### 摘要

The moment equation approach to neoclassical processes is used to derive the linearized electrostatic perturbed flows, currents, and resistive MHD-like equations for a tokamak plasma. The new features of the resultant "neoclassical magnetohydrodynamics," which requires a multiple length scale analysis for the parallel eigenfunction, but is valid in the experimentally relevant banana-plateau regime of collisionality, are: (1) a global Ohm's law that includes a fluctuating bootstrap current resulting from the "parallel" electron viscous damping (at rate μ_{e}) of the poloidal flow due to the perturbed radial pressure gradient; (2) reduction of the curvature effects to their flux surface average because Pfirsch-Schlüter currents cancel out the lowest-order geodesic curvature effects: (3) an increased polarization drift contribution with B^{-2}, replaced by B_{⊖}^{-2}, where B_{⊖} is the poloidal magnetic field component. An electrostatic eigenmode equation is determined from ▽·J̃=0. For the unstable fluid-like eigenmodes, the new viscous damping effects dominate (by ε^{-3/2}) over the curvature effects, but the growth rates still scale roughly like resistive-g or resistive-ballooning modes, γ_{μ}τ_{Α}∼ n^{2/3}S_{N}^{1/3}β_{T}^{2/3}(μ _{e}/ν_{e})^{1/3}. Diamagnetic drift frequency corrections to these new modes are also discussed.

原文 | English |
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頁（從 - 到） | 1845-1858 |

頁數 | 14 |

期刊 | Physics of Fluids |

卷 | 28 |

發行號 | 6 |

DOIs | |

出版狀態 | Published - 1985 一月 1 |

### All Science Journal Classification (ASJC) codes

- Computational Mechanics
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Fluid Flow and Transfer Processes