COS FUV Recovery from Anomalous Shutdown

Details COS FUV Recovery from Anomalous Shutdown COS FUV Recovery from Anomalous Shutdown

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009hst..prop12431w&link_type=abstract

HST Proposal ID #12431. Cycle 18

Physics

Scientific paper

This proposal consists of the steps for turning on and ramping up the COS FUV high voltage in a conservative manner after a HV anomalous shutdown. This proposal executes the same steps as Cycle 17 proposal 11893. It is divided into two distinct parts with the first consisting of a slow rampup with diagnostics and darks perfomed, followed by a ramp-down, HV off, and setting Flag 3. Time is allotted for UC Berkeley, COS Instrument Scientist, and engineering will examine data dumps, science exposures, and housekeeping telemetry. If all is well, the go-ahead will be given to proceed with the second HV rampup. The second part consists of a normal rampup with diagnostics and darks, followed by a ramp-down, HV off, and setting Flag 3. Again, UC Berkeley, COS Instrument Scientist, and engineering will examine data dumps, science exposures, and housekeeping telemetry. If all is well, this time the go-ahead will be given to clear Flag 3 and precede with normal FUV science programs.;

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