Journal of Low Temperature Physics

, Volume 55, Issue 5–6, pp 495–526 | Cite as

Vibrating superleak second-sound transducers. Theory and experiment

  • N. Giordano
Article

Abstract

The properties of vibrating superleak second-sound transducers of the type invented by Rudnick and co-workers and Sherlock and Edwards are discussed. Recent theoretical treatments of these transducers are reviewed, and an error in Saslow's theory of the detection process is corrected. The theory is then extended so as to take into account Poiseuille flow of the normal fluid through the superleak. We also describe experiments in which the transducers are used to excite and detect second sound in a resonant cavity containing superfluid4He. Our results indicate that the flow of the normal fluid component through the superleak is very important under the conditions commonly found in experiments involving these transducers. The experimental results are in good general agreement with the theory.

Keywords

Magnetic Material Detection Process Theoretical Treatment Poiseuille Flow Resonant Cavity 

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Copyright information

© Plenum Publishing Corporation 1984

Authors and Affiliations

  • N. Giordano
    • 1
  1. 1.Department of PhysicsPurdue UniversityWest Lafayette

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