Technique for determining second-sound attenuation near the superfluid transition in /sup 4/He

Journal Article · Sat Jan 01 04:00:00 EST 1983 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1137226· OSTI ID:6639852

Crooks, M J; Robinson, B J

A procedure has been developed to measure the attenuation of second sound in liquid helium at temperatures near T/sub lambda/. The decay rate of a second-sound resonance in a high-Q cavity is determined, and data for more than one harmonic is obtained allowing the separation of the attenuation due to bulk fluid from losses at the cavity walls. This method has proven particularly successful near T/sub lambda/, where the second-sound velocity is strongly dependent on temperature and a high degree of temperature stability is needed. Results are given for the temperature range 40 ..mu..K

• Research Organization: Department of Physics, University of British Columbia, Vancouver, British Columbia V6T 2A6, Canada
• OSTI ID: 6639852
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 54:1; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATTENUATION
CAVITIES
DATA
ENERGY LOSSES
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
FLUIDS
HARMONICS
HELIUM 4
HELIUM II
HELIUM ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
LIQUIDS
LOSSES
NUCLEI
NUMERICAL DATA
OSCILLATIONS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
QUANTUM FLUIDS
RESONANCE
SATURATION
SECOND SOUND
STABILITY
STABLE ISOTOPES
SUPERFLUIDITY
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VAPOR PRESSURE
VELOCITY
WALLS