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LINEAR MHD STABILITY ANALYSIS OF POST-DISRUPTION PLASMAS IN ITER

机译:扰动后等离子体的MHD线性稳定性分析

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Most of the plasma current can be replaced by a runaway electron (RE) current during plasma disruptions in ITER. In this case the post-disruption plasma current profile is likely to be more peaked than the pre-disruption profile. The MHD activity of such plasma will affect the runaway electron generation and confinement and the dynamics of the plasma position evolution (Vertical Displacement Event), limiting the timeframe for runaway electrons and disruption mitigation. In the present paper we evaluate the influence of the possible RE seed current parameters on the onset of the MHD instabilities. By varying the RE seed current profile we search for subsequent plasma evolutions with the highest and the lowest MHD activity. This information can be applied to a development of desirable ITER disruption scenario.
机译:在ITER中发生等离子体破坏期间,大部分等离子体电流可以由失控电子(RE)电流代替。在这种情况下,破裂后的等离子体电流曲线可能比破裂前的曲线更为尖峰。此类等离子体的MHD活性将影响电子的失控生成和限制以及等离子体位置演化的动力学(垂直位移事件),从而限制了电子失控和破坏缓解的时间框架。在本文中,我们评估可能的RE种子电流参数对MHD不稳定性发作的影响。通过改变RE种子的电流分布图,我们搜索MHD活性最高和最低的后续血浆进化。该信息可用于开发理想的ITER破坏情景。

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