A new microcalorimeter concept for photon counting x-ray spectroscopy

Details A new microcalorimeter concept for photon counting x-ray spectroscopy A new microcalorimeter concept for photon counting x-ray spectroscopy

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989nimpa.277..657s&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 277, Issue 2-3, p. 657-663.

Physics

7

Scientific paper

We present an innovative approach for performing photon counting X-ray spectroscopy with cryogenic microcalorimeters. The detector concept takes advantage of the temperature dependence of the dielectric constant in ferroelectric materials. A dielectric calorimeter has many potential advantages over traditional resistive devices, particularly in the reduction of Johnson noise. This makes the energy resolution for photon counting spectroscopy limited only to the noise produced by the intrinsic temperature fluctuations of the device. The detector concept is presented and its predicted performance is compared with resistive calorimeters. Calculations have shown that practical instruments operating with an energy resolution less than 20 eV may be possible at 300 mK.

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