Edge electric-field profiles of H-mode plasmas in the JFT-2M tokamak | Zendy

K. Ida | Zendy; S. Hidekuma | Zendy

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Edge electric-field profiles of H-mode plasmas in the JFT-2M tokamak

Author(s) -

K. Ida,

S. Hidekuma

Publication year - 1990

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.65.1364

Subject(s) - physics , tokamak , collisionality , gyroradius , electric field , atomic physics , plasma , ion , condensed matter physics , nuclear physics , quantum mechanics

The structure of the edge radial electric field E_r inferred from the poloidal rotation velocity is compared with that of the particle and thermal transport barrier for H-mode plasmas in JFT-2M. Both E_r and its gradient ∂E_r/∂r in the thermal transport barrier are found to become more negative at the L-H transition. On the other hand, ∂E_r/∂r is more positive outside of the separatrix. The shear of the radial electric field and poloidal rotation velocity in the H mode is localized within the order of an ion poloidal gyroradius near the separatrix, in the region of ion collisionality nu ast_rapprox 20-4

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