Excitation of Toroidicity-Induced Alfven Eigenmodes by the Electrodes Inserted in a Heliotron/Torsatron Plasma

Journal Article · Fri Jun 10 00:00:00 EDT 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.94.225005· OSTI ID:20696362

Matsunaga, G; Kawada, S; Kotani, J ^[1]; Toi, K; Suzuki, C; Matsuoka, K ^[2]

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1. Department of Energy and Engineering Science, Nagoya University, Nagoya 464-8601 (Japan)
2. National Institute for Fusion Science, Toki 509-5292 (Japan)

A novel method of exciting shear Alfven waves using electrodes inserted in a plasma was developed for basic study of Alfven eigenmodes in a heliotron/torsatron plasma. The electrodes can induce excitation current along the confinement field line, and generate magnetic perturbations perpendicular to the confinement field. By sweeping the frequency of the current in a cold plasma, the toroidicity-induced Alfven eigenmode was resonantly excited at the predicted frequency and radial location. Plasma response to the applied magnetic perturbations indicates a fairly large damping rate caused by continuum damping.0.

• OSTI ID: 20696362
• Journal Information: Physical Review Letters, Vol. 94, Issue 22; Other Information: DOI: 10.1103/PhysRevLett.94.225005; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
COLD PLASMA
ELECTRODES
EXCITATION
HELIOTRON
PLASMA CONFINEMENT
TORSATRON STELLARATORS