ITER edge-localized modes control coils: the effect on fast ion losses and edge confinement properties
ITER edge-localized modes control coils: the effect on fast ion losses and edge confinement properties
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DOI：
10.1088/0741-3335/54/10/105008
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发表时间：
2012-10
影响因子：
2.2
通讯作者：
T. Koskela;O. Asunta;E. Hirvijoki;T. Kurki-Suonio;S. Äkäslompolo
中科院分区：
文献类型：
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作者：
T. Koskela;O. Asunta;E. Hirvijoki;T. Kurki-Suonio;S. Äkäslompolo
由于容器内线圈的磁扰动，预计减轻边缘局域模式（ELMs）在ITER，也可能危及高能离子的约束。利用阿斯科特程序模拟了环向场线圈、铁氧体插件、测试包层模块和ELM控制线圈（ECC）等引起的三维扰动对ITER中聚变α粒子和中性束注入产生的快离子损失的影响。ECC被发现在15 MA电感参考操作场景中随机化基座内部深处的磁场。这样的字段被发现不足以限制不仅快速，而且热离子的人口，导致在边缘的快速离子源大大减少。因此，即使具有随机边缘，也不期望高的快离子功率负载。然而，等离子体响应尚未包括在ITER磁背景数据的计算中，并且目前可能高估了扰动。
The magnetic perturbations due to in-vessel coils, foreseen to mitigate edge-localized modes (ELMs) in ITER, could also compromise the confinement of energetic ions. We simulate the losses of fusion alpha particles and neutral beam injection-generated fast ions in ITER under the influence of the 3D perturbations caused by toroidal field coils, ferritic inserts, test blanket modules and ELM control coils (ECCs) with the ASCOT code. The ECCs are found to stochastize the magnetic field deep inside the pedestal in the 15 MA inductive reference operating scenario. Such a field is found insufficient to confine not only the fast but also the thermal ion population, leading to a strongly reduced fast ion source in the edge. Therefore, even with a stochastic edge, no high fast ion power loads are expected. However, the plasma response has not yet been included in the calculation of ITER magnetic background data, and it is probable that the perturbation is currently overestimated.