16 September 1994 Soft x-ray quantum efficiency of microchannel plates with CsI and KBr photocathodes
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Abstract
The Advanced X-Ray Astrophysics Facility (AXAF) is a high spatial resolution X-ray observatory scheduled for launch in 1998. One of its two focal plane instruments is the High Resolution Camera (HRC). The HRC consists of two microchannel plate detectors with photocathodes of CsI and KBR, respectively. Current approaches to modeling the HRC detector efficiency have focused on the response of the photocathode over the energy range 0.1 to 10 keV. In this paper, we present recent laboratory measurements of the quantum efficiency of coated and uncoated microchannel plates as a function of energy and angle of incidence of the X-Ray. An empirical model is fit to the data, and the results are used to predict the efficiency of HRC at the focal plane.
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Vincent D. Rose, Vincent D. Rose, Kathryn A. Flanagan, Kathryn A. Flanagan, Joshua Lessing, Joshua Lessing, D. Kearns, D. Kearns, Stephen S. Murray, Stephen S. Murray, Rachel K. Roll, Rachel K. Roll, Martin V. Zombeck, Martin V. Zombeck, } "Soft x-ray quantum efficiency of microchannel plates with CsI and KBr photocathodes", Proc. SPIE 2280, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V, (16 September 1994); doi: 10.1117/12.186835; https://doi.org/10.1117/12.186835
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