High internal inductance improved confinement [ital H]-mode discharges obtained with an elongation ramp technique in the DIII-D tokamak

Journal Article · Mon May 31 04:00:00 EDT 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.70.3435· OSTI ID:6459927

Lao, L L; Ferron, J R; Taylor, T S; Burrell, K H; Chan, V S; Chu, M S; DeBoo, J C; Doyle, E J; Greenfield, C M; Groebner, R J; James, R; Lazarus, E A; Osborne, T H; John, H; Strait, E J; Thompson, S J; Turnbull, A D; Wroblewski, D; Zohm, H

High confinement mode ([ital H]-mode) discharges with peaked toroidal current density profile (high internal inductance, [ital l][sub [ital i]]) and improved confinement are obtained in the DIII-D tokamak by dynamically varying the current profile using a rapid elongation ramp technique. The confinement improvement increases with [ital l][sub [ital i]] and persists in the presence of edge-localized modes. The plasma toroidal rotation and the corresponding radial electric field component also increase with the peakedness of the current density profile.

• DOE Contract Number: AC03-89ER51114
• OSTI ID: 6459927
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 70:22; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700310* -- Plasma Confinement-- (1992-)
ANNULAR SPACE
CLOSED CONFIGURATIONS
CLOSED PLASMA DEVICES
CONFIGURATION
CONFINEMENT
CURRENT DENSITY
DATA
ENERGY
EXPERIMENTAL DATA
H-MODE PLASMA CONFINEMENT
HEAT
INFORMATION
MAGNETIC FIELD CONFIGURATIONS
MODIFICATIONS
NUMERICAL DATA
PLASMA CONFINEMENT
SPACE
THERMONUCLEAR DEVICES
TIME DEPENDENCE
TOKAMAK DEVICES
TOROIDAL CONFIGURATION
VARIATIONS