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

Davenport, I. J., Smith, A., Hepburn, I., Ade, Peter A. R. 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 , vol. 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: 04 Jun 2017 08:15
URI: http://orca.cf.ac.uk/id/eprint/74994

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