在低混合谐振下分析的边缘功率损耗：与ANTITER IV的比较和对ICRH系统的应用
Analytical edge power loss at the lower hybrid resonance: comparison with ANTITER IV and application to ICRH systems
摘要：
在非反向加热情况下，托卡马克等离子体边缘会出现低杂波（LH）共振。当在离子回旋共振频率（ICRF）范围内加热时，该共振可导致大的边缘功率沉积。在本文中，边缘功率损耗与LH共振解析计算冷等离子体描述使用渐近方法和解析延拓。该功率损耗可以直接与局部径向电场相关联，然后与用半分析代码ANTITER IV计算的相应功率损耗进行比较。这种方法提供了可能性，以检查精度的数值积分在ANTITER IV，并给出了见解的物理基础的边缘功率吸收。最后，解决方案，以尽量减少这种边缘功率吸收的影响，并适用于ITER的离子回旋共振加热（ICRH）发射器的情况下。这项研究也与DEMO直接相关。
英文摘要：
In non-inverted heating scenarios, a lower hybrid (LH) resonance can appear in the plasma edge of tokamaks. This resonance can lead to large edge power deposition when heating in the ion cyclotron resonance frequency (ICRF) range. In this paper, the edge power loss associated with this LH resonance is analytically computed for a cold plasma description using an asymptotic approach and analytical continuation. This power loss can be directly linked to the local radial electric field and is then compared to the corresponding power loss computed with the semi-analytical code ANTITER IV. This method offers the possibility to check the precision of the numerical integration made in ANTITER IV and gives insights in the physics underlying the edge power absorption. Finally, solutions to minimize this edge power absorption are investigated and applied to the case of ITER's ion cyclotron resonance heating (ICRH) launcher. This study is also of direct relevance to DEMO.
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