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Linear stability of the ITER 15 MA scenario against the alpha fishbone

机译:ITER 15 MA情景对α鱼叉的线性稳定性

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摘要

The stability of the n = m = 1 alpha-fishbone kinetic-MHD mode on the ITER 15 MA baseline scenario (ITER Physics Expert Group on Energe Drive and ITER Physics Basis 1999 Nucl. Fusion 39 2471-95) is analyzed using the non-linear hybrid kinetic-MHD code XTOR-K. Quantitative agreement is found between the complex frequencies ω +iγ computed with the linear model in (Brochard G. et al 2018 J. Phys.: Conf. Series 1125 012003) 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% (ITER Physics Expert Group on Energe Drive and ITER Physics Basis 1999 Nucl. Fusion 39 2471-95).
机译:n = m = 1个alpha-fishbone动力学模式的稳定性在磨练15 mA基线场景(Energe Price专家组energe Drive和Iter物理基础199999.989999)。使用非 - 融合39 2471-95)进行分析。线性混合动力学-MHD码XTOR-k。在用线性模型中计算的复频ωΩ+iγ之间的定量协议(Crochard G.等人2018 J. phys:Conf。系列1125 012003)和XTOR-K的线性模拟。在线性模型和XTOR-k之间也发现相位空间中相同的预谐振位置。在迭代的XTOR-K上执行的线性混合模拟15MA场景显示,这种配置可能对α鱼骨模式不稳定。用于动力学-MHD均衡的鱼骨阈值,具有平坦的Q型材,在轴上的安全系数均在统一以下均为β-(α,Thres)/β_(Tot)= 6-10%,而浸泡的预期β比是β_α/ β_(Tot)= 15 - 20%(ENTER Physics Expere Group上的Energe Drive和Iter物理基础1999 Nucl。融合39 2471-95)。

著录项

  • 来源
    《Nuclear fusion》 |2020年第8期|086002.1-086002.16|共16页
  • 作者单位

    CEA IRFM F-13 108 Saint-Paul-lez-Durance France CPHT CNRS Ecole Polytechnique Institut Polytechnique de Paris Route de Saclay 91128 Palaiseau France;

    CEA IRFM F-13 108 Saint-Paul-lez-Durance France;

    CPHT CNRS Ecole Polytechnique Institut Polytechnique de Paris Route de Saclay 91128 Palaiseau France;

    CEA IRFM F-13 108 Saint-Paul-lez-Durance France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    MHD; kinetic-MHD; linear theory; ITER; XTOR-K; alpha fishbone instability; linear verification;

    机译:MHD;动力学 - mhd;线性理论;erter;Xtor-k;alpha鱼骨不稳定;线性验证;

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