Two-dimensional structure and particle pinch in tokamak H mode

Naohiro Kasuya, Kimitaka Itoh

研究成果: ジャーナルへの寄稿学術誌査読

15 被引用数 (Scopus)

抄録

Two-dimensional structures of the electrostatic potential, density, and flow velocity near the edge of a tokamak plasma are investigated. The model includes the nonlinearity in bulk-ion viscosity and turbulence-driven shear viscosity. For the case with the strong radial electric field (H mode), a two-dimensional structure in a transport barrier is obtained, giving a poloidal shock with a solitary radial electric field profile. The inward particle pinch is induced from this poloidal asymmetric electric field, and increases as the radial electric field becomes stronger. The abrupt increase of this inward ion and electron flux at the onset of L- to H-mode transition explains the rapid establishment of the density pedestal, which is responsible for the observed spontaneous self-reorganization into an improved confinement regime.

本文言語英語
論文番号195002
ジャーナルPhysical review letters
94
19
DOI
出版ステータス出版済み - 5月 20 2005
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)

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