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Publication Citation: Multiplexed microcalorimeter arrays for precision measurements from microwave to gamma-ray wavelengths

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Author(s): Joel N. Ullom; William B. Doriese; James A. Beall; William Duncan; S. L. Ferreira; Gene C. Hilton; Robert D. Horansky; Kent D. Irwin; Terrence J. Jach; John A. Mates; Nathan A. Tomlin; Galen C. O'Neil; Carl D. Reintsema; Nicholas Ritchie; Daniel R. Schmidt; Leila R. Vale; Yizi Xu; Barry L. Zink; Andrew Hoover; Clifford R. Rudy; Derek Tournear; Duc Vo; Michael W. Rabin;
Title: Multiplexed microcalorimeter arrays for precision measurements from microwave to gamma-ray wavelengths
Published: August 21, 2007
Abstract: Cryogenic microcalorimeters are a promising technology for ultrasensitive measurements of electromagnetic radiation from microwave to gamma-ray wavelengths. Cryogenic microcalorimeters derive their exquisite sensitivity from the minimal thermal noise at typical operating temperatures near 0.1 K. The core technology of the microcalorimeters under development at NIST is independent of the application wavelength: thin-film thermometers whose temperature and resistance change in response to absorbed energy. However the absorbing structures used to couple radiation into the thermometers depend strongly on the application wavelength. Here, we describe microcalorimeter technology and its application to microwave, X-ray, and gamma-ray measurements. In particular, we present results from a 13 pixel gamma-ray microcalorimeter array with a coadded energy resolution of 51 eV FWHM at 103 keV and a single pixel with resolution of 27 eV FWHM at 103 keV. One application for gamma-ray microcalorimeters is to deconvolve the complex spectrum of a mixture of Pu isotopes near 100 keV (Fig. 2).
Citation: Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment
Volume: 579
Issue: 1
Pages: pp. 161 - 164
Keywords: gamma-ray detection;microbolometers;microcalorimeters;nuclear spectroscopy;transition-edge sensors
Research Areas:
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