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arXiv 2406.16375physics.plasm-ph
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由一维刮削层模拟导出的脱靶标度律

Detachment scalings derived from 1D scrape-off-layer simulations

Thomas Body, Thomas Eich, Adam Q Kuang, Thomas Looby, Mike Kryjak, Benjamin D Dudson, Matthew Reinke

AI总结:

本文利用Hermes-3框架进行一维含时脱靶模拟,再现离子通量翻转,验证其稳态结果符合Lengyel-Goedheer标度律,并通过与SOLPS比较提出改进方向。

摘要:

聚变电厂将需要脱靶来减轻溅射并将偏滤器热流维持在可容忍的水平。在这些装置上控制脱靶可能需要使用实时刮削层建模来补充有限的可用诊断。在本工作中,我们使用可配置的Hermes-3边缘建模框架执行含时间依赖、固定比例杂质的1D脱靶模拟。尽管目前远未达到实时,这些模拟被用于研究时间依赖效应以及控制相关建模所需的最小物理集合。我们表明这些模拟再现了预期的靶离子通量翻转——这是脱靶起始的一个典型特征。我们还对输入热流和杂质浓度进行了扫描,并表明稳态结果与0D时间无关Lengyel-Goedheer模型预测的标度律高度吻合。这使我们能够间接地与SOLPS模拟进行比较,后者发现了类似的标度律,但在给定上游条件下所需脱靶杂质浓度值更低。我们利用这一结果提出了一系列针对Hermes模拟的改进建议,并最终展示了说明时间依赖性影响的模拟。

英文摘要:

Fusion power plants will require detachment to mitigate sputtering and keep divertor heat fluxes at tolerable levels. Controlling detachment on these devices may require the use of real-time scrape-off-layer modeling to complement the limited set of available diagnostics. In this work, we use the configurable Hermes-3 edge modeling framework to perform time-dependent, fixed-fraction-impurity 1D detachment simulations. Although currently far from real-time, these simulations are used to investigate time-dependent effects and the minimum physics set required for control-relevant modeling. We show that these simulations reproduce the expected rollover of the target ion flux - a typical characteristic of detachment onset. We also perform scans of the input heat flux and impurity concentration and show that the steady-state results closely match the scalings predicted by the 0D time-independent Lengyel-Goedheer model. This allows us to indirectly compare to SOLPS simulations, which find a similar scaling but a lower value for the impurity concentration required for detachment for given upstream conditions. We use this result to suggest a series of improvements for the Hermes simulations, and finally show simulations demonstrating the impact of time-dependence.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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