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Commissioning and initial operation of the W7-X neutral beam injection heating system
Fusion Engineering and Design ( IF 1.7 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.fusengdes.2020.111997 P. McNeely , S. Äkäslompolo , W. Auerweck , Y. Drider , O.P. Ford , D.A. Hartmann , B. Heinemann , S. Heinrich , C. Hopf , R. Kairys , S. Obermayer , R. Riedl , P. Rong , N. Rust , R. Schroeder , R.C. Wolf
Fusion Engineering and Design ( IF 1.7 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.fusengdes.2020.111997 P. McNeely , S. Äkäslompolo , W. Auerweck , Y. Drider , O.P. Ford , D.A. Hartmann , B. Heinemann , S. Heinrich , C. Hopf , R. Kairys , S. Obermayer , R. Riedl , P. Rong , N. Rust , R. Schroeder , R.C. Wolf
Abstract The first, of two planned, neutral beam injectors for the stellarator Wendelstein 7-X (W7-X) was commissioned for and participated in the experimental campaign (OP1.2b) from July to October 2018. The injector was equipped with two RF driven ion sources from which 90A of positive hydrogen ions were extracted at 55 kV. After neutralization, the two sources provided >3 MW of neutral beam heating power to the stellarator plasma. During the experimental campaign >300 shots were successfully performed for plasma heating or to allow for measurement of the ion temperature profile by charge exchange recombination spectroscopy (CXRS). The initial operation of the NBI system on W7-X was very successful, demonstrating both increased central plasma density and stored plasma energy, or allowing for the collection of the time resolved ion temperature over the bulk of the plasma. This paper presents, briefly, source conditioning and performance, focusing on some of the initial problems encountered. Described in more detail is the most significant challenge overcome during commissioning: failure to couple RF power into one of the sources.
中文翻译:
W7-X 中性束喷射加热系统的调试和初始运行
摘要 2018 年 7 月至 10 月,仿星器 Wendelstein 7-X (W7-X) 的两个计划中性射束注入器中的第一个投入使用并参与了实验活动 (OP1.2b)。注入器配备了两个 RF在 55 kV 下提取 90A 正氢离子的驱动离子源。中和后,这两个源为仿星器等离子体提供了 >3 MW 的中性束加热功率。在实验活动期间,成功进行了 300 次以上的发射以用于等离子体加热或允许通过电荷交换复合光谱 (CXRS) 测量离子温度分布。NBI 系统在 W7-X 上的初始运行非常成功,证明了中心等离子体密度和储存等离子体能量的增加,或允许在大部分等离子体上收集时间分辨离子温度。本文简要介绍了源调节和性能,重点介绍了最初遇到的一些问题。更详细地描述了调试期间克服的最重大挑战:未能将射频功率耦合到其中一个源中。
更新日期:2020-12-01
中文翻译:
W7-X 中性束喷射加热系统的调试和初始运行
摘要 2018 年 7 月至 10 月,仿星器 Wendelstein 7-X (W7-X) 的两个计划中性射束注入器中的第一个投入使用并参与了实验活动 (OP1.2b)。注入器配备了两个 RF在 55 kV 下提取 90A 正氢离子的驱动离子源。中和后,这两个源为仿星器等离子体提供了 >3 MW 的中性束加热功率。在实验活动期间,成功进行了 300 次以上的发射以用于等离子体加热或允许通过电荷交换复合光谱 (CXRS) 测量离子温度分布。NBI 系统在 W7-X 上的初始运行非常成功,证明了中心等离子体密度和储存等离子体能量的增加,或允许在大部分等离子体上收集时间分辨离子温度。本文简要介绍了源调节和性能,重点介绍了最初遇到的一些问题。更详细地描述了调试期间克服的最重大挑战:未能将射频功率耦合到其中一个源中。