Home » Cross-Magnetic Turbulent Diffusion of Charged Particles in a Weakly Ionized Plasma (Forschungsberichte des Landes Nordrhein-Westfalen / Fachgruppe Textilforschung) by Michio Matsumoto
Cross-Magnetic Turbulent Diffusion of Charged Particles in a Weakly Ionized Plasma (Forschungsberichte des Landes Nordrhein-Westfalen / Fachgruppe Textilforschung) Michio Matsumoto

Cross-Magnetic Turbulent Diffusion of Charged Particles in a Weakly Ionized Plasma (Forschungsberichte des Landes Nordrhein-Westfalen / Fachgruppe Textilforschung)

Michio Matsumoto

Published December 6th 2012
ISBN :
Kindle Edition
34 pages
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 About the Book 

It is very important to know how field fluctuations affect the diffusion of plasma across a strong magnetic field B. Many investigators have studied this problem theoretically1)-8) and expertmentally. 9)~12) In cases of weak turbulence, the ionMoreIt is very important to know how field fluctuations affect the diffusion of plasma across a strong magnetic field B. Many investigators have studied this problem theoretically1)-8) and expertmentally. 9)~12) In cases of weak turbulence, the ion diffusion coefficient Dl is proportional to the electric field fluctuation energy or the mean square amplitude of density fluctua­ tions. 1) For a higher degree of fluctuation amplitudes exceeding a certain 2 7 threshold which is given by the relation1/2 e he/Te = 1t P Dupree ) T proposed D~ rJ. 1/2. Here, e = lei is the electronic char-e, he the electron Debye length, Te the electron teriip:rature in unit of energy, PTe the electron mean Larmor radius and }1. = no on%x, no (r) being the mean density of charged particles. Duprees theory, however, is applicable 12 only to the ion diffusion in a c ollisionless plasma. Walsh et a1 ) determined from measurements in the Q-machine the diffusion coefficient as a function of the mean square amplitude of density fluctuations. Their experimental results are in good agreement with the predictions of Duprees theory. 2 The turbulent diffusion in the positive column was first studied by Kadomtsev.