Attenuation of Third Sound in Liquid Helium and the Stability of Multiply Quantized Persistent Circulations of a Thin Helium Film in the Landau Region.

Abstract

The attenuation coefficiency has been measured by generating a third sound in a He II film coating a cylinder and observing the decay of pulses which propagate in both directions around the axis of the cylinder. Observed attenuations can be divided into three regions. The stability of multiply quantized persistent circulations was investigated by measuring the relative velocity of two third-sound waves thermally generated from two parallel aluminum strips and detected by a superconductor strip midway between them. The author concludes that persistent currents with high quantum numbers are unstable in times of the order of that of the experiment, namely 1/60 sec. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1971
Accession Number
AD0735924

Entities

People

  • Taylor Gun-jin Wang

Organizations

  • University of California, Los Angeles

Tags

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Waves
  • Acoustics
  • Aluminum
  • Attenuation
  • Physical Properties
  • Quantum Numbers
  • Sound Waves
  • Superconductors
  • Waves

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Fluid Dynamics.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.

Technology Areas

  • Quantum Computing