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Proceedings Paper

Progress In Kinetic Inductance Thermometers For X-Ray Calorimeters
Author(s): G. L. Rawley; R. L. Kelley; S. H. Moseley; A. E. Szymkowiak
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Paper Abstract

Conventional X-ray microcalorimeters have so far used ion-implanted resistors for thermometers. Recently, however, several new methods for sensing small temperature changes have been suggested that are non-dissipative. Such devices may have intrinsically better energy resolution by eliminating the Johnson noise present in resistive devices. We are investigating the use of kinetic inductance thermometers for X-ray microcalorimeters. This technique exploits the strong temperature dependence of magnetic penetration depth of thin superconducting films. Our prototype system, designed for operation at 1.5 K, uses films of aluminum and tin. Once the expected temperature sensitivity and alpha particle detection have been demonstrated, we expect to replace the aluminum with titanium or another material with a suitable critical temperature and operate the device at 0.3 K. At this temperature the energy resolution from thermal noise should be sufficiently good to allow X-ray detection.

Paper Details

Date Published: 27 November 1989
PDF: 9 pages
Proc. SPIE 1159, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy and Atomic Physics, (27 November 1989); doi: 10.1117/12.962599
Show Author Affiliations
G. L. Rawley, NASA/Goddard Space Flight Center (United States)
R. L. Kelley, NASA/Goddard Space Flight Center (United States)
S. H. Moseley, NASA/Goddard Space Flight Center (United States)
A. E. Szymkowiak, NASA/Goddard Space Flight Center (United States)


Published in SPIE Proceedings Vol. 1159:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy and Atomic Physics
Charles J. Hailey; Oswald H. W. Siegmund, Editor(s)

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