Magnetic calorimeters for high resolution x-ray spectroscopy
2003; American Institute of Physics; Volume: 74; Issue: 9 Linguagem: Inglês
10.1063/1.1597952
ISSN1527-2400
AutoresA. Fleischmann, T. T. Daniyarov, Hannes Rotzinger, Martin Linck, C. Enss, G. M. Seidel,
Tópico(s)Superconductivity in MgB2 and Alloys
ResumoMicrocalorimeters operating at low temperatures have proven to be suitable tools for high resolution x-ray spectroscopy. Metallic magnetic calorimeters (MMCs) are one kind of such detectors. The operation of a MMC is based on the temperature dependence of the magnetization of a paramagnetic material such as Au doped with Er in a small magnetic field. The temperature of a x-ray absorber, in thermal contact with the paramagnetic material, can be monitored with high sensitivity by using a dc superconducting quantum interference device. An energy resolution of one part in 1000 at 6 keV has now been demonstrated for MMCs. We report on the recent progress in the development of MMCs and discuss the limitations of such devices resulting from fundamental noise sources.
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