Engineering Challenges of W7-X: Improvement of Numerical Modeling and Mechanical Monitoring After Commissioning and First Phase of Operation

被引：6
|
作者：
Bykov, V. [1 ]
Zhu, J. [1 ]
Carls, A. [1 ]
Fellinger, J. [1 ]
van Eeten, P. [1 ]
Bosch, H. -S. [1 ]
Wegener, L. [1 ]
机构：
[1] Max Planck Inst Plasma Phys, D-17491 Greifswald, Germany
来源：
FUSION SCIENCE AND TECHNOLOGY | 2017年 / 72卷 / 04期
关键词：
Wendelstein 7-X (W7-X); stellarator; numerical modeling; finite element; benchmarking; commissioning; operation; WENDELSTEIN; 7-X; SYSTEM;
D O I：
10.1080/15361055.2017.1352427
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 largest modular stellarator Wendelstein 7-X (W7-X) has successfully passed commissioning and first phase of operation in Greifswald, Germany. The limiter configurations of plasma with 2.5 T of magnetic induction on the plasma axis produce already considerable loads (MN) in the W7-X systems. The sophisticated W7-X superconducting magnet system with its non-linear support system is instrumented with an extensive set of mechanical and temperature sensors. Measurement results showed that magnet system behavior is in good correspondence with original predictions from numerical models. However, several areas require modeling improvements and/or proper adjustment of parameters to reflect "as-built" situation. Moreover, high temperature dependence of strain gauge signal accuracy in the range below 10 K requires its compensation in order to avoid fault alarms during monitoring. The work is considered as benchmarking of numerical models and as a preparation for upcoming more demanding phases with longer plasma pulses to guarantee safe and reliable W7-X operation with different divertor configurations. Both results of W7-X measurements and implemented improvements as well as lessons learned so far are also given.
引用
收藏
页码：546 / 558
页数：13
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