Computer Science – Performance
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hst..prop.3971m&link_type=abstract
HST Proposal ID #3971
Computer Science
Performance
Hst Proposal Id #3971
Scientific paper
In order to surpress Quantum Efficiency Hystersis (QEH) in the WFPC CCDs, the CCDS must be conditioned by flooding with Ultra- violet light. This procedure is not successful when performed on CCDs at their normal operating temperatures and therefore requires that the CCDs be warmed to approximately room temperature. The UV Flood of the WFPC CCDs is accomplished by bringing sunlight onto the CCD detectors through the WFPC's UV Light Pipe with the UV Flip Mirror in the "Flood" position. However, prior to flooding the CCDs, any contaminates which may have been deposited on the CCD field flatting windows must be removed. Failure to remove such contaminates may result in their being permanently polymerized onto these windows by the UV light and this will likely cause a permanent degradation of the WFPC's scientific performance. Therefore a staged high temperature decontamination procedure must be performed and its success verified before the UV light exposure part of the flood sequence can proceed. Revised 10/09/91 by Blacker to match SON of UV FLood Implementation Plan.
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