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Decay of quantum turbulence generated by a vibrating grid at low temperatures in superfluid He-3-B.

Research output: Contribution to journalJournal article

Published

Journal publication date7/09/2006
JournalAIP Conference Proceedings
Volume850
Number of pages2
Pages175-176
Original languageEnglish

Abstract

We describe measurements of the decay of quantum turbulence produced by a vibrating grid in superfluid He-3-B at low temperatures. Two nearby NbTi vibrating wire resonators at different distances from the grid are used to detect the turbulence via a reduction in the quasiparticle damping owing to Andreev reflection by the flow around the vortex lines. The decay time constant of this turbulence, after stopping the grid motion, is longer at the wire furthest from the grid. This suggests that either the tangle evolves and moves away from the grid once the grid motion has been stopped, or that there is a faster decay mechanism in operation close to the grid.