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Nonlinear Excitation of Plasma Convection
Author(s) -
Spatschek K. H.,
Laedke E. W.,
Shukla P. K.,
Yu M. Y.
Publication year - 1981
Publication title -
beiträge aus der plasmaphysik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0005-8025
DOI - 10.1002/ctpp.19810210602
Subject(s) - coalescence (physics) , excitation , physics , convection , plasma , nonlinear system , parametric statistics , diffusion , coupling (piping) , mechanics , computational physics , classical mechanics , materials science , quantum mechanics , mathematics , statistics , astrobiology , metallurgy
Parametric excitations of electrostatic convective cells by drift waves as well as magnetostatic cells by Alfvén waves are considered. The growth rates are calculated for various limits of interest to plasma diffusion studies; our results agree with computer simulations. The problem of crossfield diffusion is also discussed. Finally, the coupling of magnetostatic modes with electrostatic modes is investigated and a variational principle for coalescence of magnetic islands is formulated.