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首页> 外文期刊>Nuclear fusion >Strike point splitting in the heat and particle flux profiles compared with the edge magnetic topology in a n = 2 resonant magnetic perturbation field at JET
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Strike point splitting in the heat and particle flux profiles compared with the edge magnetic topology in a n = 2 resonant magnetic perturbation field at JET

机译：在JET的n = 2共振磁扰动场中，与边缘磁拓扑相比，热和粒子通量分布中的拐点分裂

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摘要

At JET the error field correction coils can be used to generate ann = l or n = 2 magnetic perturbation field (Liang et al 2007 Plasma Phys. Control. Fusion 49 B581). Various experiments at JET have already been carried out to investigate the mitigation of ELMs by resonant magnetic perturbations (RMPs) (Liang et al 2010 Nucl. Fusion 50 025013, Liang et al 2011 Nucl. Fusion 51 073001). However, the typical formation of a secondary strike point (strike point splitting) by RMPs observed in other machines (Jakubowski et al 2010 Contrib. Plasma Phys. 50 701-7, Jakubowski et al 2004 Nucl. Fusion 44 Sl-11, Nardon et al 2011 J. Nucl. Mater. 415 S914-7, Eich et al 2003 Phys. Rev. Lett. 91 195003, Evans etal 2007 J. Nucl. Mater. 363-365 570-4, Evans et al 2005 J. Phys.: Conf. Ser. 7 174-90, Watkins et al 2009 J. Nucl. Mater. 390-391 839-42) has never been observed at JET before. In this work we will present discharges where for the first time a strike point splitting by RMPs at JET has been observed. We will show that in these particular cases the strike point splitting matches the vacuum edge magnetic field topology. This is done by comparing heat and particle flux profiles on the outer divertor plate with the magnetic footprint pattern obtained by field line tracing. Further the evolution of the strike point splitting during the ramp up phase of the perturbation field and during a q_(95) -scan is investigated, and it will be shown that the spontaneous appearance of the strike point splitting is only related to some geometrical effects of the toroidal asymmetric magnetic topology.
机译：在JET处，可以使用误差场校正线圈来生成ann = 1或n = 2磁扰动场（Liang等，2007 Plasma Phys。Control。Fusion 49 B581）。在JET上已经进行了各种实验，以研究通过共振磁扰动（RMP）减轻ELM的方法（Liang等人2010 Nucl。Fusion 50 025013，Liang等人2011 Nucl。Fusion 51 073001）。然而，在其他机器中观察到的典型的RMP形成二级打击点（打击点分裂）（Jakubowski等人2010 Contrib.Plasma Phys.50 701-7，Jakubowski等人2004 Nucl.Fusion 44 Sl-11，Nardon等人）等人，2011 J. Nucl。Mater。415 S914-7，Eich等人，2003 Phys。Rev. Lett。91 195003，Evans等人，2007 J. Nucl。Mater。363-365 570-4，Evans等人，2005 J. Phys。 ：J。Conf。Ser。7 174-90，Watkins等人，2009 J. Nucl。Mater。390-391 839-42）以前从未在JET上观察到。在这项工作中，我们将介绍首次在JET上观察到由RMP划伤的罢工点。我们将显示在这些特定情况下，触击点分裂与真空边缘磁场拓扑匹配。这是通过将外部偏滤器板上的热量和颗粒通量曲线与通过磁力线跟踪获得的磁足迹​​图案进行比较来完成的。进一步研究了在扰动场的上升阶段和q_（95）-scan期间触击点分裂的演变，并且将显示触击点分裂的自发外观仅与某些几何效应有关环形不对称磁拓扑的示意图。

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  • 来源
    《Nuclear fusion》 |2012年第5期|p.054009.1-054009.9|共9页
  • 作者

    D.M. Halting; Y. Liang; S. Jachmich; R. Koslowski; G. Arnoux; S. Devaux; T. Eich; E. Nardon; D. Reiter; H. Thomsen;

  • 作者单位

    Institute of Energy and Climate Research - Plasma Physics, Forschungszentrum Jiilich GmbH,Association EURATOM-FZJ, Juelich, Germany,JET-EFDA, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    Institute of Energy and Climate Research - Plasma Physics, Forschungszentrum Jiilich GmbH,Association EURATOM-FZJ, Juelich, Germany,JET-EFDA, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    Laboratory for Plasma Physics, Ecole Royale Militaire/Koninklijke Militaire School, EURATOM-Association Belgian State, Brussels, Belgium,JET-EFDA, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    Institute of Energy and Climate Research - Plasma Physics, Forschungszentrum Jiilich GmbH,Association EURATOM-FZJ, Juelich, Germany,JET-EFDA, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    EURATOM-CCFE Fusion Association, Culham Science Center, Culham, 0X14 3DB, Abingdon, UK,JET-EFDA, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    Max-Planck-Institut fur Plasmaphysik, EURATOM-Association, D-85748 Garching, Germany,JET-EFDA, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    Max-Planck-Institut fur Plasmaphysik, EURATOM-Association, D-85748 Garching, Germany,JET-EFDA, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    Association EURATOM/CEA, CEA Cadarache, F-13108, St Paul-lez-Durance, France,JET-EFDA, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    Institute of Energy and Climate Research - Plasma Physics, Forschungszentrum Jiilich GmbH,Association EURATOM-FZJ, Juelich, Germany,JET-EFDA, Culham Science Centre, Abingdon, 0X14 3DB, UK;

    Max-Planck-Institut fiir Plasmaphysik, EURATOM-Association, D-17491 Greifswald, Germany,JET-EFDA, Culham Science Centre, Abingdon, 0X14 3DB, UK;

  • 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);
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