Beeman, Jeff, Haller, Eugene E., Collins, P., Hargrave, Peter Charles ![]() ![]() |
Abstract
Photoconductor and bolometer arrays used in cryogenic telescopes often suffer from response variations to a given photon flux. Thermal drifts, ionizing radiation absorption, and changes in optical components and their alignment can all effect photometric accuracy. A stable, low power, in-situ calibration lamp can help quantify and mitigate these effects without substantially diminishing cryogen (and therefore observation) lifetime. We have developed a small, lightweight IR source, based on a reverse-bolometer approach, that can achieve a greybody output (10K to 300K nominal) with a few mW input power. They have survived cryogenic shake testing, are repeatable within 0.8% over 94,000 cycles, and can be mounted directly to a cryogenic surface. Design details and performance results will be discussed.
Item Type: | Conference or Workshop Item (Poster) |
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Date Type: | Completion |
Status: | Unpublished |
Schools: | Physics and Astronomy |
Subjects: | Q Science > QB Astronomy |
Additional Information: | Poster Session 3.11 |
Related URLs: | |
Last Modified: | 27 Oct 2022 09:38 |
URI: | https://orca.cardiff.ac.uk/id/eprint/66984 |
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