Performance of Micro-fabricated Magnetic Calorimeters Arrays for X-Ray Spectroscopy |
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| Authors: | H. Rotzinger J. Adams S. R. Bandler J. Beyer H. Eguchi E. Figueroa-Feliciano W. Hsieh G. M. Seidel T. Stevenson |
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| Affiliation: | (1) NASA Goddard Space Flight Center, Greenbelt, MD, USA;(2) Physikalisch-Technische Bundesanstalt, Berlin, Germany;(3) Massachusetts Institute of Technology, Boston, USA;(4) Brown University, Providence, USA |
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| Abstract: | We have been developing array technology for fabricating magnetic calorimeters for X-ray astronomy. The magnetization change in each pixel of the paramagnetic sensor material due to the heat input of an absorbed X-ray is sensed by a meander shaped coil. With this geometry it is possible to obtain excellent energy sensitivity, low magnetic cross-talk and large format arrays fabricated on wafers that are separate from the SQUID read-out. A magnetic bias field for each pixel is generated by the use of a persistent current that is stored. We report on the results from our prototype arrays, which are coupled to low noise DC-SQUIDs. The first test results are presented and the sensitivity is compared with calculations. |
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| Keywords: | Magnetic calorimeter X-ray spectroscopy Low temperature detector |
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