29 August 2017 Microchannel plate life testing for UV spectroscopy instruments
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Abstract
The Emirates Mars Mission (EMM) UV Spectrograph (EMUS) is a far ultraviolet (102 nm to 170 nm) imaging spectrograph for characterization of the Martian exosphere and thermosphere. Imaging is accomplished by a photon counting open-face microchannel plate (MCP) detector using a cross delay line (XDL) readout. An MCP gain stabilization (“scrub”) followed by lifetime spectral line burn-in simulation has been completed on a bare MCP detector at SSL. Gain and sensitivity stability of better than 7% has been demonstrated for total dose of 2.5 × 1012 photons cm−2 (2 C · cm−2 ) at 5.5 kHz mm−2 counting rates, validating the efficacy of an initial low gain full-field scrub.
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N. T. Darling, N. T. Darling, O. H. W. Siegmund, O. H. W. Siegmund, T. Curtis, T. Curtis, J. McPhate, J. McPhate, J. Tedesco, J. Tedesco, S. Courtade, S. Courtade, G. Holsclaw, G. Holsclaw, A. Hoskins, A. Hoskins, S. Al Dhafri, S. Al Dhafri, } "Microchannel plate life testing for UV spectroscopy instruments", Proc. SPIE 10397, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XX, 1039712 (29 August 2017); doi: 10.1117/12.2277343; https://doi.org/10.1117/12.2277343
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