Development of an Adiabatic Demagnetization Refrigerator for X-ray Microcalorimeter Operations

Details Development of an Adiabatic Demagnetization Refrigerator for X-ray Microcalorimeter Operations Development of an Adiabatic Demagnetization Refrigerator for X-ray Microcalorimeter Operations

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1279..309f&link_type=abstract

DECIPHERING THE ANCIENT UNIVERSE WITH GAMMA-RAY BURSTS. AIP Conference Proceedings, Volume 1279, pp. 309-311 (2010).

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Calorimeters, Magnetic Cooling, Superconducting Magnets, Intergalactic Matter, Calorimeters, Cryogenics, Refrigerators, Low-Temperature Detectors, And Other Low-Temperature Equipment, Superconducting Magnets, Magnetic Levitation Devices, Intergalactic Matter, Quasar Absorption And Emission-Line Systems, Lyman Forest

Scientific paper

An X-ray microcalorimeter is a non-dispersive spectrometer that measures the energy of an incident X-ray photon as a temperature rise. Operated at <0.1 K, it achieves very high resolving power. We are developing X-ray microcalorimeters for future γ-ray burst observations, and are now setting up a compact adiabatic demagnetization refrigerator (ADR) for X-ray microcalorimeter operations. We fabricated a paramagnetic salt pill, and integrated it with a superconducting magnet and a heat-switch in a dedicated He cryostat. By applying a magnetic field of 2.6 T at the bath temperature of 1.8 K, it achieved 0.1 K. The attainable temperature and the hold time were, however, limited due to unexpected heat load. We also successfully measured a resistance-temperature characteristics of a superconducting transition edge.

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