An adiabatic demagnetisation refrigerator with a mechanical pre-cooler for space applications

Davenport, I. J., Smith, A., Hepburn, I., Ade, Peter A. R. ORCID: https://orcid.org/0000-0002-5127-0401 and Sumner, T. J. 1992. An adiabatic demagnetisation refrigerator with a mechanical pre-cooler for space applications. Presented at: ESA Symposium on Photon Detectors for Space Instrumentation : ESTEC, Noordwijk, The Netherlands, 10- 12 November 1992. Published in: Guyenne, T. D. and Hunt, J. J. eds. Proceedings of an ESA Symposium on Photon Detectors for Space Instrumentation : ESTEC, Noordwijk, The Netherlands, 10- 12 November 1992. ESA SP (356) Paris, France: European Space Agency, pp. 275-279.

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Abstract

An Adiabatic Demagnetization Refrigerator (ADR) suitable for use in space would have applications in the fields of mm/submm and x-ray astronomy. Since ADR's operate in the absence of gravity without the need for highly complex modifications from established laboratory designs, they could offer a considerable advantage over He-3 refrigerators. The concept of an ADR backed by a mechanical pre-cooler is evaluated. Either a second ADR or a recycling Helium bath is used between the ADR and the mechanical cooler. This has the potential for both high reliability and very long operations. A system design which is related to the present development status of mechanical coolers is presented. The performance of such a system is evaluated. The operational parameters addressed include: achievable temperature and stability; hold and recycle times; and residual magnetic field strength.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Publisher:	European Space Agency
ISBN:	9290922664
Last Modified:	28 Oct 2022 09:35
URI:	https://orca.cardiff.ac.uk/id/eprint/74994

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