Radial Electric Field Measurements in Reversed Shear Plasmas

Journal Article · Mon Jun 01 00:00:00 EDT 1998 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.80.4887· OSTI ID:634234

Levinton, F M ^[1]; Bell, R E; Synakowski, E J; Zarnstorff, M C ^[2]; Batha, S H ^[3]

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1. Fusion Physics and Technology, Torrance, California 90503 (United States)
2. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
3. Science Research Laboratory, Somerville, Massachusetts 02143 (United States)

Measurements of the radial electric field have been obtained on the Tokamak Fusion Test Reactor utilizing the motional Stark effect diagnostic. A large negative excursion in the radial electric field occurs before the transition to the enhanced reversed magnetic shear mode. The electric field is localized to a narrow spatial region and is not observed in discharges without the transition to improved confinement. Concomitant with the radial electric field excursion is a change in the measured impurity poloidal rotation velocity and bursts of magnetic fluctuations. {copyright} {ital 1998} {ital The American Physical Society}

• Research Organization: Princeton Plasma Physics Laboratory
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 634234
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 22 Vol. 80; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRIC FIELDS
EXCURSIONS
FIELD-REVERSED THETA PINCH DEVICES
FLUCTUATIONS
MAGNETIC FIELDS
PLASMA CONFINEMENT
PLASMA DIAGNOSTICS
ROTATION
SHEAR PROPERTIES
STARK EFFECT
TFTR TOKAMAK