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The Onset of Vortex Production by a Vibrating Wire in Superfluid He-3-B

Research output: Contribution to journalJournal article

Published

Journal publication date06/2013
JournalJournal of Low Temperature Physics
Journal number5-6
Volume171
Number of pages7
Pages582-588
Original languageEnglish

Abstract

We present measurements of the force-velocity response of a vibrating wire resonator in superfluid He-3-B at very low temperatures. At low velocities the response is dominated by intrinsic (vacuum) damping whilst at high velocities it is dominated by pair-breaking. At intermediate velocities there is a series of small plateaus where the velocity often shows small oscillations. We believe that the behaviour results from the stretching of vortices pinned to the wire. The vortices grow and self-reconnect, emitting a vortex ring. The behaviour is very sensitive to the presence of surrounding vortices generated by a neighbouring vibrating wire.