Fast Ion Effects on Fishbones and n=1 Kinks in JET Simulated by a Non-perturbative NOVA-KN Code [electronic resource].
- Washington, D.C. : United States. Dept. of Energy. Office of Science, 2004. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
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- 2.7 MB pages : digital, PDF file
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- United States. Department of Energy. Office of Science and United States. Department of Energy. Office of Scientific and Technical Information
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- Free-to-read Unrestricted online access
- New global non-perturbative hybrid code, NOVA-KN, and simulations of resonant type modes in JET [Joint European Torus] plasmas driven by energetic H-minority ions are presented. The NOVA-KN code employs the ideal-MHD description for the background plasma and treats non-perturbatively the fast particle kinetic response, which includes the fast ion finite orbit width (FOW) effect. In particular, the n = 1 fishbone mode, which is in precession drift resonance with fast ions, is studied. The NOVA-KN code is applied to model an n = 1 (f = 50-80kHz) MHD activity observed recently in JET low density plasma discharges with high fast ion (H-minority) energy content generated during the ion cyclotron resonance heating (ICRH). This n = 1 MHD activity is interpreted as the instability of the n = 1 precession drift frequency fishbone modes.
- Published through SciTech Connect., 10/28/2004., "pppl-4021", C.Z. Cheng; N.N. Gorelenkov; S.E. Sharapov; M.J. Mantsinen; V.G. Kiptily; the JET-EFDA Contributors., and Princeton Plasma Physics Lab., Princeton, NJ (US)
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