Low Temperature Physics: 24, 69 (1998); https://doi.org/10.1063/1.593539 (3 pages)
Физика Низких Температур: Том 24, Выпуск 2 (Февраль 1998), c. 101-103 ( к оглавлению , назад )
The boundary resistance between superfluid 4He near T l and a solid surface
Haiying Fu, Hanan Baddar, Kerry Kuehn, and Guenter Ahlers
Department of Physics and Center for Nonlinear Science, University of California, Santa Barbara, California 93106, USA
We report high-resolution measurements of the singular contribution Rb to the thermal boundary resistance between a solid surface and superfluid helium near the superfluid-transition temperature Tl. The results confirm the observation by Murphy and Meyer that a gap between the cell end and the sidewall leads to an apparent finite-current contribution to Rb. In the absence of such a gap, overall agreement of Rb with theoretical predictions is very good. Remaining small differences require further investigations. Without a sidewall gap and within our resolution we found no finite-current effects over the range 3.9╣W / cm 2< Q < 221 ╣uW / cm 2.