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Thermal-Response Time of Superconducting Transition-Edge Microcalorimeters



Kent D. Irwin, Gene C. Hilton, David A. Wollman, John M. Martinis


We investigate limits on the thermal-response time of supercondcuting transition-edge microcalorimeters. For operation at 0.1 K, we show that the lower limit on the response time of a superconducting transition-edge microcalorimeter is of order 1 5m due to the heat diffusion time, electrical instabilities, the amplifier noise, and the critical current of the superconducting film. The response time is not limited by self-heating effects and is independent of the intended photon energy. However, design constraints associated with the inductance of the bias circuit make it difficult to achieve the fastest response times for devices with heat capacities high enough for x-ray and gamma-ray detection.
Journal of Applied Physics


microcalorimeter, superconducting, thermal-response


Irwin, K. , Hilton, G. , Wollman, D. and Martinis, J. (1998), Thermal-Response Time of Superconducting Transition-Edge Microcalorimeters, Journal of Applied Physics (Accessed May 21, 2024)


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Created March 31, 1998, Updated October 12, 2021