A tuning fork's torsional mode responds to quantum turbulence generated by its own flexural mode, enabling a single-device emitter-detector probe for superfluid 4He.
Quartz Tuning Fork: Thermometer, Pressure- and Viscometer for Helium Liquids
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abstract
Commercial quartz oscillators of the tuning-fork type with a resonant frequency of ~32 kHz have been investigated in helium liquids. The oscillators are found to have at best Q values in the range 10^5-10^6, when measured in vacuum below 1.5 K. However, the variability is large and for very low temperature operation the sensor has to be preselected. We explore their properties in the regime of linear viscous hydrodynamic response in normal and superfluid 3He and 4He, by comparing measurements to the hydrodynamic model of the sensor.
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cond-mat.other 1years
2019 1verdicts
CONDITIONAL 1representative citing papers
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Multimode probing of superfluid $\mathbf{^4He}$ by tuning forks
A tuning fork's torsional mode responds to quantum turbulence generated by its own flexural mode, enabling a single-device emitter-detector probe for superfluid 4He.