Gamma-ray spectrometers using superconducting transition edge sensors with external active feedback bias

D. T. Chow, M. L. Van Den Berg, A. Loshak, Matthias Frank, T. W. Barbee, S. E. Labov

Research output: Contribution to journalConference article

4 Scopus citations

Abstract

We are developing x-ray and gamma-ray spectrometers with high absorption efficiency and high energy-resolution for x-ray and gamma-ray spectroscopy. They are microcalorimeters consisting of a bulk Sn absorber coupled to a Mo/Cu multilayer superconducting transition edge sensor (TES). We have operated these microcalorimeters with an external active feedback bias to linearize the detector response, improve the count rate performance, and extend the detection energy range. We measured an energy resolution of 120 eV FWHM for 60 keV incident gamma-rays with no degradation of resolution from active bias. We present x-ray and gamma-ray results and operation of this detector design in both bias modes.

Original languageEnglish (US)
Pages (from-to)743-746
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume11
Issue number1 I
DOIs
StatePublished - Mar 1 2001
Externally publishedYes
Event2000 Applied Superconductivity Conference - Virginia Beach, VA, United States
Duration: Sep 17 2000Sep 22 2000

Keywords

  • Active feedback bias
  • Bulk absorbers
  • Cryogenic detectors
  • Microcalorimeters
  • Transition-edge sensors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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