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首页> 外文期刊>Nuclear fusion >Particle-in-cell simulations of the plasma interaction with poloidal gaps in the ITER divertor outer vertical target
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Particle-in-cell simulations of the plasma interaction with poloidal gaps in the ITER divertor outer vertical target

机译：在ITER偏滤器外部垂直目标中与极性间隙发生等离子体相互作用的粒子模拟

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摘要

Predictive modelling of the heat flux distribution on ITER tungsten divertor monoblocks is a critical input to the design choice for component front surface shaping and for the understanding of power loading in the case of small-scale exposed edges. This paper presents results of particle-in-cell (PIC) simulations of plasma interaction in the vicinity of poloidal gaps between monoblocks in the high heat flux areas of the ITER outer vertical target. The main objective of the simulations is to assess the role of local electric fields which are accounted for in a related study using the ion orbit approach including only the Lorentz force (Gunn et al 2017 Nucl. Fusion 57 046025). Results of the PIC simulations demonstrate that even if in some cases the electric field plays a distinct role in determining the precise heat flux distribution, when heat diffusion into the bulk material is taken into account, the thermal responses calculated using the PIC or ion orbit approaches are very similar. This is a consequence of the small spatial scales over which the ion orbits distribute the power. The key result of this study is that the computationally much less intensive ion orbit approximation can be used with confidence in monoblock shaping design studies, thus validating the approach used in Gunn et al (2017 Nucl. Fusion 57 046025).
机译：ITER钨分流器整块上的热通量分布的预测模型是组件前表面整形设计的关键输入，对于小规模裸露边缘情况下的功率负载理解也是至关重要的选择。本文介绍了在ITER外垂直靶的高热通量区域内单嵌段之间的多倍性间隙附近的等离子体相互作用的细胞内粒子（PIC）模拟结果。模拟的主要目的是评估局部电场的作用，该研究在相关研究中使用离子轨道方法进行了解释，只包括洛伦兹力（Gunn等人2017 Nucl.Fusion 57 046025）。 PIC模拟的结果表明，即使在某些情况下电场在确定精确的热通量分布中起着独特的作用，当考虑到散装材料中的热扩散时，使用PIC或离子轨道方法计算出的热响应非常相似。这是由于离子轨道在其上分布功率的空间尺度很小的结果。这项研究的关键结果是，在整块成形设计研究中可以放心地使用计算强度较低的离子轨道近似，从而验证了Gunn等人（2017 Nucl.Fusion 57 046025）中使用的方法。

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  • 来源
    《Nuclear fusion》 |2017年第12期|545-556|共12页
  • 作者

    M. Komm; J.P. Gunn; R. Dejarnac; R. Panek; R.A. Pitts; A. Podolnik;

  • 作者单位

    Institute of Plasma Physics of the CAS, Za Slovankou 3, 182 00 Prague 8, Czech Republic;

    CEA, IRFM, F-13108 Saint-Paul-Lez-Durance, France;

    Institute of Plasma Physics of the CAS, Za Slovankou 3, 182 00 Prague 8, Czech Republic;

    Institute of Plasma Physics of the CAS, Za Slovankou 3, 182 00 Prague 8, Czech Republic;

    ITER Organization, Route de Vinon-sur-Verdon, CS 90 046, 13067 St. Paul Lez Durance Cedex, France;

    Institute of Plasma Physics of the CAS, Za Slovankou 3, 182 00 Prague 8, Czech Republic,Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic;

  • 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

    tokamak; plasma; ITER; particle-in-cell; heat loads; monoblock;

    机译：托卡马克等离子体;ITER;细胞内颗粒热负荷;单块;

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