States)
Gary R. Meehan, Smithsonian Astrophysical Observatory (United States)
Ronald F. Elsner, NASA Marshall Space Flight Ctr. (United States)
Douglas A. Swartz, Universities' Space Research Association (United States)


Published in SPIE Proceedings Vol. 3444:
X-Ray Optics, Instruments, and Missions
Richard B. Hoover; Arthur B. C. Walker, Editor(s)

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