1 September 1995 Synchrotron calibration of alkali halide coated microchannel plate detectors in the 50- to 350- and 2000- to 6000-eV bands
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Abstract
We report on the results of a synchrotron calibration of two identical microchannel plate (MCP) detectors carried out at the CCL Daresbury synchrotron radiation source (SRS). The SRS was run with low ring current to allow operation of the detectors in photon-counting mode. Both detectors were half coated with KBr and half with CsI. Detector 1 was calibrated, for both photocathodes, in 1 eV steps over the energy range 50 - 350 eV, on SRS beamline 6.1. We present measurements of edge-related absolute quantum efficiency features arising from both the photocathodes and the underlying lead silicate glass. We also describe the results of charge abstraction lifetests of Detector 1, made possible by the small cross section and relatively high peak count rate of the line 6.1 x-ray beam. A preliminary analysis of the calibration of detector 2 in 3 eV steps over the energy range 2000 - 6000 eV (on IRC beamline 4.2) is also presented.
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Sarah E. Pearce, John Ernest Lees, James F. Pearson, George W. Fraser, Adam N. Brunton, Kathryn A. Flanagan, Almus T. Kenter, Marco Barbera, V. Dhanak, A. Robinson, D. Teehan, "Synchrotron calibration of alkali halide coated microchannel plate detectors in the 50- to 350- and 2000- to 6000-eV bands", Proc. SPIE 2518, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VI, (1 September 1995); doi: 10.1117/12.218386; https://doi.org/10.1117/12.218386
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