Correcting for the Unexpected: Dead Anodes, Glitches, Hotspots and Gain Drift in JEM-X Data Processing

Details Correcting for the Unexpected: Dead Anodes, Glitches, Hotspots and Gain Drift in JEM-X Data Processing Correcting for the Unexpected: Dead Anodes, Glitches, Hotspots and Gain Drift in JEM-X Data Processing

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.552..879o&link_type=abstract

Proceedings of the 5th INTEGRAL Workshop on the INTEGRAL Universe (ESA SP-552). 16-20 February 2004, Munich, Germany. Scientific

Computer Science

Performance

Scientific paper

Since launch, the JEM-X units have developed a number of interesting effects, which have been observed in the data from the microstrip detectors. These anomalies must be detected and corrected automatically in the ISDC pipeline processing using the Instrument Specific Software (ISSW). The design of the ISSW left room for such corrections, though the exact form of the corrections was unknown before launch. These are implemented through correction tables, instrument characteristics, event flagging and selection, and performance monitoring. We discuss the various correction strategies for dead anodes, gain glitches, hotspots, and gain drift. Many of these problems stem from cosmic ray interactions with the detector gas and microstrip plate. Ion drift through the microstrip substrate also plays a role. While these effects are well beyond our control, the JEM-X experience will certainly benefit future space-based missions using microstrip technology. The original poster of this paper can be seen at: http://www.dsri.dk/ oxborrow/sdast/int5Poster.pdf Key words: data processing software; instrumentation; X-ray astronomy; microstrip gas chambers.

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