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Preliminary measurements of Andreev reflection of quasiparticles by turbulence in superfluid He-3.

Bradley, D. Ian and Fisher, Shaun N. and Guénault, A.M. and Lowe, M. R. and Pickett, George R. and Rahm, A. (2001) Preliminary measurements of Andreev reflection of quasiparticles by turbulence in superfluid He-3. Journal of Low Temperature Physics, 124 (1-2). pp. 113-122. ISSN 0022-2291

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Abstract

We present preliminary measurements of Andreev scattering of quasiparticles from turbulence in the B-phase of superfluid He-3-B. The turbulence is generated by a vibrating wire resonator driven above its pair-breaking critical velocity. The vortices intercept a beam of quasiparticles generated by a nearby black-body radiator. A substantial fraction of the incident quasiparticles are retro-reflected back into the radiator by Andreev scattering processes. The resulting temperature rise within the radiator provides a direct measurement of the flux of quasiparticles Andreev reflected. The technique provides a sensitive probe of superfluid turbulence in the ultra-low temperature regime.

Item Type: Article
Journal or Publication Title: Journal of Low Temperature Physics
Uncontrolled Keywords: helium-3 ; superfluid ; turbulence
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 23573
Deposited By: Dr Richard P. Haley
Deposited On: 03 Feb 2009 16:50
Refereed?: Yes
Published?: Published
Last Modified: 17 Jul 2013 10:23
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/23573

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