Effects of orbit squeezing on poloidal mass flow and bootstrap current in tokamak plasmas

Ker-Chung Shaing, C. T. Hsu, R. D. Hazeltine

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

It is shown, by solving the drift kinetic equation, that the asymptotic values of the poloidal mass flow and the bootstrap current in the banana regime of large-aspect-ratio tokamak plasmas are not affected by orbit squeezing. However, because the definition of ion collisionality v*i is reduced by a factor S-3/2, with S=1-(ρpid lnE r/dr) (cEr/Bpvti), the values of both the poloidal mass flow and the bootstrap current at the banana-plateau transition are different from those of the conventional neoclassical theory. Here, ρpi is the ion poloidal gyroradius, Er is the radial electric field, c is the speed of light, Bp is the poloidal magnetic strength, vti is the ion thermal speed, and r is the local radius. The implications for the experimental observations of poloidal rotation speeds in high mode (H mode) are discussed.

Original languageEnglish
Pages (from-to)3365-3368
Number of pages4
JournalPhysics of Plasmas
Volume1
Issue number10
DOIs
Publication statusPublished - 1994 Jan 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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