Abstract
Abstract We are working to realize a superfluid 'He analog of the superconducting rf SQUID to be used as a gyroscope. As a first step we developed an experimental method to induce an ac superfluw across a 5 μm radius orifice by using a rotation. The orifice was supported by a septum placed inside a hollow torus filled with liquid helium and the flow was induced by rotating the whole torus, that was the inertial member of a torsional oscillator. We report here measurements of the critical velocity for the orifice, obtained by detecting the occurrence of a dissipation in the oscillator's motion. The energy and the number of circulation quanta involved in the dissipative process are evaluated.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
