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Overlight testing for the James Webb Space Telescope

Author:
Bernard J. Rauscher   Scott R. Antonille   Nicholas Boehm   Pamela S. Davila   Roger Foltz   Matthew A. Greenhouse   Jeffrey S. Gum   Robert J. Hill   Randy A. Kimble   Don Lindler   Timothy J. Madison   D. Brent Mott   Raymond G. Ohl   and Augustyn Waczynski  


Journal:
Publications of the Astronomical Society of the Pacific


Issue Date:
2013


Abstract(summary):

We describe the overlight test that was done for JWST''s Teledyne H2RG HgCdTe near-infrared detector arrays. We projected many very bright =632.8nm spots onto one flight representative, substrate-removed, HgCdTe 5m cutoff detector array. We allowed individual spots to burn in for as long as approximate to approximate to 1000s before turning off the laser. We did not detect any permanent change in detector performance for extreme over illuminations as bright as 320Wpixel(-1) (1Wm(-2)) after the array had been returned to ambient laboratory temperature and pressure. The brightest individual spot contained roughly 4mW of power spread over a 100m diameter circular area. This is brighter than the brightest lasers that are planned for use during JWST integration and testing. It is also approximate to approximate to 10(3)xx brighter than any 632.8nm astronomical source in the night sky.


Page:
1465-1473


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