NMR study of the effect of flow on {sup 3}He-B

Journal Article · Fri Sep 01 04:00:00 EDT 1995 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1007/BF00751520· OSTI ID:183267

Kruppa, D; Brewer, D F; Hutchins, J; Waxman, D ^[1]

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1. Univ. of Sussex (United Kingdom)

The authors have used a plastic diaphragm to generate flow in superfluid {sup 3}He B, through a cylindrical geometry, whilst monitoring the transverse NMR frequency. It was found that the critical flow velocity needed to induce NMR frequency shifts was dependent on the magnetic field. The results are explained by a numerical calculation of the texture in the {sup 3}He B, under the influences of magnetic field, fluid flow and surface energy terms. Also presented are measurements of the B phase NMR longitudinal frequency, derived from the magnitude of the flow-induced change in the transverse frequency. A flow-induced texture transition, which caused a dramatic narrowing of the NMR lineshape, is described.

• Sponsoring Organization: USDOE
• OSTI ID: 183267
• Journal Information: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 5-6 Vol. 100; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CRITICAL FLOW
FLUID FLOW
HELIUM 3 B
MAGNETIC FIELDS
NMR SPECTRA
SURFACE ENERGY
TEXTURE