Observation of Plasma Rotation Driven by Static Nonaxisymmetric Magnetic Fields in a Tokamak
Journal Article
·
· Physical Review Letters
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States)
- Columbia University, 2960 Broadway, New York, New York 10027-1754 (United States)
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, New Jersey 08543-0451 (United States)
We present the first evidence for the existence of a neoclassical toroidal rotation driven in a direction counter to the plasma current by nonaxisymmetric, nonresonant magnetic fields. At high beta and with large injected neutral beam momentum, the nonresonant field torque slows down the plasma toward the neoclassical 'offset' rotation rate. With small injected neutral beam momentum, the toroidal rotation is accelerated toward the offset rotation, with resulting improvement in the global energy confinement time. The observed magnitude, direction, and radial profile of the offset rotation are consistent with neoclassical theory predictions [A. J. Cole et al., Phys. Rev. Lett. 99, 065001 (2007)].
- OSTI ID:
- 21179898
- Journal Information:
- Physical Review Letters, Vol. 101, Issue 19; Other Information: DOI: 10.1103/PhysRevLett.101.195005; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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