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