NASA NTRS · 20180000741
A Cryogenic Thermal Source for Detector Array Characterization
Abstract
We describe the design, fabrication, and validation of a cryogenically compatible quasioptical thermal source for characterization of detector arrays. The source is constructed using a graphite-loaded epoxy mixture that is molded into a tiled pyramidal structure. The mold is fabricated using a hardened steel template produced via a wire electron discharge machining process. The absorptive mixture is bonded to a copper backplate enabling thermalization of the entire structure and measurement of the source temperature. Measurements indicate that the reflectance of the source is less than 0.001 across a spectral band extending from 75 to 330 gigahertz.
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Chuss, David T., Rostem, Karwan, Wollack, Edward J., Berman, Leah, Colazo, Felipe, DeGeorge, Martin, Helson, Kyle, Sagliocca, Marco. 2017-10-16. A Cryogenic Thermal Source for Detector Array Characterization. https://ntrs.nasa.gov/citations/20180000741
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