Physics – Atomic Physics
Scientific paper
Nov 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1159..414r&link_type=abstract
IN: EUV, X-ray, and gamma-ray instrumentation for astronomy and atomic physics; Proceedings of the Meeting, San Diego, CA, Aug.
Physics
Atomic Physics
1
Calorimeters, Inductance, Thermometers, X Rays, Alpha Particles, Aluminum, Heat Measurement, Superconducting Films, Temperature Dependence, Thermal Noise, Tin
Scientific paper
Conventional X-ray microcalorimeters have so far used ionimplanted resistors for thermometers. Recently, however, several new methods for sensing small temperature changes have been suggested that are nondissipative. Such devices may have intrinsically better energy resolution by eliminating the Johnson noise present in resistive devices. The use of kinetic inductance thermometers for X-ray microcalorimeters is being investigated. This technique exploits the strong temperature dependence of magnetic penetration depth of thin superconducting films. The 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, aluminum will be replaced with titanium or another material with a suitable critical temperature and the device will be operated at 0.3 K. At this temperature, the energy resolution from thermal noise should be sufficiently good to allow X-ray detection.
Kelley Richard L.
Moseley Samuel Harvey
Rawley Gayle L.
Szymkowiak Andrew E.
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