Abstract
The toroidal ion temperature gradient electrostatic drift waves are investigated including the effect of ion dynamics parallel to the ambient magnetic fields. By using the transport equations of Braginskii, the mode equations are derived. The local as well as nonlocal dispersion relations are obtained and various limiting cases are discussed. Also addressed is the issue of the anomalous ion energy transport that is caused by the nonthermal ion temperature gradient drift waves. A possible stationary solution of the nonlinear mode coupling equations is presented. The relevance of our investigation to the ion energy confinement in tokamaks is pointed out.
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