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Proceedings Paper

Radiation effects in WFC3 IR detectors
Author(s): 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
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Paper 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.

Paper Details

Date Published: 12 January 2004
PDF: 15 pages
Proc. SPIE 5167, Focal Plane Arrays for Space Telescopes, (12 January 2004); doi: 10.1117/12.508443
Show Author Affiliations
Scott D. Johnson, Global Science and Technology, Inc. (United States)
Augustyn Waczynski, Global Science and Technology, Inc. (United States)
Paul W. Marshall, Consultant (United States)
Elizabeth J. Polidan, Global Science and Technology, Inc. (United States)
Cheryl J. Marshall, NASA Goddard Space Flight Ctr. (United States)
Robert A. Reed, NASA Goddard Space Flight Ctr. (United States)
Randy A. Kimble, NASA Goddard Space Flight Ctr. (United States)
Gregory Delo, Global Science and Technology, Inc. (United States)
David Schlossberg, Sigma Space Corp. (United States)
Anne Marie Russell, Global Science and Technology, Inc. (United States)
Terry Beck, Sigma Space Corp. (United States)
Yiting Wen, Science Systems and Applications, Inc. (United States)
John Yagelowich, NASA Goddard Space Flight Ctr. (United States)
Robert J. Hill, Science Systems and Applications, Inc. (United States)
Edward Wassell, Science Systems and Applications, Inc. (United States)
Edward S. Cheng, Conceptual Analytics LLC (United States)


Published in SPIE Proceedings Vol. 5167:
Focal Plane Arrays for Space Telescopes
Thomas J. Grycewicz; Craig R. McCreight, Editor(s)

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