论文标题

TCV中令人困惑的雪花分流的功率排气和核心兼容性兼容性

Power exhaust and core-divertor compatibility of the baffled snowflake divertor in TCV

论文作者

Gorno, Sophie, Colandrea, Claudia, Février, Olivier, Reimerdes, Holger, Theiler, Christian, Duval, Basil P, Lunt, Tilmann, Raj, Harshita, Sheikh, Umar A, Simons, Luke, Thornton, Andrew

论文摘要

在TCV中,造型雪花造成的雪花造成的低场(SF-LFS)在几何上进行了优化,增加了转移器中性压力,以评估移动闭合的作用(与无液压的SF-LFS相比)和磁性几何形状和磁性几何形状(与动力充足和核心核心和核心核能相比)。在氘中加热的L模式放电,并用氮用氮气接近脱落条件,其线平均密度约为4x10(19)M-3。发现SF-LFS配置中的挡板可将峰值外部目标热通量降低23%,而不会显着影响毫无无序的辐射区域的位置或核心偏见的兼容性。与困惑的SN相比,令人困惑的SF-LFS表现出外部目标热通量的降低高达66%,并且能够平衡热通量的罢工点分布。 N2播种的峰值量数量(例如热通量,电子温度和离子通量)和分离辐射功率,这些益处不那么显着。尽管SF-LF的辐射区域距离SF-LFS较远,而不是令人困惑的SN,但没有观察到核心限制的变化。核心有效电荷甚至表明SF-LFS的核心杂质渗透增加。这些实验构成了详细的模型验证和外推的良好参考,探索了重要的物理学,例如核心杂质屏蔽以及转移跨场传输对磁性几何形状的依赖。

A baffled Snowflake Minus Low-Field Side (SF-LFS) is geometrically-optimised in TCV, increasing divertor neutral pressure, to evaluate the roles of divertor closure (comparing with an unbaffled SF-LFS) and magnetic geometry (comparing with a baffled Single Null, SN) in power exhaust and core-divertor compatibility. Ohmically-heated L-mode discharges in deuterium, with a line-averaged core density of approximately 4x10(19) m-3, are seeded with nitrogen to approach detached conditions. Baffles in the SF-LFS configuration are found to reduce the peak outer target heat flux by up to 23%, without significantly affecting the location of the inter-null radiation region or the core-divertor compatibility. When compared to the baffled SN, the baffled SF-LFS exhibits a reduction in outer target heat flux by up to 66% and the ability to balance the strike-point distribution of heat flux. These benefits are less significant with N2 seeding, with similar peak target quantities (such as heat flux, electron temperature and ion flux) and divertor radiated power. Despite a radiating region located farther from the confined plasma for the SF-LFS than the baffled SN, no change in core confinement is observed. Core effective charge even indicates an increase in core impurity penetration for the SF-LFS. These experiments constitute a good reference for detailed model validations and extrapolations, exploring important physics such as core impurity shielding and the dependence of divertor cross-field transport on magnetic geometry.

扫码加入交流群

加入微信交流群

微信交流群二维码

扫码加入学术交流群,获取更多资源