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Translational oscillations of a microsphere in superfluid helium

Jäger, J. ; Schuderer, B. ; Schoepe, Wilfried


The translational motion of a microsphere (radius 100 μm) in liquid helium is investigated. The sphere is levitating inside a superconducting capacitor and oscillates about its equilibrium position. The velocity amplitude and the resonance frequency are measured as a function of driving force and temperature (0.35 K up to 2.2 K). By increasing the driving force we first find a linear regime ...


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