JPL Technical Report Server

WFIRST Coronagraph Detector Trap Modeling Results and Improvements

Show simple item record Effinger, Robert Nemati, Bijan Rizzo, Maxime Morrissey, Patrick Harding, Leon Bottom, Michael Pontrelli, Donald Demers, Richard Bush, Nathan Hall, David Clarke, Andrew Holland, Andrew 2020-05-11T22:17:18Z 2020-05-11T22:17:18Z 2018-06-10
dc.identifier.citation High Energy, Optical, and Infrared Detectors for Astronomy VIII, Austin, Texas, June 10 - 15, 2018 en_US
dc.identifier.clearanceno 18-2523
dc.description.abstract The WFIRST coronagraph is being designed to detect and characterize mature exoplanets through the starlight reflected from their surfaces and atmospheres. The light incident on the detector from these distant exoplanets is estimated to be on the order of a few photons per pixel per hour. To measure such small signals, the project has baselined the CCD201 detector made by e2v, a low-noise and high-efficiency electron-multiplying charge-coupled device (EMCCD), and has instituted a rigorous test and modeling program to characterize the device prior to flight. An important consideration is detector performance degradation over the proposed mission lifetime due to radiation exposure in space. To quantify this estimated loss in performance, the project has built a detector trap model that takes into account detailed trap interactions at the sub-pixel level, including stochastic trap capture and release, and the deferment of charge into subsequent pixels during parallel and serial clocking of the pseudo-two-phase CCD201 device. This paper describes recent detector trap model improvements and modeling results. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2018 en_US
dc.subject WFIRST en_US
dc.subject coronagraph en_US
dc.subject exoplanet en_US
dc.subject detector en_US
dc.subject CCD en_US
dc.subject EMCCD en_US
dc.subject trap modeling en_US
dc.title WFIRST Coronagraph Detector Trap Modeling Results and Improvements en_US
dc.type Preprint en_US

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