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

Research output: Contribution to journalJournal article

<mark>Journal publication date</mark>07/2001
<mark>Journal</mark>Journal of Low Temperature Physics
Issue number1-2
Number of pages10
Pages (from-to)113-122
Publication statusPublished
Original languageEnglish


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.