Confinement physics of the advanced scenario with ELMy H-mode edge in ASDEX Upgrade
Confinement physics of the advanced scenario with ELMy H-mode edge in ASDEX Upgrade
复制标题
ASDEX 升级中具有 ELMy H 模式边缘的高级场景的约束物理
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
H. Zohm
中科院分区：
文献类型：
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作者：
A. Peeters;O. Gruber;S. Günter;M. Kaufmann;H. Meister;G. Pereverzev;F. Ryter;A. Sips;J. Stober;W. Suttrop;G. Tardini;R. Wolf;H. Zohm
详细分析了改进H模的限制物理。结果表明，这种情况下，可以在很大程度上统一的标准H-模式。输运障碍存在于放电的早期阶段，就在打开加热之后。然而，在稳态下，没有明确的内部传输障碍，可以确定在离子温度分布。然后，发现该配置文件是刚性的，并且改进的H-模式遵循与标准H-模式相同的离子温度缩放。限制对H-模式缩放的改善部分是由于这种缩放线平均密度的依赖性，部分是通过密度峰值出现在低密度。它表明，预热是不是必不可少的，在达到良好的限制。
The confinement physics of the improved H-mode is analysed in detail. It is shown that this scenario can be largely unified with that of the standard H-mode. Transport barriers exist in the early phase of the discharge just after the switch on of the heating. In steady state, however, no clear internal transport barriers can be indentified in the ion temperature profiles. The profiles are then found to be stiff and the improved H-mode follows the same ion temperature scaling as the standard H-mode. The improvement of the confinement against the H-mode scaling is partly due to the dependence of this scaling on the line averaged density, and is partly obtained through density peaking appearing at low densities. It is shown that pre-heating is not essential in reaching the good confinement.