Toroidal Resonance of Energetic Ions and Magnetohydrodynamic Ballooning Mode Stability in Tokamaks

概要

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Excitation of resonant mode of energetic particles and their effect on themagnetohydrodynamic (MHD) ballooning mode in tokamaks are studied byevaluating the dispersion relation derived from the modified ballooning mode equalion which includes the kinetic effect of energetic ions. The kinetic effect is evaluatedby solving the gyrokinetic equation for non-periodic and periodic passing particlesand trapped particles. The periodic component of energetic passing Tons is found tomake important contribution in the inertial region, and stabilizes the MHD ballooning mode. At the MHD ballooning mode marginal stability condition, the toroidalresonant mode becomes unstable above a threshold of the energetic passing ion con-tribution. This toroidal resonant mode is further destabilized in the presence of thebulk plasma fluid effect.[energetic passing ions,gyrokinetic solutions, toroidal resonance, stabilization of ll ballooning model
社団法人日本物理学会の論文
1990-01-15