Chinese Science Bulletin

, Volume 47, Issue 2, pp 162–164 | Cite as

Dynamic behavior of the He II-He I phase transition under gravity

  • Peng Zhang


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.


He II-He I interface gravity phase transition 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Khalatnikov, I. M., Introduction to the theory of superfluidity, New York: Benjamin, 1965.Google Scholar
  2. 2.
    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.CrossRefGoogle Scholar
  3. 3.
    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.CrossRefGoogle Scholar
  4. 4.
    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.CrossRefGoogle Scholar

Copyright information

© Science in China Press 2002

Authors and Affiliations

  • Peng Zhang
    • 1
  1. 1.Institute of Refrigeration and CryogenicsShanghai Jiao Tong UniversityShanghaiChina

Personalised recommendations