Accurate Thermal Conductance and Impedance Measurements of Transition Edge Sensors |
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Authors: | M. A. Lindeman K. A. Barger D. E. Brandl S. G. Crowder L. Rocks D. McCammon |
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Affiliation: | (1) Department of Physics, University of Wisconsin, Madison, 53706, USA |
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Abstract: | Past measurements of the thermal coupling of superconducting transition edge sensor (TES) calorimeters suspended on SiN membranes produced wide-ranging values for the exponent of the thermal coupling through the membranes. We present a measurement technique that is less susceptible to current dependence of the phase transition than the previous measurements. An initial measurement produced the expected exponent for a 2-D phonon gas: thermal conductance is proportional to T 2. In doing these measurements, we employ a modification to Lindeman’s equivalent circuit technique for measuring TES complex impedance. |
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Keywords: | Thermal conductance Calorimeter Bolometer Impedance Thevenin Norton TES |
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