边缘局域理想气球模的非线性陀螺流体计算
Nonlinear gyrofluid computation of edge localised ideal ballooning modes
摘要：
对托卡马克边缘局域模（ELMs）的理想气球模吹出情形进行了三维电磁陀螺流体模拟。特别强调的是放在充满活力的诊断，检查在线性，过冲和衰减阶段的增长率的变化。饱和过程是能量转移到自产生的边缘湍流，表现出离子温度梯度（ITG）模式结构。只有当光谱到达离子回旋半径时，才能发现衰变阶段的收敛。平衡是一个自洽的背景，其演变考虑。边缘层中的总能量的大约三分之二在井喷中释放。研究了等离子体压力和离子回旋半径对参数的影响。尽管短暂的过程的暴力性质，过渡到非线性是非常相似的通用托卡马克边缘湍流。
英文摘要：
Three dimensional electromagnetic gyrofluid simulations of the ideal ballooning mode blowout scenario for tokamak edge localized modes (ELMs) are presented. Special emphasis is placed on energetic diagnosis, examining changes in the growth rate in the linear, overshoot, and decay phases. The saturation process is energy transfer to self generated edge turbulence which exhibits an ion temperature gradient (ITG) mode structure. Convergence in the decay phase is found only if the spectrum reaches the ion gyroradius. The equilibrium is a self consistent background whose evolution is taken into account. Approximately two thirds of the total energy in the edge layer is liberated in the blowout. Parameter dependence with respect to plasma pressure and the ion gyroradius is studied. Despite the violent nature of the short-lived process, the transition to nonlinearity is very similar to that found in generic tokamak edge turbulence.
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