Design of a multichannel ultra-high-resolution superconducting gamma-ray spectrometer

Stephan F. Friedrich; Stephane F. Terracol; Toshiyuki Miyazaki; Owen B. Drury; Zaheer A. Ali; Mark F. Cunningham; Thomas R. Niedermayr; Troy W. Barbee Jr.; Jan D. Batteux; Simon E. Labov

doi:10.1117/12.563624

21 October 2004 Design of a multichannel ultra-high-resolution superconducting gamma-ray spectrometer

Stephan F. Friedrich, Stephane F. Terracol, Toshiyuki Miyazaki, Owen B. Drury, Zaheer A. Ali, Mark F. Cunningham, Thomas R. Niedermayr, Troy W. Barbee Jr., Jan D. Batteux, Simon E. Labov

Author Affiliations +

Proceedings Volume 5540, Hard X-Ray and Gamma-Ray Detector Physics VI; (2004) https://doi.org/10.1117/12.563624
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

Superconducting Gamma-ray microcalorimeters operated at temperatures around ~0.1 K offer an order of magnitude improvement in energy resolution over conventional high-purity Germanium spectrometers. The calorimeters consist of a ~1 mm³ superconducting or insulating absorber and a sensitive thermistor, which are weakly coupled to a cold bath. Gamma-ray capture increases the absorber temperature in proportion to the Gamma-ray energy, this is measured by the thermistor, and both subsequently cool back down to the base temperature through the weak link. We are developing ultra-high-resolution Gamma-ray spectrometers based on Sn absorbers and superconducting Mo/Cu multilayer thermistors for nuclear non-proliferation applications. They have achieved an energy resolution between 60 and 90 eV for Gamma-rays up to 100 keV. We also build two-stage adiabatic demagnetization refrigerators for user-friendly detector operation at 0.1 K. We present recent results on the performance of single pixel Gamma-ray spectrometers, and discuss the design of a large detector array for increased sensitivity.

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Stephan F. Friedrich, Stephane F. Terracol, Toshiyuki Miyazaki, Owen B. Drury, Zaheer A. Ali, Mark F. Cunningham, Thomas R. Niedermayr, Troy W. Barbee Jr., Jan D. Batteux, and Simon E. Labov "Design of a multichannel ultra-high-resolution superconducting gamma-ray spectrometer", Proc. SPIE 5540, Hard X-Ray and Gamma-Ray Detector Physics VI, (21 October 2004); https://doi.org/10.1117/12.563624

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