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Author(s):
T.Yamagishi
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Title:
Effect of Energetic Particle Distribution on Bounce Resonance Excitation of the Ideal Ballooning Mode
Date of publication:
Feb. 1991
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Key words:
Energetic trapped particles, bounce resonance excitation, averaged ballooning mode equation, tokamak, circular crosssection, inertial range, Stabilization by slowing down distribution
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Abstract:
The kinetic effect of energetic trapped particles on the stability of magnetohydrodynamic(MHD) ballooning mode is studied in a tokamak with the circular cross section. The bounce resonance contribution of trapped energetic particles is found to play an important role in the outer inertial region of the ballooning mode perturbation, and destabilizes the ballooning mode when the shear effect is not strong. The inhomogeniety of a model slowing down energetic particle distribution in velocity space, partial F/partial E, is effective to stabilize the bounce resonant mode.
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