Accession Number : ADA320580

Title :   Josephson Sound in Superfluid Helium.

Descriptive Note : Final technical rept. 1 Oct 93-30 Sep 96,

Corporate Author : CALIFORNIA UNIV BERKELEY DEPT OF PHYSICS

Personal Author(s) : Packard, Richard

PDF Url : ADA320580

Report Date : 12 DEC 1996

Pagination or Media Count : 5

Abstract : The research has been directed toward understanding the physics of superfluid phase slippage. The central goal is to observe and quantify acoustic fields radiated from the phase slip microaperatures. The sound field contains information about the stochastic processes driving phase slippage. The velocity dependent energy barrier for these processes has been determined. Understanding the acoustic pulses associated with phase slips has led to a demonstration of a superfluid Helium rotation sensor.

Descriptors :   *SUPERFLUIDITY, STOCHASTIC PROCESSES, ACOUSTIC SIGNALS, LIQUID HELIUM.

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE