Impurity seeding will be an important tool to reduce the peak power loads and temperatures at the divertor targets in future tokamak devices. To improve the physics understanding and provide predictive capabilities for the impact of impurities on the plasma, different impurity species have to be investigated and compared to each other. For this purpose SOLPS 5.0 simulations of argon (Ar) and nitrogen (N) seeded H-mode plasmas for ASDEX Upgrade have been performed. The (purely numerical) investigations extend previous studies dedicated to impurity transport and to the divertor impurity retention. An analysis of mixed Ar and N impurity seeding reveals that a trade-off between pedestal top temperature drop and fuel dilution can be achieved by an adjustment of the impurity mixture. Due to the impact of the impurities on the temperatures, the impurity seeding reduces the main ion ionization rates in the divertor regions, and therefore, the ion particle sources. Accordingly, this modi...

中文翻译：

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用于ASDEX升级的Ar和N种子SOLPS 5.0模拟中的杂质传输和偏滤器保留

杂质注入将是减少未来托卡马克设备中分流器目标的峰值功率负载和温度的重要工具。为了提高物理学理解并提供杂质对等离子体影响的预测能力，必须研究不同的杂质种类并将其相互比较。为此，已经进行了ASDEX升级的氩（Ar）和氮（N）种子H型等离子体的SOLPS 5.0模拟。（纯数值的）研究扩展了以前的专门研究杂质转移和偏滤器杂质保留的研究。对混合的Ar和N杂质晶种的分析表明，可以通过调整杂质混合物来实现基座顶部温度下降与燃料稀释之间的权衡。由于杂质对温度的影响，杂质注入降低了偏滤器区域中的主要离子电离速率，因此降低了离子粒子源。因此，这种修改...