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Critical flow of superfluid helium-4 through a submicron aperture: width of the critical transition

✍ Scribed by W. Zimmermann Jr; O. Avenel; E. Varoquaux

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 221 KB
Volume: 165-166
Category: Article
ISSN: 0921-4526
DOI: 10.1016/s0921-4526(90)81224-c

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✦ Synopsis

We have observed the critical onset of dissipation in the flow of superfluid 4He through a submicron aperture as a function of velocity to have a finite width that increases with temperature. The results suggest a thermal activation barrier of the form &(l-v/vc,,) with Eo of the order of 1.5x10-21 J.

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