Thermal Vacuum 2: measures of the IR background and on-orbit predictions (SMS IR01S18)

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Hubble Space Telescope, Hst, Space Telescope Science Institute, Wide Field Camera 3, Wfc3, Therman Vacuum 2, Tv2

Scientific paper

The total background flux seen by the WFC3-IR detector has been measured during the June-August 2007 Thermal Vacuum 2 (TV2) Campaign. The measured values agree within ~10% with our model. We predict the thermal background that will be seen on orbit with both the current (FPA129) and next (FPA165) IR FPAs, showing that it will fall well within the 0.4e/s limit stated by the CEI specification document, including detector the dark current (peak value). We also verify the general compliance of WFC3 estimated background with all relevant CEI specifications.

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