Effect of Trapped Energetic Ions on MHD Activity in Spherical Tori
It is shown that the increase of beta (the ratio of plasma pressure to the magnetic field pressure) may change the character of the influence of trapped energetic ions on MHD stability in spherical tori. Namely, the energetic ions, which stabilize MHD modes (such as the ideal-kink mode, collisionless tearing mode, and semi-collisional tearing mode) at low beta, have a destabilizing influence at high beta unless the radial distribution of the energetic ions is very peaked.
- Research Organization:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Organization:
- USDOE Office of Science (US)
- DOE Contract Number:
- AC02-76CH03073
- OSTI ID:
- 798181
- Report Number(s):
- PPPL-3694.pdf; TRN: US0202145
- Resource Relation:
- Other Information: PBD: 30 May 2002
- Country of Publication:
- United States
- Language:
- English
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