### 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-(ρ_{pi}d lnE _{r}/dr) (cE_{r}/B_{p}v_{ti}), 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, ρ_{pi} is the ion poloidal gyroradius, E_{r} is the radial electric field, c is the speed of light, B_{p} is the poloidal magnetic strength, v_{ti} 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 language | English |
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Pages (from-to) | 3365-3368 |

Number of pages | 4 |

Journal | Physics of Plasmas |

Volume | 1 |

Issue number | 10 |

DOIs | |

Publication status | Published - 1994 Jan 1 |

### All Science Journal Classification (ASJC) codes

- Condensed Matter Physics

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## Cite this

*Physics of Plasmas*,

*1*(10), 3365-3368. https://doi.org/10.1063/1.870484