Alfvén wave dispersion behavior in single- and multicomponent plasmas

Rahbarnia, K.; Ullrich, S.; Sauer, K.; Grulke, O.; Klinger, T.
March 2010
Physics of Plasmas;Mar2010, Vol. 17 Issue 3, p032102
Academic Journal
Dispersion relations of driven Alfvén waves (AWs) are measured in single- and multicomponent plasmas consisting of mixtures of argon, helium, and oxygen in a magnetized linear cylindrical plasma device VINETA [C. Franck, O. Grulke, and T. Klinger, Phys. Plasmas 9, 3254 (2002)]. The decomposition of the measured three-dimensional magnetic field fluctuations and the corresponding parallel current pattern reveals that the wave field is a superposition of L- and R-wave components. The dispersion relation measurements agree well with calculations based on a multifluid Hall-magnetohydrodynamic model if the plasma resistivity is correctly taken into account.


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