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arXiv 2301.12911physics.plasm-ph
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托卡马克中弹丸注入后烧蚀材料的漂移

Drift of ablated material after pellet injection in a tokamak

O. Vallhagen, I. Pusztai, P. Helander, S. L. Newton, T. Fülöp

AI总结:

针对托卡马克弹丸注入后烧蚀材料跨场漂移模拟计算昂贵的问题,提出考虑 Alfvén 电流和欧姆电流的一维半解析径向位移模型,实现快速计算并支持破裂缓解建模。

摘要:

弹丸注入用于托卡马克中的加料和放电控制,并预计将在 ITER 中采用。在弹丸注入期间,由于磁场的不均匀性,烧蚀材料会向低场侧(即大半径向外方向)运动。由于理论模型的复杂性,为模拟跨场漂移而开发的计算机程序计算成本很高。本文提出了一种一维半解析模型,用于描述弹丸注入后烧蚀材料的径向位移;该模型同时考虑了使产生漂移的电荷分离发生短路的 Alfvén 电流和欧姆电流。该模型适用于快速计算径向漂移位移,并可用于例如通过弹丸注入缓解破裂的建模。

英文摘要:

Pellet injection is used for fuelling and controlling discharges in tokamaks, and it is foreseen in ITER. During pellet injection, a movement of the ablated material towards the low-field side (or outward major radius direction) occurs because of the inhomogeneity of the magnetic field. Due to the complexity of the theoretical models, computer codes developed to simulate the cross-field drift are computationally expensive. Here, we present a one-dimensional semi-analytical model for the radial displacement of ablated material after pellet injection, taking into account both the Alfvén and ohmic currents which short-circuit the charge separation creating the drift. The model is suitable for rapid calculation of the radial drift displacement, and can be useful for e.g. modelling of disruption mitigation via pellet injection.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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