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The non-equilibrium response of a high-resolution Ti/Au X-ray microcalorimeter |
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| Authors: | S. Terracol T. Miyazaki U. Morita Y. Ishisaki K. Tanaka K. Mitsuda S. Friedrich |
| Affiliation: | a Lawrence Livermore National Laboratory, 7000 East Av, P.O. Box 808, L-270, Livermore, CA 94550, USA b Tokyo Metropolitan University, Minami-Osawa 1-1, Hachioji-shi, Tokyo 192-0397, Japan c Seiko Instruments Inc, 563 Takatsuka-Shinden, Matsudo-shi, Chiba 270-2222, Japan d Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagowa 229-8810, Japan |
| Abstract: | We have studied the response of a high resolution Ti/Au transition edge sensor (TES) microcalorimeter with an energy resolution of 6.2±0.7 eV at 1.5 keV and 7.8±0.9 eV at 6.4 keV. We find that the sensitivity ≡R/T dR/dT of the TES varies significantly along the superconducting-to-normal transition that the bias point traverses during a pulse. Furthermore, is reduced significantly during a pulse compared to its equilibrium value calculated from the DC characteristics. This leads to an overestimate of the expected energy resolution when basing the prediction on the equilibrium sensitivity. |
| Keywords: | Author Keywords: X-ray microcalorimeter Transition edge sensor Non-equilibrium sensitivity |
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