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research article
A robust method for measurement of fluctuation parallel wavenumber in laboratory plasmas
Measuring the parallel wavenumber is fundamental for the experimental characterization of electrostatic instabilities. It becomes particularly important in toroidal geometry, where spatial inhomogeneities and curvature can excite both drift instabilities, whose wavenumber parallel to the magnetic field is finite, and interchange instabilities, which typically have vanishing parallel wavenumber. We demonstrate that multipoint measurements can provide a robust method for the discrimination between the two cases.
Type
research article
Web of Science ID
WOS:000266442500017
Authors
Publication date
2009
Publisher
Published in
Volume
80
Issue
5
Article Number
053501
Subjects
Peer reviewed
REVIEWED
Available on Infoscience
May 20, 2010
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