Thermal architecture for the SPIDER flight cryostat

Gudmundsson, J. E., Ade, Peter A. R. ORCID: https://orcid.org/0000-0002-5127-0401, Amiri, M., Benton, S. J., Bihary, R., Bock, J. J., Bond, J. R., Bonetti, J. A., Bryan, S. A., Burger, B., Chiang, H. C., Contaldi, C. R., Crill, B. P., Dore, O., Farhang, M., Filippini, J., Fissel, L. M., Gandilo, N. N., Golwala, S. R., Halpern, M., Hasselfield, M., Hilton, G., Holmes, W., Hristov, V. V., Irwin, K. D., Jones, W. C., Kuo, C. L., MacTavish, C. J., Mason, P. V., Montroy, T. E., Morford, T. A., Netterfield, C. B., O'Dea, D. T., Rahlin, A. S., Reintsema, C. D., Ruhl, J. E., Runyan, M. C., Schenker, M. A., Shariff, J. A., Soler, J. D., Trangsrud, A., Tucker, Carole Elizabeth ORCID: https://orcid.org/0000-0002-1851-3918, Tucker, R. S. and Turner, A. D. 2010. Thermal architecture for the SPIDER flight cryostat. Presented at: Millimeter, submillimeter, and far-infrared detectors and instrumentation for astronomy V, San Diego, CA, USA, 29 June-2 July 2010. Published in: Holland, Wayne S. and Zmuidzinas, Jonas eds. Proceedings of the SPIE conference on Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V held in San Diego CA on 29 June 2010. Proceedings of SPIE (7741) Bellingham, WA: SPIE, 77411M. 10.1117/12.857925

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Abstract

We describe the cryogenic system for SPIDER, a balloon-borne microwave polarimeter that will map 8% of the sky with degree-scale angular resolution. The system consists of a 1284 L liquid helium cryostat and a 16 L capillary-filled superfluid helium tank, which provide base operating temperatures of 4 K and 1.5 K, respectively. Closed-cycle 3He adsorption refrigerators supply sub-Kelvin cooling power to multiple focal planes, which are housed in monochromatic telescope inserts. The main helium tank is suspended inside the vacuum vessel with thermally insulating fiberglass flexures, and shielded from thermal radiation by a combination of two vapor cooled shields and multi-layer insulation. This system allows for an extremely low instrumental background and a hold time in excess of 25 days. The total mass of the cryogenic system, including cryogens, is approximately 1000 kg. This enables conventional long duration balloon flights. We will discuss the design, thermal analysis, and qualification of the cryogenic system.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Publisher:	SPIE
ISBN:	9780819482310
ISSN:	0277-786X
Last Modified:	20 Oct 2022 09:47
URI:	https://orca.cardiff.ac.uk/id/eprint/33129

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