Performance of micro-fabricated magnetic calorimeters arrays for X-ray spectroscopy

Hannes Rotzinger*, J. Adams, S. R. Bandler, J. Beyer, H. Eguchi, E. Figueroa-Feliciano, W. Hsieh, G. M. Seidel, T. Stevenson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)351-356
Number of pages6
JournalJournal of Low Temperature Physics
Volume151
Issue number1-2 PART 1
DOIs
StatePublished - Apr 1 2008

Keywords

  • Low temperature detector
  • Magnetic calorimeter
  • X-ray spectroscopy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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