Abstract
A sensitive Kapton foil capacitance sensor, with size of 9.5 mm×4.5 mm, has been developed and used as a thermometer at ultra-low temperatures down to 1.2 mK and in high magnetic fields. There is no visible magnetic field dependence up to 15 T. The sensor was calibrated with 3He melting pressure thermometer (MPT) and vibrating wire (VW) viscometer. With the silver powder sintered heat exchanger sandwich-like design, the thermal relaxation time is as short as a few minutes at the base temperature. The low temperature (below 1.2 K) reproducibility has been tested and is satisfied within experimental errors.
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Xia, J.S., Choi, H.C., Lee, Y. et al. Kapton Capacitance Thermometry at Low Temperatures and in High Magnetic Fields. J Low Temp Phys 148, 899–902 (2007). https://doi.org/10.1007/s10909-007-9433-7
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DOI: https://doi.org/10.1007/s10909-007-9433-7