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Heat release, refrigeration and thermometry in3He-4He solutions at very low temperatures

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Abstract

We report on our measurements performed in liquid3He-4He solutions in the microkelvin temperature range at the Bayreuth nuclear demagnetization cryostat. One aspect of our work is the application of the vibrating wire technique for thermometry in the ballistic regime of phase-separated solutions. The establishment of reliable thermometry along with the particular design of our experimental cells enables us to study two main limitations on the minimum temperature of about 100μK achieved in3He-4He solutions so far: the thermal resistance between the liquid and the cell, and the origins of the heat leaks.

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Authors and Affiliations

  1. Physikalisches Institut, Universität Bayreuth, D-95 440, Bayreuth, Germany

    R. König, A. Betat, L. P. Roobol, A. Voncken & F. Pobell

  2. Department of Physics, University of Nottingham, NG7 2RD, Nottingham, UK

    R. König

Authors
  1. R. König
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  2. A. Betat
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  3. L. P. Roobol
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  4. A. Voncken
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  5. F. Pobell
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König, R., Betat, A., Roobol, L.P. et al. Heat release, refrigeration and thermometry in3He-4He solutions at very low temperatures. J Low Temp Phys 101, 107–116 (1995). https://doi.org/10.1007/BF00754566

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