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Performance and properties of the first plasmas of Wendelstein 7-X

机译：Wendelstein 7-X的第一个等离子体的性能和属性

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摘要

The optimized, superconducting stellarator Wendelstein 7-X went into operation and delivered first measurement data after 15 years of construction and one year commissioning. Errors in the magnet assembly were confirmend to be small. Plasma operation was started with 5 MW electron cyclotron resonance heating (ECRH) power and five inboard limiters. Core plasma values of T-e > 8 keV, T-i > 2 keV at line-integrated densities n approximate to 3 . 10(19) . m(-2) were achieved, exceeding the original expectations by about a factor of two. Indications for a core-electron-root were found. The energy confinement times are in line with the international stellarator scaling, despite unfavourable wall conditions, i.e. large areas of metal surfaces and particle sources from the limiter close to the plasma volume. Well controlled shorter hydrogen discharges at higher power (4 MW ECRH power for 1 s) and longer discharges at lower power (0.7 MW ECRH power for 6 s) could be routinely established after proper wall conditioning. The fairly large set of diagnostic systems running in the end of the 10 weeks operation campaign provided first insights into expected and unexpected physics of optimized stellarators.
机译：优化的超导恒液仪Wendelstein 7-X进入运行，并在15年的建设和一年调试后提供了第一次测量数据。磁铁组件中的错误确认为小。使用5 MW电子回旋共振加热（ECRH）功率和五个内侧限制器开始等离子体操作。 T-E> 8 keV，T-1的核心等离子体值，线综合密度n近似为3。 10（19）。达到M（2），超过原始期望大约两倍。发现了核心核心根的适应症。尽管不利的墙壁条件，但能量限制时间符合国际螺栓缩放，即，从限制器接近等离子体体积的限制器的大区域和粒子源的大面积。在适当的墙壁调理后，良好地控制较高功率（4 MW ECRH电源的4 MW ECRH电源）和较低功率的放电（6 S为0.7MW ECRH电源）。在10周的10周的末尾运行的相当大的诊断系统提供了首先洞察的最佳优化颗粒器的预期和意外物理学。

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