Vibrating Wire Thermometry in Superfluid 3He |
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Authors: | C B Winkelmann E Collin Yu M Bunkov H Godfrin |
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Affiliation: | 1. Centre de Recherches sur les Très Basses Températures, 25 av. des Martyrs, B.P. 166, 38042, Grenoble cedex 9, France
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Abstract: | We report systematic measurements of the response of a Vibrating Wire Resonator (VWR) in normal and superfluid liquid 3He. Special attention has been paid to the hydrodynamic regime of the superfluid B-phase, where the response parameters of the VWR do not follow a simple law. We show that a simple interpolation between the region where first order slip-corrections can be applied and the ballistic regime is insufficient. Measuring an empirical effective viscosity, we propose a temperature calibration method which allows the use of VWRs as a secondary thermometer at intermediate and high pressures in the temperature range 0.2 T c < T < 50 mK. |
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