Turbulent resistivity in hydrogen and noble-gas plasmas

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The resistivity of a plasma that has become turbulent under the influence of a high electric field is measured. The relations of the resistivity in the initial stage of turbulence with the parameters of the plasma are considered. The electric field along the plasma column extends from 10 up to 45 kV m-1. Plasma densities are varied between 1019and 1.5×1020m-3in H, He, Ne, Ar, and Xe. The plasma is confined in a magnetic mirror field of 0.4-1.5 T peak induction. A linear dependence is found between the resistivity and the applied electric field. The confining magnetic field has a negligible influence. At low densities (1-3×1019m-3) the resistivity is independent of the ion mass. At higher densities a mass dependence is found. The correlation between the resistivity and the level of electrostatic fluctuations, measured by means of microwave radiation emitted by the plasma, indicates a linear relation between the effective collision frequency and the fluctuation energy. From the agreement with the computer simulations of Biskamp and Chodura it is concluded that the saturation of the instabilities is caused by ion trapping. Nonlinear Landau damping is shown to be unimportant under the prevailing conditions. © 1973.




Schrijver, H. (1973). Turbulent resistivity in hydrogen and noble-gas plasmas. Physica, 70(2), 358–374. https://doi.org/10.1016/0031-8914(73)90254-1

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