The stability of the n=m=1 alpha-fishbone kinetic-MHD mode on the ITER 15 MA baseline scenario 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 βα,thres/βtot= 6-10\%, whereas the expected beta ratio on ITER is βα,thres/βtot = 15-20\%

中文翻译：

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ITER 15 MA 情景对 alpha 鱼骨线的线性稳定性

使用非线性混合动力学-MHD 代码 XTOR-K 分析了 n=m=1 α-鱼骨动力学-MHD 模式在 ITER 15 MA 基线情景下的稳定性。在 \cite{Brochard2018} 和 XTOR-K 的线性模拟中使用线性模型计算的复频率 ω+iγ 之间存在定量一致性。在线性模型和 XTOR-K 之间还发现了相空间中相同的进动共振位置。在 ITER 15 MA 场景中使用 XTOR-K 执行的线性混合模拟表明，这种配置可能对 alpha 鱼骨模式不稳定。动力学-MHD 平衡的鱼骨阈值具有平坦的 q 曲线，轴上安全系数略低于 1，介于 βα,thres/βtot= 6-10\% 之间，而 ITER 上的预期 Beta 比率为 βα,thres/βtot = 15 -20\%