Error fields in the Wendelstein 7-X stellarator

被引：45

作者：

Lazerson, Samuel A. ^{[1
]}

Bozhenkov, Sergey ^{[2
]}

Israeli, Ben ^{[1
]}

Otte, Matthias ^{[2
]}

Niemann, Holger ^{[2
]}

Bykov, Victor ^{[2
]}

Endler, Michael ^{[2
]}

Andreeva, Tamara ^{[2
]}

Ali, Adnan ^{[2
]}

Drewelow, Peter ^{[2
]}

Jakubowski, Marcin ^{[2
]}

Sitjes, Aleix Puig ^{[2
]}

Pisano, Fabio ^{[3
]}

Cannas, Barbara ^{[3
]}

机构：

[1] Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA

[2] Max Planck Inst Plasma Phys, Greifswald, Germany

[3] Univ Cagliari, Cagliari, Italy

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2018年 / 60卷 / 12期

关键词：

stellarator; fusion; magnetic fields; MAGNETIC-FIELD; SYSTEM;

D O I：

10.1088/1361-6587/aae96b

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The role of error fields in stellarators is explored in this work through simulations of, and experiments performed on, the Wendelstein 7-X (W7-X) stellarator. Previous experimental results, based on limiter plasmas in W7-X, suggest that error fields are small in the experiment based on limiter plasmas. In this work, we document results from the first divertor campaign on W7-X with a focus on error fields resonant with the edge island divertor structure. Measurements obtained using divertor thermocouples corroborate earlier limiter results that the error fields are small and correctable, requiring only 5% of the total rated current of the trim coil system. The effect of these error fields on magnetic geometry and topology are investigated using the flux surface measurement technique. The resulting divertor thermal load asymmetry is modeled via field line diffusion and compared to experimental data.

引用

页数：11

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