Time-of-flight experiments of vortex rings propagating from turbulent region of superfluid 4He at high temperature

Y. Nago, T. Ogawa, K. Obara, H. Yano, O. Ishikawa, T. Hata

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

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 1.25 K. We find that the time-of-flights distribute from 0.06 s to 27.4 s, 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.

Original languageEnglish
Pages (from-to)322-328
Number of pages7
JournalJournal of Low Temperature Physics
Volume162
Issue number3-4
DOIs
Publication statusPublished - 2011 Feb 1

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Keywords

  • Oscillatory flow
  • Quantized vortex
  • Quantum turbulence
  • Superfluid helium

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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