Microturbulence reduction during counter neutral beam injection in the DIII-D tokamak
- Department of Electrical Engineering and Institute of Plasma and Fusion Research, University of California, Los Angeles, California 90024 (United States)
- General Atomics, P. O. Box 85608, San Diego, California 92186 (United States)
When significant neutral beam power is injected in the direction counter to the plasma current in the DIII-D tokamak [{ital Plasma} {ital Physics} {ital and} {ital Controlled} {ital Nuclear} {ital Fusion} {ital Research} 1986 (International Atomic Energy Agency, Vienna, 1987), Vol. 1, p. 159], a prompt reduction in electrostatic turbulence is observed, principally in shorter wavelength modes. The core radial electric field reverses polarity and becomes sheared as the fluctuations reduce. As the electric field continues evolving, a larger reduction is observed on a slower time scale. These observations support the possibility of controlling turbulence and its associated transport by controlling the internal radial electric field. {copyright} {ital 1996 American Institute of Physics.}
- OSTI ID:
- 285399
- Journal Information:
- Physics of Plasmas, Vol. 3, Issue 6; Other Information: PBD: Jun 1996
- Country of Publication:
- United States
- Language:
- English
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