High-resolution hard x-ray and gamma-ray spectrometers based on superconducting absorbers coupled to superconducting transition edge sensors

Marcel L. van den Berg; Daniel T. Chow; Alex Loshak; Mark F. Cunningham; Troy W. Barbee Jr.; Matthias A. Frank; Simon E. Labov

doi:10.1117/12.409140

13 December 2000 High-resolution hard x-ray and gamma-ray spectrometers based on superconducting absorbers coupled to superconducting transition edge sensors

Marcel L. van den Berg, Daniel T. Chow, Alex Loshak, Mark F. Cunningham, Troy W. Barbee Jr., Matthias A. Frank, Simon E. Labov

Author Affiliations +

Proceedings Volume 4140, X-Ray and Gamma-Ray Instrumentation for Astronomy XI; (2000) https://doi.org/10.1117/12.409140
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

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.

Citation Download Citation

Marcel L. van den Berg, Daniel T. Chow, Alex Loshak, Mark F. Cunningham, Troy W. Barbee Jr., Matthias A. Frank, and Simon E. Labov "High-resolution hard x-ray and gamma-ray spectrometers based on superconducting absorbers coupled to superconducting transition edge sensors", Proc. SPIE 4140, X-Ray and Gamma-Ray Instrumentation for Astronomy XI, (13 December 2000); https://doi.org/10.1117/12.409140

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