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Proceedings Paper

In-flight performance of the SUMER microchannel plate detectors
Author(s): Neil W. Griffiths; Sabine Airieau; Oswald H. W. Siegmund
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Paper Abstract

The SUMER spectrograph on the Solar and Heliospheric Observatory utilizes two cross delay-line (XDL) microchannel plate (MCP) photon counting detectors. Detailed housekeeping telemetry from SUMER allow us to track many characteristics of its in-orbit detector behavior. Since there is a finite quantity of charge that can be extracted form an MCP detector, we observe some variation in the response of such a detector over the course of its lifetime. Information from the housekeeping data reveals the expected variation in gain for both spectral and spatial dimensions. We also present SUMER history memory files which illustrate the pattern of count extraction arising from repeated observations of emission line spectra. In addition, we compare pre-flight and in-flight flat fields for both SUMER detectors. The in- flight flat fields include features corresponding to regions of high charge extraction. Evidence for displacement of low gain events is also presented, and the importance of performing a pre-launch MCP 'scrub' is emphasized.

Paper Details

Date Published: 10 November 1998
PDF: 12 pages
Proc. SPIE 3445, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX, (10 November 1998); doi: 10.1117/12.330312
Show Author Affiliations
Neil W. Griffiths, Univ. of California/Berkeley (United States)
Sabine Airieau, Univ. of California/Berkeley (United States)
Oswald H. W. Siegmund, Univ. of California/Berkeley (United States)

Published in SPIE Proceedings Vol. 3445:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX
Oswald H. W. Siegmund; Mark A. Gummin, Editor(s)

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