Radiation effects in WFC3 IR detectors

Scott D. Johnson; Augustyn Waczynski; Paul W. Marshall; Elizabeth J. Polidan; Cheryl J. Marshall; Robert A. Reed; Randy A. Kimble; Gregory Delo; David Schlossberg; Anne Marie Russell; Terry Beck; Yiting Wen; John Yagelowich; Robert J. Hill; Edward Wassell; Edward S. Cheng

doi:10.1117/12.508443

12 January 2004 Radiation effects in WFC3 IR detectors

Scott D. Johnson, Augustyn Waczynski, Paul W. Marshall, Elizabeth J. Polidan, Cheryl J. Marshall, Robert A. Reed, Randy A. Kimble, Gregory Delo, David Schlossberg, Anne Marie Russell, Terry Beck, Yiting Wen, John Yagelowich, Robert J. Hill, Edward Wassell, Edward S. Cheng

Author Affiliations +

Proceedings Volume 5167, Focal Plane Arrays for Space Telescopes; (2004) https://doi.org/10.1117/12.508443
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

A Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) flight-like IR detector was tested for radiation hardness by exposing it to high energy protons while operating at the nominal flight temperature of 150 K. The detector is a 1.7 μm cutoff HgCdTe detector with a CdZnTe substrate. The device is hybridized to a silicon multiplexer. The detector response was tested for gradually increasing fluence from less than 1x10³ to a total of 5x10⁹ 63 MeV protons/cm². Dark current changes were evaluated after each step. An increase in dark current and new hot pixels were observed after large steps of irradiation. The increased dark current was observed to partially anneal at 190K and fully anneal at room temperature. Radiation effects, hot pixel distribution, and results of annealing at different temperatures are presented here.

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Scott D. Johnson, Augustyn Waczynski, Paul W. Marshall, Elizabeth J. Polidan, Cheryl J. Marshall, Robert A. Reed, Randy A. Kimble, Gregory Delo, David Schlossberg, Anne Marie Russell, Terry Beck, Yiting Wen, John Yagelowich, Robert J. Hill, Edward Wassell, and Edward S. Cheng "Radiation effects in WFC3 IR detectors", Proc. SPIE 5167, Focal Plane Arrays for Space Telescopes, (12 January 2004); https://doi.org/10.1117/12.508443

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