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The generation of quantum turbulence in He-3-B by a vibrating grid at low temperatures.

Research output: Contribution to journalJournal article

Published

Journal publication date7/09/2006
JournalAmerican Institute of Physics Conference Proceedings
Volume850
Number of pages2
Pages173-174
Original languageEnglish

Abstract

We have measured the onset of quantum turbulence generated by a vibrating grid resonator in He-3-B. Our measurements were carried out in the low temperature regime where the normal fluid component is very dilute and can be described as a gas of ballistic quasiparticles. Consequently, the normal fluid component can not participate in turbulence generation. We have measured the onset of turbulence from the grid motion using two nearby vibrating wire resonators. The vibrating wires show a reduction in thermal quasiparticle damping due to Andreev reflection in the surrounding turbulent velocity field. Our measurements reveal a transition in the transient behavior of the onset of the vorticity signal at the vibrating wire resonators as a function of the grid velocity.