Asymmetry of W7-X magnet system introduced by torus assembly

被引：4

作者：

Fellinger, Joris ^{[1
]}

Egorov, Konstantin ^{[1
]}

Kallmeyer, Johannes Peter ^{[1
]}

Bykov, Victor ^{[1
]}

Schauer, Felix ^{[1
]}

机构：

[1] Max Planck Inst Plasma Phys, Teilinst Greifswald, Greifswald, Germany

来源：

FUSION ENGINEERING AND DESIGN | 2014年 / 89卷 / 9-10期

关键词：

Wendelstein; 7-X; Magnet system; EM field error; Torus assembly; FE modelling;

D O I：

10.1016/j.fusengdes.2014.01.081

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The magnet system of the stellerator Wendelstein 7-X (W7-X) consists of 5 modules of 14 superconducting coils with complex 3D shape each. After manufacturing the coils and assembly of the modules on temporary stands, the position of each module on the machine base was successfully optimized to minimize the electromagnetic (EM) field asymmetry. This asymmetry originates from inevitable geometric deviations of the coils from the target shape due to manufacturing and assembly tolerances. However, new deviations were introduced after module optimization due to bolting the modules of the magnet system together to a torus, removing temporary supports and further loading of the machine base with weight of additional components. In this paper, the geometrical deviations along the centre line of the coil currents are assessed through detailed step-by-step non-linear finite element (FE) simulation of the assembly procedure of the complete torus. The model is evaluated against measured displacements and reaction forces monitored during consequent assembly steps. The results are being used to quantify the obtained field asymmetry and countermeasures to minimize it. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：2189 / 2193

页数：5

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