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

By F. M. (Francesca) Poli, M. Podestà and A. (Ambrogio F.) Fasoli


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

Topics: QC
Publisher: American Institute of Physics
Year: 2009
OAI identifier: oai:wrap.warwick.ac.uk:2180

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