WFC3 Ambient Testing: UVIS Dark Current Rate

Details WFC3 Ambient Testing: UVIS Dark Current Rate WFC3 Ambient Testing: UVIS Dark Current Rate

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007wfc..rept...10h&link_type=abstract

Instrument Science Report WFC3 2007-10, 9 pages

Physics

Hubble Space Telescope, Hst, Space Telescope Science Institute, Wide Field Camera 3, Wfc3, Uvis

Scientific paper

Ground testing of WFC3 under ambient conditions during April of 2007 was performed in order to prepare for upcoming thermal vacuum testing. As a part of this ambient testing, the dark current rate of the spare UVIS package (UVIS build 2) was measured while the CCD was operating at a temperature of -54oC. This temperature is significantly higher than the nominal operating temperature of -83oC, leading to a higher overall dark current rate, as well as a larger population in the high dark current tail of the distribution. Measured dark current values at the peak of the distributions corresponding to the 4 amplifiers were 9.0 ? 13.9 e-/pix/hour.

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