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Ions and electrons in liquid helium$
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Armando Francesco Borghesani

Print publication date: 2007

Print ISBN-13: 9780199213603

Published to Oxford Scholarship Online: January 2008

DOI: 10.1093/acprof:oso/9780199213603.001.0001

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MOTION OF IONS ALONG LINEAR VORTICES

MOTION OF IONS ALONG LINEAR VORTICES

Chapter:
(p.205) 12 MOTION OF IONS ALONG LINEAR VORTICES
Source:
Ions and electrons in liquid helium
Author(s):

A.F. Borghesani

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199213603.003.0012

Ions and electron bubbles are captured by the vortex lines which occur in a rotating superfluid sample. Once captured, however, the charges can move along the quantized vortex lines. On one hand, this degree of freedom allows the researcher to use ions to detect the appearance of single, quantized vortex lines. On the other hand, the study of the ion motion along the lines gives important pieces of information on the structure and dynamics of vortices. In fact, the ion motion along the lines is limited by scattering on 3He impurities captured by the vorticity field and by vortex waves, i.e., columnar oscillation of the vortex lines. Experiments and theory of vortex wave-, roton, and 3He impurity scattering on vortex lines are described.

Keywords:   vortex lines, vortex waves, localized rotons, vortex wave emission, absorbed 3He impurities

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