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The effect of magnetic equilibrium on auxiliary heating schemes and fast particle confinement in Wendelstein 7-X

机译：磁性平衡对Wendelstein 7-X的辅助加热方案和快速粒子约束的影响

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The performance of the auxiliary heating systems ion cyclotron resonance heating and neutral beam injection is calculated in three different magnetic mirror configurations foreseen to be used in future experiments in the Wendelstein 7-X stellarator: low, standard and high mirror. This numerical work is implemented with the SCENIC code package, which is designed to model three-dimensional magnetic equilibria whilst retaining effects such as anisotropy and the influence of including a finite orbit width of the particles. The ability to simulate NBI deposition in three-dimensional equilibria, the implementation of the realistic beam injector geometry, and the modification of the SCENIC package to permit the investigation of the 3-ion species heating scheme, are recent developments. Using these modifications, an assessment of the advantages and disadvantages of these two fast-ion producing auxiliary heating systems is made in the three different magnetic mirror equilibria. For NBI heating, the high mirror configuration displays the best global confinement properties, resulting in a larger collisional power transfer to the background plasma. The standard mirror has the best particle confinement in the core region, but the worst towards the edge of the plasma. The low mirror has the largest lost power and thus the lowest total collisional power. For ICRH, the displacement of the RF-resonant surface significantly impacts the heating performance. Due to the large toroidal magnetic mirror in the high mirror equilibrium, resonant particles easily become trapped and cannot remain in resonance, generating only small energetic particle populations. Despite this, global confinement is still the strongest in this equilibrium. The low mirror is the only equilibrium to produce peaked on-axis collisional power deposition, with associated peaked on-axis fast ion pressure profiles. A highly energetic particle population is then produced but this results in larger lost power as this equ
机译：辅助加热系统离子回旋谐振加热和中性光束注射的性能在三种不同的磁镜配置中计算，以便在Wendelstein 7-X Sterlarator的未来实验中使用：低，标准和高镜子。该数值工作是用景区代码包实现的，该代码包装设计成模拟三维磁性均衡，同时保持诸如各向异性的效果和包括颗粒的有限轨道宽度的影响。在三维平衡中模拟NBI沉积的能力，实际光束喷射器几何形状的实现，以及允许调查3离子物种加热方案的风景封装的改进，是最近的发展。使用这些修改，在三种不同的磁镜平衡中进行了这两个快速离子产生辅助加热系统的优点和缺点的评估。对于NBI加热，高镜面配置显示最佳的全球监禁属性，导致到背景等离子体的巨大碰撞动力传输。标准镜具有核心区域的最佳粒子限制，但朝向等离子体边缘的最坏情况。低镜具有最大的功率，因此总碰撞电力最低。对于ICRH，RF-谐振表面的位移显着影响了加热性能。由于高镜式平衡中的大环形磁镜，谐振颗粒容易被捕获，不能保持共振，仅产生小的能量粒子群。尽管如此，全球监禁仍然是这种均衡中最强的。低镜子是唯一的平衡，用于产生尖锐的轴碰撞功率沉积，相关的峰轴快速离子压力轮廓。然后产生高度充满活力的颗粒群，但这导致较大损失功率，因为​​这架

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