Open AccessON THE LOW FREQUENCY DRIFT WAVE AND THE PSEUDOCLASSICAL DIFFUSION
Author(s) -
Zhang Cheng-Fu
Publication year - 1980
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.29.214
Subject(s) - physics , diffusion , dissipative system , anomalous diffusion , tokamak , stochastic drift , collision frequency , range (aeronautics) , plasma diffusion , relaxation (psychology) , low frequency , quantum electrodynamics , plasma , quantum mechanics , mathematics , materials science , psychology , social psychology , knowledge management , statistics , innovation diffusion , computer science , composite material , astronomy
In this paper, the relationship between the low frequency drift wave and the empirical law of anomalous transport in Tokamak the pseudo-classical diffusion is discussed. We show that, it is the collisionless drift wave, rather than the dissipative one, which corresponds to the pseudoelassical diffusion. If the linear unstable collision-less drift wave is saturated mainly by the quasi-linear relaxation process, it can lead to a diffusion of the pseudo-classical type. The estimated diffusion coefficient agrees with experiment within an order of magnitude. The range of the parameters in which the above mentioned mechanism may be effective is discussed.