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Direct observation of the Andreev reflection of a quasiparticle beam by quantum turbulence in superfluid He-3-B.

Research output: Contribution to journalJournal article

Published

Journal publication date05/2003
JournalPhysica B: Condensed Matter
Journal number1
Volume329
Number of pages2
Pages64-65
Original languageEnglish

Abstract

A beam of quasiparticles from a black-body radiator is directed at a localized region of quantum turbulence generated by a vibrating wire resonator driven at super-critical velocity. We are able to measure directly the fraction of the incident quasiparticle beam which is retro-reflected from the turbulence by Andreev processes. Combining these measurements with previous measurements on the spatial extent of the turbulence may allow us to infer the vortex line density.

Bibliographic note

Describes the first direct imaging of a quantum turbulent tangle by the Andreev reflection of a beam of quasiparticle excitations, a novel technique leading to further discoveries in quantum fluids research (see above). Bradley devised and supervised all aspects of this experiment. RAE_import_type : Journal article RAE_uoa_type : Physics