Abstract
The phase transition of superfluid helium (He II) to normal fluid helium (He I) is studied in this note. The He II-He I interface is found to move upwards under finite heat current. The temperature tracks are measured by four high resolution temperature sensors (HRTs). And the shifting of the λ point temperature (phase transition temperature) along the cell is studied experimentally and theoretically. Under gravity, the shifting of the λ point temperature increases with the pressure. The experimental results agree well with the theoretical ones.
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References
Khalatnikov, I. M., Introduction to the theory of superfluidity, New York: Benjamin, 1965.
Fu, H. Y., Baddar, H., Kuehn, K. et al., A high-resolution thermometer for the range from 1.6 to 5 K, J. of Low Temp. Physics, 1998, 111(1/2): 49.
Ahlers, G., Finite-size and gravity effects on the thermal conductivity of 4He near the λ line, J. of Low Temp. Physics, 1999, 115(3/4): 143.
Baddar, H., Ahlers, G., Kuehn, K. et al. Thermal resistance of 4He below but very near the superfluid transition, J. of Low Temp. Physics, 2000, 119(1/2): 1.
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Zhang, P. Dynamic behavior of the He II-He I phase transition under gravity. Chin.Sci.Bull. 47, 162–164 (2002). https://doi.org/10.1360/02tb9038
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DOI: https://doi.org/10.1360/02tb9038