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

研究成果: Article査読

9 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)322-328
ページ数7
ジャーナルJournal of Low Temperature Physics
162
3-4
DOI
出版ステータスPublished - 2011 2

ASJC Scopus subject areas

  • 原子分子物理学および光学
  • 材料科学(全般)
  • 凝縮系物理学

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