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

Journal Article · Mon Sep 10 00:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.65.1364· OSTI ID:6056239

Ida, K; Hidekuma, S ^[1]; Miura, Y; Fujita, T; Mori, M; Hoshino, K; Suzuki, N; Yamauchi, T; Group, J ^[2]

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1. National Institute for Fusion Science, Nagoya, 464-01 (Japan)
2. Japan Atomic Energy Research Institute, Naka-machi, Naka-gun, Ibaraki 319-11 (Japan)

The structure of the edge radial electric field {ital E}{sub {ital r}} inferred from the poloidal rotation velocity is compared with that of the particle and thermal transport barrier for {ital H}-mode plasmas in JFT-2M. Both {ital E}{sub {ital r}} and its gradient {partial derivative}{ital E}{sub {ital r}}/{partial derivative}{ital r} in the thermal transport barrier are found to become more negative at the {ital L}-{ital H} transition. On the other hand, {partial derivative}{ital E}{sub {ital r}}/{partial derivative}{ital r} is more positive outside of the separatrix. The shear of the radial electric field and poloidal rotation velocity in the {ital H} mode is localized within the order of an ion poloidal gyroradius near the separatrix, in the region of ion collisionality {nu}{sub *{ital i}}{approx}20--40.

• OSTI ID: 6056239
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 65:11; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
CLOSED PLASMA DEVICES
DATA
ELECTRIC FIELDS
ELECTRON TEMPERATURE
EXPERIMENTAL DATA
INFORMATION
JFT-2M TOKAMAK
MOTION
NUMERICAL DATA
PLASMA
PLASMA DIAGNOSTICS
PLASMA RADIAL PROFILES
ROTATION
SHEAR
TEMPERATURE GRADIENTS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
VELOCITY