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.


Published in:
Review of Scientific Instruments, 80, 5, 053501
Year:
2009
Publisher:
American Institute of Physics
ISSN:
0034-6748
Keywords:
Laboratories:
SPC
CRPP




 Record created 2010-05-20, last modified 2018-01-28


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