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Proceedings Paper

Novel methods for cryogenic testing of infrared focal plane arrays in aCo60 radiation environment
Author(s): Robert E. Mills
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Paper Abstract

Co60 sources and test equipment have successfully been integrated to provide total, accumulated gamma dose and debris (delayed) gamma flux testing on a routine basis. Three Co60 sources provide a wide range of testing capabilities and dose rates: (1) one-curie source mated to a custom dewar and blackbody specifically designed for debris gamma testing, (2) a 2200-curie internal irradiator primarily used for discrete component testing, and (3) an 8000-curie Shepherd Cell internal irradiator with custom dewars utilizing graybody IR sources which is capable of complete radiometric characterizations of IR FPAs while being exposed to a wide range of position-selectable gamma fluxes and accommodates both total dose and debris gamma testing. Any of these sources and dewars can be interfaced with customer-specific test equipment, allowing the same test set to be used for clear environment and in-situ radiation testing. This paper describes the radiation sources and their associated dewars, the uses, and the test methodology utilized for testing IR focal plane arrays (FPAs) in the total gamma dose and the debris gamma environments. Examples of test data acquisition and reduction are presented.

Paper Details

Date Published: 1 July 1992
PDF: 11 pages
Proc. SPIE 1686, Test and Evaluation of IR Detectors and Arrays II, (1 July 1992); doi: 10.1117/12.60526
Show Author Affiliations
Robert E. Mills, Hughes Aircraft Co. (United States)

Published in SPIE Proceedings Vol. 1686:
Test and Evaluation of IR Detectors and Arrays II
Forney M. Hoke, Editor(s)

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