A High Energy Resolution Gamma-Ray TES Microcalorimeter with Fast Response Time

We report on the development of the fast response gamma-ray TES microcalorimeter composed of a bulk Sn absorber coupled to a Ti/Au TES. In order to realize a TES microcalorimeter with a large absorber and a fast response time, besides taking saturation and linearity into account, study of the effect...

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Published inJournal of low temperature physics Vol. 151; no. 1-2; pp. 430 - 435
Main Authors Oshima, T., Yamakawa, Y., Kurabayashi, H., Hoshino, A., Ishisaki, Y., Ohashi, T., Mitsuda, K., Tanaka, K.
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.04.2008
Subjects
Characterization and Evaluation of Materials
Condensed Matter Physics
Magnetic Materials
Magnetism
Physics
Physics and Astronomy
85.25.Oj
Transition edge sensor
Gamma-ray detectors
07.85.Fv
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Summary:We report on the development of the fast response gamma-ray TES microcalorimeter composed of a bulk Sn absorber coupled to a Ti/Au TES. In order to realize a TES microcalorimeter with a large absorber and a fast response time, besides taking saturation and linearity into account, study of the effect of thermal diffusion in the absorber on energy resolution is essential. Therefore, we performed 3 dimensional simulations using SPICE to calculate the effect of thermal diffusion in the absorber on energy resolution. By fabricating a device with the optimized heat capacity of the absorber and the thermal conductance between the absorber and the TES based on the simulation result, we have demonstrated an energy resolution of 38.4±0.9 eV at 60 keV with a time constant of 0.5 ms.
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ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-007-9671-8