Hysteresis, switching and anomalous behaviour of a quartz tuning fork in superfluid 4He

Bradley, Ian and Fear, Matthew and Fisher, Shaun and Guénault, Tony and Haley, Richard and Lawson, Christopher and Pickett, George and Schanen, Roch and Tsepelin, Viktor and Wheatland, Louise (2014) Hysteresis, switching and anomalous behaviour of a quartz tuning fork in superfluid 4He. Journal of Low Temperature Physics, 175 (1-2). pp. 379-384. ISSN 0022-2291

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We have been studying the behaviour of commercial quartz tuning forks immersed in superfluid 4He and driven at resonance. For one of the forks we have observed hysteresis and switching between linear and non-linear damping regimes at temperatures below 10 mK. We associate linear damping with pure potential flow around the prongs of the fork, and non-linear damping with the production of vortex lines in a turbulent regime. At appropriate prong velocities, we have observed metastability of both the linear and the turbulent flow states, and a region of intermittency where the flow switched back and forth between each state. For the same fork, we have also observed anomalous behaviour in the linear regime, with large excursions in both damping, resonant frequency, and the tip velocity as a function of driving force.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Low Temperature Physics
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This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.
Uncontrolled Keywords:
?? superfluid he-4tuning forkcritical velocityturbulencematerials science(all)atomic and molecular physics, and opticscondensed matter physics ??
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Deposited On:
18 Dec 2013 13:46
Last Modified:
28 Apr 2024 23:36