Long-term gain variation in the FUSE detectors

David J. Sahnow

doi:10.1117/12.551849

11 October 2004 Long-term gain variation in the FUSE detectors

David J. Sahnow

Proceedings Volume 5488, UV and Gamma-Ray Space Telescope Systems; (2004) https://doi.org/10.1117/12.551849
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

The Far Ultraviolet Spectroscopic Explorer (FUSE) satellite has been in orbit and collecting scientific data since mid-1999. The FUSE detector system contains two large-format microchannel plate detectors with double delay line anodes. Both detectors have performed well since the beginning of the mission, but as they have aged their gain characteristics have changed. Variations in the amount of charge extracted as a function of position on the detector has caused time- and wavelength-dependent changes to the detector performance; corrections for these effects must be applied to the data in the science data pipeline in order to minimize the introduction of artifacts into the calibrated spectra. The gain characteristics of the detectors and the ways in which they have changed since launch are discussed, as are mitigation strategies in both the use of the detectors and the interpretation of the data.

Citation Download Citation

David J. Sahnow "Long-term gain variation in the FUSE detectors", Proc. SPIE 5488, UV and Gamma-Ray Space Telescope Systems, (11 October 2004); https://doi.org/10.1117/12.551849

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