Author/Authors :
Ullom، نويسنده , , J.N. and Doriese، نويسنده , , W.B. and Beall، نويسنده , , J.A. and Duncan، نويسنده , , W.D. and Ferreira، نويسنده , , Jack L. and Hilton، نويسنده , , G.C. and Horansky، نويسنده , , R.D. and Irwin، نويسنده , , K.D. and Jach، نويسنده , , T. and Mates، نويسنده , , B. and Miller، نويسنده , , N.A. and O’Neil، نويسنده , , G.C. and Reintsema، نويسنده , , C.D. and Ritchie، نويسنده , , N. and Schmidt، نويسنده , , D.S. and Vale، نويسنده , , L.R. and Xu، نويسنده , , Y. and Zink، نويسنده , , B.L. and Hoover، نويسنده , , A. S. Rudy، نويسنده , , C.R. and Tournear، نويسنده , , D.M. and Vo، نويسنده , , D.T. and Rabin، نويسنده , , M.W.، نويسنده ,
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.
