Overlight testing for the James Webb Space Telescope
| Autor: | D. Brent Mott, Robert J. Hill, Randy A. Kimble, Roger Foltz, Pamela S. Davila, Scott Antonille, Jeffrey S. Gum, Bernard J. Rauscher, Augustyn Waczynski, Matthew A. Greenhouse, Timothy J. Madison, Nicholas Boehm, Raymond G. Ohl, Don J. Lindler |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Publications of the Astronomical Society of the Pacific. 125:1465-1473 |
| ISSN: | 1538-3873 0004-6280 |
| DOI: | 10.1086/674176 |
| Popis: | We describe the "overlight" test that was done for JWST's Teledyne H2RG HgCdTe near-infrared detector arrays. We projected many very bright λ = 632.8 nm spots onto one flight representative, substrate-removed, HgCdTe 5 μm cutoff detector array. We allowed individual spots to "burn in" for as long as ≈1000 s before turning off the laser. We did not detect any permanent change in detector performance for extreme over illuminations as bright as 320 μW pixel-1 (≤ 1 μW μm-2) after the array had been returned to ambient laboratory temperature and pressure. The brightest individual spot contained roughly 4 mW of power spread over a 100 μm diameter circular area. This is brighter than the brightest lasers that are planned for use during JWST integration and testing. It is also ≈103× brighter than any 632.8 nm astronomical source in the night sky. |
| Databáze: | OpenAIRE |
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