A waveguide partially packed with superleak as a probe of superfluid properties

Joseph Rudnick*, Isadore Rudnick, Ralph Rosenbaum

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A waveguide partially packed with superleak and filled with superfluid4He is proposed as a useful configuration for studying acoustic modes. A calculation is performed indicating that the low-frequency propagating modes in such a system are of two types: a combined first/fourth sound mode and a modified second sound type mode. Experimentally, the waveguide is closed back on itself to form a toroidal resonator. Resonant frequencies were measured, and the experimental results compared favorably with the calculations. However, there remain unresolved discrepancies. This resonator may prove useful in measuring the possible superfluid properties of the new state of3He.

Original languageEnglish
Pages (from-to)417-429
Number of pages13
JournalJournal of Low Temperature Physics
Volume16
Issue number5-6
DOIs
StatePublished - Sep 1974
Externally publishedYes

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