Generation and detection of vortex rings in superfluid 4He at very low temperature

H. Yano, A. Nishijima, S. Yamamoto, T. Ogawa, Y. Nago, K. Obara, O. Ishikawa, M. Tsubota, T. Hata

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

Motions of vortices are fundamental characteristics of quantum turbulence. These motions are expected to be governed only by quantized circulations in superfluids at the zero temperature limit. In the present paper, we report the motions of vortex rings emitted from a quantum turbulence in superfluid 4He, by detecting vortex rings using a vortex-free vibrating wire as a detector. The time of flights of vortex rings are distributed, because vortex rings are emitted in any direction from a turbulent region and the detector can respond only to a reachable vortex ring. By measuring time-of-flights many times, we find an exponential distribution of time-of-flights with a non-detection period, which corresponds to the fastest time of flights of vortex rings. For a larger generation power of vortex rings, a distribution of time-of-flights still shows a single exponential distribution, but a non-detection period becomes shorter. This result implies that sizes of emitted vortex rings are distributed dependently on the generation power of turbulence. The observed exponential distributions are confirmed by numerical simulations of the dynamics of vortex rings.

Original languageEnglish
Article number012085
JournalJournal of Physics: Conference Series
Volume400
Issue numberPART 1
DOIs
Publication statusPublished - 2012 Jan 1
Event26th International Conference on Low Temperature Physics, LT 2011 - Beijing, China
Duration: 2011 Aug 102011 Aug 17

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Generation and detection of vortex rings in superfluid <sup>4</sup>He at very low temperature'. Together they form a unique fingerprint.

  • Cite this

    Yano, H., Nishijima, A., Yamamoto, S., Ogawa, T., Nago, Y., Obara, K., Ishikawa, O., Tsubota, M., & Hata, T. (2012). Generation and detection of vortex rings in superfluid 4He at very low temperature. Journal of Physics: Conference Series, 400(PART 1), [012085]. https://doi.org/10.1088/1742-6596/400/1/012085