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Possible vortex production by a vibrating wire in superfluid He-3-B

Research output: Contribution to journalJournal article

Published

Journal publication date05/2000
JournalPhysica B: Condensed Matter
Journal number1-4
Volume280
Number of pages2
Pages128-129
Original languageEnglish

Conference

Conference22nd International Conference on Low Temperature Physics
CountryFinland
CityHELSINKI
Period4/08/9911/08/99

Abstract

We observe spectacular features on the force-velocity characteristic of a vibrating wire resonator in superfluid He-3-B at ultralow temperatures. There are both plateaux and discontinuities in the characteristic. The plateaux seem to have two separate critical velocities where firstly some 'event' occurs, which causes the wire to lose energy and slow down, followed by a second critical velocity where the 'event' decouples. The shape of the pulses so created depends on the precise position on the particular plateau. At the low-velocity end of the plateau, the pulses show a sudden decrease in velocity followed by a gradual growth, whereas at the high-velocity end the pulses consist of a sudden increase in velocity followed by a gradual decrease. Eventually, the pulsing ceases indicating a saturation effect. We speculate that these events are due to vortex creation and annihilation,separation. (C) 2000 Elsevier Science B.V. All rights reserved.