Measurements of Vortex Line Density Generated by a Quartz Tuning Fork in Superfluid \(^{4}\)

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• 作者：M. J. Jackson ; O. Kolosov ; D. Schmoranzer ; L. Skrbek…
• 关键词：Quantum turbulence ; Superfluid helium ; 4 ; Tuning fork ; Second sound
• 刊名：Journal of Low Temperature Physics
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：183
• 期：3-4
• 页码：208-214
• 全文大小：946 KB
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• 作者单位：M. J. Jackson (1)
  O. Kolosov (2)
  D. Schmoranzer (1)
  L. Skrbek (1)
  V. Tsepelin (2)
  A. J. Woods (2)
  
  1. Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 3, 121 16, Prague 2, Czech Republic
  2. Department of Physics, Lancaster University, Lancaster, LA1 4YB, UK
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Condensed Matter
  Characterization and Evaluation Materials
  Magnetism and Magnetic Materials
  
• 出版者：Springer Netherlands
• ISSN：1573-7357

文摘

We present proof-of-concept measurements of the vortex line density generated by a quartz tuning fork resonator probed by the attenuation of second sound in superfluid \(^4\)He at 1.6 K. The force–velocity response of a quartz tuning fork operating at a frequency of 31 kHz exhibited the onset of extra damping at a velocity of 0.5 ms\(^{-1}\). Attenuation of the 5th resonant mode of second sound was observed at the same velocity, indicating the production of vortex lines. Our measurements demonstrate that an increase of the drag coefficient corresponds to the development of quantum turbulence.