Effect of Trapped Energetic Ions on MHD Activity in Spherical Tori

White, R.B. ; Kolesnichenko, Ya.I. ; Lutsenko, V.V. ; Marchenko, V.S.

Princeton University. Plasma Physics Laboratory.

关键词: 70 Plasma Physics And Fusion Technology;    Stability;    Distribution;    Magnetic Fields;    Plasma Pressure;   

DOI  :  10.2172/798181
RP-ID  :  PPPL-3694.pdf
RP-ID  :  AC02-76CH03073
RP-ID  :  798181

美国|英语

来源: UNT Digital Library

【 摘 要 】

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.