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

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arxiv 2201.08503 v1 pith:TFWXSNRA submitted 2022-01-21 cond-mat.other

A. M. Gu'enault (1) , P. V. E. McClintock (1) , M. Poole (1) , R. Schanen (1) , V. Tsepelin (1) , D. Zmeev (1) , D. Schmoranzer (2) , W. F. Vinen (3) ((1) Department of Physics
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Lancaster University Lancaster United Kingdom (2) Faculty of Mathematics Physics Charles University Prague Czech Republic (3) School of Physics Astronomy University of Birmingham United Kingdom)
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classification cond-mat.other
keywords oscillatordescribefluidsquantumstudiestorsionalamplitudecapable
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abstract

We describe a new type of torsional oscillator, suitable for studies of quantum fluids at frequencies of $\sim$ $100$ Hz, but capable of reaching high velocities of up to several cm\,s$^{-1}$. This requires the oscillator amplitude to exceed $100$ $\mu m$, 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.

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