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When is quasi-linear theory exactWe use the cumulant expansion technique of Kubo (1962, 1963) to derive an integrodifferential equation for the average one-particle distribution function for particles being accelerated by electric and magnetic fluctuations of a general nature. For a very restricted class of fluctuations, the equation for this function degenerates exactly to a differential equation of Fokker-Planck type. Quasi-linear theory, including the adiabatic assumption, is an exact theory only for this limited class of fluctuations.
Document ID
19750031570
Document Type
Reprint (Version printed in journal)
Authors
Jones, F. C.
Birmingham, T. J. (NASA Goddard Space Flight Center Theoretical Studies Group, Greenbelt, Md., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1975
Publication Information
Publication: Plasma Physics
Volume: 17
Subject Category
PLASMA PHYSICS
Distribution Limits
Public
Copyright
Other