GL140L Photocathode Granularity Test for High S/n Stability

Details GL140L Photocathode Granularity Test for High S/n Stability GL140L Photocathode Granularity Test for High S/n Stability

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.6209s&link_type=abstract

HST Proposal ID #6209

Physics

Hst Proposal Id #6209 Calibration

Scientific paper

CYCLE 5 calibration of photocathode granularity for domains covered by G140L in SSA and LSA. The signal-to-noise attainable with GHRS in standard ACCUM modes will normally be limited to a few percent by uncalibrated sensitivity variations on the photocathodes. With prior calibration this limitation can be alleviated. This proposal covers only D1 for which the granularity is to be a severe limitation. A test of high S/N calibration stability is made in ECH-A at 1478 A in SSA , a region where independent GTO/OS observations will obtain high S/N (about 500) in a separate star. Region of photocathode ind. meas. for G140M

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