In orbit adiabatic demagnetization refrigeration for bolometric and microcalorimetric detectors

Details In orbit adiabatic demagnetization refrigeration for bolometric and microcalorimetric detectors In orbit adiabatic demagnetization refrigeration for bolometric and microcalorimetric detectors

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.356..317h&link_type=abstract

In ESA, Proceedings of an ESA Symposium on Photon Detectors for Space Instrumentation p 317-320 (SEE N94-15025 03-19)

Astronomy and Astrophysics

Astronomy

Bolometers, Demagnetization, Radiation Measuring Instruments, Refrigerators, Spacecraft Instruments, Calorimeters, Design Analysis, Photons, Requirements, X Ray Astronomy

Scientific paper

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.

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