Noncircular Triangularity and Ellipticity-Induced Alfvén Eigenmodes Observed in JT-60U
- 23 March 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 80 (12), 2594-2597
- https://doi.org/10.1103/physrevlett.80.2594
Abstract
For the first time noncircular triangularity induced Alfvén eigenmodes (NAE) were observed in combined ion cyclotron resonance frequency and neutral beam injection heated plasmas. Ellipticity induced Alfvén eigenmodes (EAE) and toroidicity-induced Alfvén eigenmodes (TAE) were also observed in those plasmas. The threshold beta of the energetic ions for exciting the NAE modes was found to be similar to that for exciting TAE modes.Keywords
This publication has 21 references indexed in Scilit:
- Investigation of high-n TAE modes excited by minority-ion cyclotron heating in JT-60UPlasma Physics and Controlled Fusion, 1995
- Neutral beam driven global Alfvén eigenmodes in the Wendelstein W7-AS stellaratorPhysical Review Letters, 1994
- Stability of neutral beam driven TAE modes in DIII-DNuclear Fusion, 1993
- Excitation of high-n toroidicity-induced shear Alfvén eigenmodes by energetic particles and fusion alpha particles in tokamaksPhysics of Fluids B: Plasma Physics, 1992
- On resonant destabilization of toroidal Alfvén eigenmodes by circulating and trapped energetic ions/alpha particles in tokamaksPhysics of Fluids B: Plasma Physics, 1992
- Investigation of global Alfvén instabilities in the Tokamak Fusion Test ReactorPhysics of Fluids B: Plasma Physics, 1992
- Stability of Alfvén gap modes in burning plasmasPhysics of Fluids B: Plasma Physics, 1992
- Excitation of the toroidicity-induced shear Alfvén eigenmode by fusion alpha particles in an ignited tokamakPhysics of Fluids B: Plasma Physics, 1989
- Low-n shear Alfvén spectra in axisymmetric toroidal plasmasPhysics of Fluids, 1986
- The shear Alfvén continuous spectrum of axisymmetric toroidal equilibria in the large aspect ratio limitJournal of Plasma Physics, 1982