Vortex nucleation in superfluid 4He probed by 3He impurities

E. Varoquaux; G.G. Ihas; O. Avenel; R. Aarts

doi:10.1103/PhysRevLett.70.2114

Vortex nucleation in superfluid ⁴He probed by ³He impurities

E. Varoquaux, G.G. Ihas, O. Avenel, R. Aarts

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Abstract

The critical velocity for the onset of phase slips in the flow of superfluid ⁴He
through a micro-orifice has been found to be strongly affected at temperatures below ∼0.1 K by minute quantities of ³He impurities, in the few parts per billion range. It is shown that this effect yields essential information on the vortex nucleation mechanism and in particular the local superfluid velocity at which vortices are formed, which is 22 m/s in these experiments.

Original language	English
Pages (from-to)	2114-2117
Journal	Physical review letters
Volume	70
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.70.2114
Publication status	Published - 5 Apr 1993
Externally published	Yes

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abstract = "The critical velocity for the onset of phase slips in the flow of superfluid 4He through a micro-orifice has been found to be strongly affected at temperatures below ∼0.1 K by minute quantities of 3He impurities, in the few parts per billion range. It is shown that this effect yields essential information on the vortex nucleation mechanism and in particular the local superfluid velocity at which vortices are formed, which is 22 m/s in these experiments.",

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Vortex nucleation in superfluid ⁴He probed by ³He impurities

Abstract

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