论文标题
ITER的线性稳定性15 MA场景针对Alpha鱼骨
Linear stability of the ITER 15 MA scenario against the alpha fishbone
论文作者
论文摘要
$ n = m = 1 $ alpha-fishbone动力学MHD模式在ITER 15 mA基线方案\ cite {iterb}上的稳定性使用非线性混合动力学MHD代码XTOR XTOR-K分析。在\ cite {brochard2018}中使用线性模型计算的复杂频率$ω+Iγ$之间发现了定量一致性。线性模型和XTOR-K之间还发现了相位空间中相同的进型共振位置。在ITER 15 MA方案上使用XTOR-K进行的线性混合模拟表明，这种配置可能在Alpha鱼骨模式下不稳定。动力学MHD平衡的鱼骨阈值与固定安全系数的平面齐平度低于统一，在$β_{α，thres}/β_{tot} = 6-10 \％$之间，而iter的预期beta比率为$β_α/β_/β_{$β_/β_{$β_{$β_{$ 15-20 = 15-20 = 15-20 = 15-20 = 15-20。
The stability of the $n=m=1$ alpha-fishbone kinetic-MHD mode on the ITER 15 MA baseline scenario \cite{ITERB} is analyzed using the nonlinear hybrid Kinetic-MHD code XTOR-K. Quantitative agreement is found between the complex frequencies $ω+ iγ$ computed with the linear model in \cite{Brochard2018} and XTOR-K's linear simulations. Identical precessional resonance positions in phase space are also found between the linear model and XTOR-K. Linear hybrid simulations performed with XTOR-K on the ITER 15 MA scenario reveal that this configuration is likely to be unstable against the alpha fishbone mode. The fishbone thresholds for kinetic-MHD equilibria with flat q profiles with on-axis safety factor just below unity lies between $β_{α,thres}/β_{tot} = 6-10\%$, whereas the expected beta ratio on ITER is $β_α/β_{tot} = 15-20\%$ \cite{ITERB}.
