Effects of orbit squeezing on ion transport, poloidal mass flow and bootstrap current in the limit of very low collisionality

Michel Dirickx, B. Weyssow

Research output: Contribution to journalArticlepeer-review

Abstract

In the edge region of a tokamak, especially during H-mode operation, the values of the radial electric field Er and of its radial derivative dEr/dr are larger than those allowed by the standard neoclassical theory. In this paper we focus our attention to the region where dEr/dr is negative and very large. This gives rise to orbit squeezing and requires a new approach to solve the drift kinetic equation (DKE). In this paper we re-examine the method of the linearized DKE developed by Shaing and Hazeltine and the `global' method due to Hinton and Kim, and we ameliorate the latter by consistently taking the temperature gradient into account.

Original languageEnglish
Pages (from-to)711-729
Number of pages19
JournalPlasma Physics and Controlled Fusion
Volume42
Issue number6
DOIs
Publication statusPublished - Jun 2000

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