Open AccessDevelopment of an Adiabatic Demagnetization Refrigerator for X-ray Microcalorimeter Operations
Author(s) -
Ryuichi Fujimoto,
Kosuke Sato,
Akane Wada,
Takahiro Yatsu,
Akio Hoshino,
Toshio Murakami,
Keisuke Shinozaki,
N. Kawai,
Shigehiro Nagataki
Publication year - 2010
Publication title -
aip conference proceedings
Language(s) - English
Resource type - Conference proceedings
SCImago Journal Rank - 0.177
H-Index - 75
eISSN - 1551-7616
pISSN - 0094-243X
DOI - 10.1063/1.3509293
Subject(s) - cryostat , refrigerator car , demagnetizing field , adiabatic process , superconductivity , materials science , superconducting magnet , dilution refrigerator , transition edge sensor , paramagnetism , magnet , high temperature superconductivity , bolometer , spectrometer , magnetic refrigeration , x ray , magnetic field , condensed matter physics , nuclear engineering , detector , physics , thermodynamics , optics , magnetization , quantum mechanics , engineering
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. © 2010 American Institute of Physics
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