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A robust method for measurement of fluctuation parallel wavenumber in laboratory plasmas

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Poli, F. M. (Francesca), Podestà, M. and Fasoli, A. (Ambrogio F.). (2009) A robust method for measurement of fluctuation parallel wavenumber in laboratory plasmas. Review of Scientific Instruments, Vol.80 (No.5). p. 3501. ISSN 0034-6748

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Official URL: http://dx.doi.org/10.1063/1.3125627

Abstract

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.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Plasma diagnostics -- Research, Plasma dynamics -- Research, Plasma instabilities -- Research, Plasma waves -- Research
Journal or Publication Title:	Review of Scientific Instruments
Publisher:	American Institute of Physics
ISSN:	0034-6748
Date:	1 May 2009
Volume:	Vol.80
Number:	No.5
Page Range:	p. 3501
Identification Number:	10.1063/1.3125627
Status:	Peer Reviewed
Access rights to Published version:	Open Access
Funder:	Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung [Swiss National Science Foundation] (SNSF)
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URI:	http://wrap.warwick.ac.uk/id/eprint/2180