Experiments in liquid sup 3 He at low temperatures

Miscellaneous · Sun Jan 01 00:00:00 EST 1989

OSTI ID:5044492

Heff, A

This dissertation describes three projects. The first is a re-analysis of the magnetic field dependence of the longitudinal nuclear magnetic resonance in superfluid {sup 3}He B. These measurements were previously reported in the thesis of D. S. Sherrill (1987). The f wave coupling of the {sup 3}He B order parameter is fit to the data of Sherrill by the quasiclassical theory. The second project is the design and construction of an experimental cell to measure properties of superfluid {sup 3}He A with a vibrating wire viscometer. The vibrating wire is used as a thermometer to measure the specific heat of the A phase and the Kapitza resistance of the {sup 3}He A to {sup 3}He B interface. The A phase is expected to have a T{sup 3} temperature dependence and the Kapitza resistance is expected to have an exponential temperature dependence. The damping of the wire in the A phase will also be observed to study the properties of the A phase quasiparticles and textures. The damping is expected to have a T{sup 2} temperature dependence. The last project deals with several aspects of spin waves in {sup 3}He. First is a theory predicting the quasiparticle transmission coefficient between saturated {sup 3}He - {sup 4}He mixtures and pure normal or superfluid {sup 3}He. The transmission coefficient determines the spin wave spectrum of a phase separated {sup 3}He - {sup 4}He mixture. An experiment to measure the spin wave spectrum has been constructed in the same experimental cell as the vibrating wire experiment. Because of simplifications in the boundary conditions, this setup will also be used to improve previous measurements of spin waves in a single phase of {sup 3}He.

• Research Organization: The Ohio State Univ., Columbus, OH (United States)
• OSTI ID: 5044492
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HELIUM 3
SUPERFLUIDITY
HELIUM 3 A
KAPITZA RESISTANCE
SPECIFIC HEAT
HELIUM 3 B
NUCLEAR MAGNETIC RESONANCE
HELIUM II
SPIN WAVES
CONSTRUCTION
DAMPING
DESIGN
EXPERIMENTAL DATA
MAGNETIC FIELDS
MEASURING INSTRUMENTS
TEMPERATURE DEPENDENCE
DATA
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FLUIDS
HELIUM 4
HELIUM ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
NUCLEI
NUMERICAL DATA
PHYSICAL PROPERTIES
QUANTUM FLUIDS
RESONANCE
STABLE ISOTOPES
THERMAL BOUNDARY RESISTANCE
THERMODYNAMIC PROPERTIES
640450* - Fluid Physics- Superfluidity