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首页> 外文期刊>Bulletin of the American Physical Society >APS -59th Annual Meeting of the APS Division of Plasma Physics - Event - Understanding helium transport: experimental and theoretical investigations of low-Z impurity transport at ASDEX Upgrade
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APS -59th Annual Meeting of the APS Division of Plasma Physics - Event - Understanding helium transport: experimental and theoretical investigations of low-Z impurity transport at ASDEX Upgrade

机译：APS -59血浆物理学APS分工年会 - 事件 - 了解氦运输：ASDEX升级对低Z杂质运输的实验和理论研究

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摘要

The presence of helium is fundamentally connected to the performance of a fusion reactor. To predict the helium density profile in future fusion devices, understanding of helium transport is indispensable, as are experimentally validated theoretical models of the low-Z impurity turbulent transport. At ASDEX Upgrade, detailed, multi-species investigations of low-Z impurity transport have been undertaken in dedicated experiments, resulting in an extensive database of helium and boron density profiles over a wide range of parameters relevant for turbulent transport (normalised gradients of the electron density, the ion temperature and the toroidal rotation). Detailed comparisons of the experimental density gradients of both impurities with gyrokinetic simulations of the turbulent transport have shown that a qualitative agreement between experiment and theory cannot always be obtained, with strong discrepancies observed in some cases. The role of rotodiffusion and fast ions will be discussed as possible explanations for these discrepancies, which indicate a missing element in our understanding of low-Z impurity transport.
机译：氦的存在基本上与融合反应器的性能相连。为了预测未来融合装置中的氦密度曲线，对氦运输的理解是必不可少的，因为实验验证了低Z杂质湍流运输的理论模型。在ASDEX升级，详细的，在专用实验中进行了低Z杂质传输的多种研究，从而在各种参数上进行了广泛的氦和硼密度曲线数据库，与湍流运输（电子标准化梯度密度，离子温度和环形旋转）。详细的湍流仿真杂质的实验密度梯度的比较表明，在某些情况下，不能总是获得实验与理论之间的定性协议，在某些情况下观察到的强烈差异。旋转区和快速离子的作用将作为这些差异的可能解释讨论，这表明我们对低Z杂质运输的理解中缺失的元素。

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