First optical observations of superfluid He3

A. J. Manninen; J.P. Pekola; G. M. Kira; J. P. Ruutu; A. V. Babkin; H. Alles; O. V. Lounasmaa

doi:10.1103/PhysRevLett.69.2392

First optical observations of superfluid He3

A. J. Manninen, J.P. Pekola, G. M. Kira, J. P. Ruutu, A. V. Babkin, H. Alles, O. V. Lounasmaa

Not published at VTT

Helsinki University of Technology

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Abstract

The shape of the free surface of rotating superfluid B3 has been investigated optically. The drastic change in viscosity at the superfluid transition was seen directly. Focusing of light reflected from the liquid surface and expansion of the light beam when it travels through the He3 sample show that the meniscus of the rotating superfluid has the same parabolic shape as that of the normal liquid, which implies an equilibrium density of vortices. The fountain effect in B3 could be seen directly as well: Liquid accumulates into the illuminated region.

Original language	English
Pages (from-to)	2392-2395
Number of pages	4
Journal	Physical Review Letters
Volume	69
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.69.2392
Publication status	Published - 1992
MoE publication type	A1 Journal article-refereed

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10.1103/PhysRevLett.69.2392

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AU - Babkin, A. V.

AU - Alles, H.

AU - Lounasmaa, O. V.

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AB - The shape of the free surface of rotating superfluid B3 has been investigated optically. The drastic change in viscosity at the superfluid transition was seen directly. Focusing of light reflected from the liquid surface and expansion of the light beam when it travels through the He3 sample show that the meniscus of the rotating superfluid has the same parabolic shape as that of the normal liquid, which implies an equilibrium density of vortices. The fountain effect in B3 could be seen directly as well: Liquid accumulates into the illuminated region.

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First optical observations of superfluid He3

Abstract

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