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In orbit adiabatic demagnetization refrigeration for bolometric and microcalorimetric detectors

Hepburn, I. D., Ade, Peter A. R., Davenport, I., Smith, A. and Sumner, T. J. 1992. In orbit adiabatic demagnetization refrigeration for bolometric and microcalorimetric detectors. 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. 317-320.

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Abstract

The new generation of photon detectors for satellite based mm/submm and X-ray astronomical observations require cooling to temperatures in the range 60 to 300 mK. At present Adiabatic Demagnetization Refrigeration (ADR) is the best proposed technique for producing these temperatures in orbit due to its inherent simplicity and gravity independent operation. For the efficient utilization of an ADR it is important to realize long operational times at base temperature with short recycle times. These criteria are dependent on several parameters; the required operating temperature, the cryogen bath temperature, the amount of heat leakage to the paramagnetic salt, the volume and type of salt and the maximum obtainable magnetic field. For space application these parameters are restricted by the limitations imposed on the physical size, the mass, the available electrical power and the cooling power available. The design considerations required in order to match these parameters are described and test data from a working laboratory system is presented.

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/74992

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