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Impurity transport in the pedestal of H-mode plasmas with resonant magnetic perturbations

机译：H模式等离子体底座的杂质输送具有共振磁扰动

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Experiments on DIII-D show that resonant magnetic perturbations (RMPs) reduce the impurity confinement time in the H-mode pedestal below that of naturally ELMy plasmas. STRAHL modeling of discharges with aluminum laser blow off (LBO) injection show increased diffusion in the pedestal of H-mode discharges with RMPs. The increased diffusion from the RMPs provides improved impurity control compared to the naturally ELMy discharges and prevents the buildup of impurities near the edge of the plasma. Tungsten LBO injection into discharges with and without RMPs led to striking differences in the evolution of the discharge. The naturally ELMy discharge became ELM free and showed an increase in edge radiation, leading to the eventual radiative collapse of the plasma. Injecting a similar number of W particles into discharges with RMPs, either with or without ELMs, led to a measurable accumulation of core W but did not significantly impact the evolution of the discharge. These results indicate that RMPs are beneficial for controlling the buildup of impurities in the pedestal region of the plasma.
机译：DIII-D的实验表明，谐振磁扰动（RMPS）降低了H模式基座中的杂质限制时间，低于天然榆树等离子体的H模式基座。用铝激光吹除（LBO）注射液的斯特拉尔建模（LBO）注射显示H模式排放座中的扩散增加。与天然弹性放电相比，来自RMP的扩散的增加​​提供了改善的杂质控制，并防止了等离子体边缘附近的杂质的累积。钨LBO注射进入放电，没有RMPS导致放电进化的引起差异。自然的榆树放电变得榆树自由，并显示出边缘辐射的增加，导致血浆的最终辐射坍塌。用RMPS注入类似数量的W颗粒，无论是在没有elm的情况下，导致核心W的可测量积累，但没有显着影响放电的演变。这些结果表明RMPS有利于控制等离子体的基座区域中的杂质的积聚。

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