Internal Electric Field Structure of Launched Fast Magnetosonic Waves in the DIII-D Tokamak

Journal Article · Sun Mar 01 04:00:00 EST 1998 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.80.2330· OSTI ID:597218

Lee, J H; Peebles, W A; Doyle, E J; Rhodes, T L ^[1]; Lee, J H ^[2]; Jaeger, E F ^[3]; Luhmann, Jr, N C ^[4]; Petty, C C; Pinsker, R I; Prater, R ^[5]

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1. Department of Electrical Engineering and Institute of Plasma and Fusion Research, University of California, Los Angeles, California 90095 (United States)
2. School of Electronic and Electrical Engineering, Hong-Ik University, Seoul 121-791 (Korea)
3. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
4. Department of Applied Science, University of California, Davis, California 95616 (United States)
5. General Atomics, P.O. Box 85608, San Diego, California 92186 (United States)

Results are obtained, for the first time in a major tokamak plasma, of the spatial electric field structure of a launched fast magnetosonic wave (FW). The FW launch directionality necessary for current drive has been confirmed at a position close to the FW antenna. The FW electric field profile is determined using X-mode reflectometry. Electric field profiles, calculated using a full-wave numerical code, exhibit many features common to the experimental results. However, differences remain regarding density dependence that suggest alternative damping mechanisms may exist. {copyright} {ital 1998} {ital The American Physical Society}

• Research Organization: General Atomics
• DOE Contract Number: AC03-89ER51114; AC05-84OR21400; FG03-86ER53225
• OSTI ID: 597218
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 11 Vol. 80; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CURRENT-DRIVE HEATING
DENSITY
ELECTRIC FIELDS
LANDAU DAMPING
MAGNETOACOUSTIC WAVES
REFLECTION
TOKAMAK DEVICES