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Proceedings Paper

High-resolution hard x-ray and gamma-ray spectrometers based on superconducting absorbers coupled to superconducting transition edge sensors
Author(s): Marcel L. van den Berg; Daniel T. Chow; Alex Loshak; Mark F. Cunningham; Troy W. Barbee; Matthias A. Frank; Simon E. Labov
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Paper Abstract

We are developing detectors based on bulk superconducting absorbers coupled to superconducting transition edge sensors (TES) for high-resolution spectroscopy of hard X-rays and soft gamma-rays. We have achieved an energy resolution of 70 eV FWHM at 60 keV using a 1 X 1 X 0.25 mm3 Sn absorber coupled to a Mo/Cu multilayer TES with a transition temperature of 100 mK. The response of this detector is compared with a simple model using only material properties data and characteristics derived from IV-measurements. We have also manufactured detectors using superconducting absorbers with a higher stopping power, such as Pb and Ta. We present our first measurements of these detectors, including the thermalization characteristics of the bulk superconducting absorbers. The differences in performance between the detectors are discussed and an outline of the future direction of our detector development efforts is given.

Paper Details

Date Published: 13 December 2000
PDF: 9 pages
Proc. SPIE 4140, X-Ray and Gamma-Ray Instrumentation for Astronomy XI, (13 December 2000); doi: 10.1117/12.409140
Show Author Affiliations
Marcel L. van den Berg, Lawrence Livermore National Lab. (United States)
Daniel T. Chow, Lawrence Livermore National Lab. and Univ. of California/Davis (United States)
Alex Loshak, Lawrence Livermore National Lab. (United States)
Mark F. Cunningham, Lawrence Livermore National Lab. and Univ. of California/Davis (United States)
Troy W. Barbee, Lawrence Livermore National Lab. (United States)
Matthias A. Frank, Lawrence Livermore National Lab. (United States)
Simon E. Labov, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 4140:
X-Ray and Gamma-Ray Instrumentation for Astronomy XI
Kathryn A. Flanagan; Oswald H. W. Siegmund, Editor(s)

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