Trapped particle destabilization of the internal kink mode

Journal Article · Tue Jan 01 00:00:00 EST 1985 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.865198· OSTI ID:5991291

White, R B; Chen, L; Romanelli, F; Hay, R

The internal kink mode is destabilized by trapped high-energy particles, leading to a new branch of the internal kink dispersion relation with a real frequency near the average trapped-particle precession frequency and a growth rate of the same magnitude. This trapped particle branch of the dispersion relation is investigated numerically for a variety of particle distributions. Mode growth rate and frequency is found as a function of plasma ..beta.., density, and trapped-particle energy and distribution. The high-energy trapped particle sources considered are neutral beam injection, ion-cyclotron heating, and fusion alpha particles. Relevance for various plasma heating schemes is discussed.

• Research Organization: Plasma Physics Laboratory, Princeton University, P. O. Box 451, Princeton, New Jersey 08544
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 5991291
• Journal Information: Phys. Fluids; (United States), Vol. 28:1
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
KINK INSTABILITY
DISPERSION RELATIONS
PLASMA
BETA RATIO
DISTRIBUTION
ENERGY
INSTABILITY GROWTH RATES
NUMERICAL SOLUTION
PLASMA DENSITY
TRAPPED-PARTICLE INSTABILITY
INSTABILITY
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
700107* - Fusion Energy- Plasma Research- Instabilities