A low-frequency, high-amplitude, torsional oscillator for turbulence studies in quantum fluids

Guénault, A. M. and McClintock, P. V. E. and Poole, M. and Schanen, R. and Tsepelin, V. and Zmeev, D. E, (2022) A low-frequency, high-amplitude, torsional oscillator for turbulence studies in quantum fluids. arXiv: arXiv:2201. ISSN 2331-8422

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Abstract

We describe a new type of torsional oscillator, suitable for studies of quantum fluids at frequencies of ∼ 100 Hz, but capable of reaching high velocities of up to several cm\,s−1. This requires the oscillator amplitude to exceed 100 μm, which is much too large for a conventional capacitor-driven device. We describe the new geometry for the oscillator, discuss its design, and report our initial tests of its performance.