caa a22 4500 445365617 CHVBK 20180317142929.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s10909-010-0277-1 doi (NATIONALLICENCE)springer-10.1007/s10909-010-0277-1 Time-of-Flight Experiments of Vortex Rings Propagating from Turbulent Region of Superfluid 4He at High Temperature [Elektronische Daten] [Y. Nago, T. Ogawa, K. Obara, H. Yano, O. Ishikawa, T. Hata] We report the time-of-flight of quantized vortex rings generated by a vibrating wire in superfluid 4He which contains normal fluid component. A cover box of vibrating wires and slow cooling of superfluid reduce the number of vortices attached to wire surfaces, enabling us to study vortex rings propagating from a turbulent region. Using two vibrating wires as a generator and a detector of vortices, the time-of-flight of vortices propagating a distance of 0.88 mm was measured at 1.25K. We find that the time-of-flights distribute from 0.06 s to 27.4s, much larger than the lifetimes of circular vortex rings limited in the size of a generator amplitude. These results imply that large vortex rings with non-circular shape or vortex tangles are created by the generator, propagating slowly and colliding with the detector before complete disappearance. Springer Science+Business Media, LLC, 2010 Quantized vortex nationallicence Quantum turbulence nationallicence Oscillatory flow nationallicence Superfluid helium nationallicence Nago Y. Graduate School of Science, Osaka City University, 558-8585, Osaka, Japan aut Ogawa T. Graduate School of Science, Osaka City University, 558-8585, Osaka, Japan aut Obara K. Graduate School of Science, Osaka City University, 558-8585, Osaka, Japan aut Yano H. Graduate School of Science, Osaka City University, 558-8585, Osaka, Japan aut Ishikawa O. Graduate School of Science, Osaka City University, 558-8585, Osaka, Japan aut Hata T. Graduate School of Science, Osaka City University, 558-8585, Osaka, Japan aut Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/3-4(2011-02-01), 322-328 0022-2291 162:3-4<322 2011 162 10909 https://doi.org/10.1007/s10909-010-0277-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10909-010-0277-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nago Y. Graduate School of Science, Osaka City University, 558-8585, Osaka, Japan aut NATIONALLICENCE 700 1- Ogawa T. Graduate School of Science, Osaka City University, 558-8585, Osaka, Japan aut NATIONALLICENCE 700 1- Obara K. Graduate School of Science, Osaka City University, 558-8585, Osaka, Japan aut NATIONALLICENCE 700 1- Yano H. Graduate School of Science, Osaka City University, 558-8585, Osaka, Japan aut NATIONALLICENCE 700 1- Ishikawa O. Graduate School of Science, Osaka City University, 558-8585, Osaka, Japan aut NATIONALLICENCE 700 1- Hata T. Graduate School of Science, Osaka City University, 558-8585, Osaka, Japan aut NATIONALLICENCE 773 0- Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/3-4(2011-02-01), 322-328 0022-2291 162:3-4<322 2011 162 10909 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer