Abstract A bi-directional multi-channel retarding field analyzer (RFA) probe has been successfully developed for the first time on the Wendelstein 7-X (W7-X) stellarator boundary plasma. Modifications to the RFA prototype hardware and its upgrade for the two W7-X island divertor campaigns are presented, including the electronics. In this paper the experiences and challenges operation and customizing an RFA at W7-X are discussed, as well as the data analysis using a maximum coefficient of determination method to obtain the ion temperature based on the measured modulated ion current. Edge ion temperature profiles have been measured in the standard and high iota configurations.

中文翻译：

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wendelstein 7-X 边界等离子体的延迟场分析仪

摘要 首次在Wendelstein 7-X（W7-X）仿星体边界等离子体上成功研制了双向多道阻滞场分析仪（RFA）探头。介绍了 RFA 原型硬件的修改及其为两个 W7-X 岛偏滤器活动进行的升级，包括电子设备。在本文中，讨论了在 W7-X 上操作和定制 RFA 的经验和挑战，以及使用最大确定系数方法进行数据分析，以根据测量的调制离子电流获得离子温度。边缘离子温度分布在标准和高 iota 配置中进行了测量。