WFC3 Ambient Testing: UVIS Dark Current Rate
نویسنده
چکیده
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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