NICMOS Dark Current Anomaly: Test Results

Details NICMOS Dark Current Anomaly: Test Results NICMOS Dark Current Anomaly: Test Results

Mar 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000nicm.rept....2b&link_type=abstract

Instrument Science Report NICMOS 00-002, 12 pages

Physics

Hubble Space Telescope, Hst, Space Telescope Science Institute, Nicmos

Scientific paper

We report on the results of a laboratory test program to investigate the nature of the NICMOS dark current anomaly. The test was designed to investigate one proposed mechanism of signal electrons - excited into the conduction band by infrared photons - being stored at low temperatures in charge traps throughout the detector material and released during warmup. The test did not reproduce the bump, and the proposed scenario could not be confirmed. The nature of the anomaly thus remains unexplained. We discuss this result with regard to possible alternative explanations and options for testing them.

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