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arXiv 2211.03360physics.plasm-ph
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NIO1的首次氢操作:通过光学发射光谱诊断表征源等离子体

First hydrogen operation of NIO1: characterization of the source plasma by means of an optical emission spectroscopy diagnostic

M. Barbisan, C. Baltador, B. Zaniol, M. Cavenago, U. Fantz, R. Pasqualotto, G. Serianni, L. Vialetto, D. Wünderlich

摘要:

NIO 1是一种紧凑灵活的射频H离子源,由Consorzio RFX和INFN-LNL开发。NIO 1实验的目的是优化负离子的产生及其提取和束流光学。在其调试的初始阶段,NIO 1使用氮气运行,但现在该源也定期使用氢气运行。为了评估源的性能,安装了光学发射光谱诊断。该系统包括一个光谱范围为300-850 nm的低分辨率光谱仪和一个高分辨率(50 pm)光谱仪,分别研究可见光范围内的原子和分子发射。的光谱数据也已被解释的装置在IPP Garching开发的碰撞辐射模型。除了诊断硬件和数据分析方法,本文提出了第一个等离子体测量跨越过渡到全H模式,在氢放电。描述了等离子体参数中的这种转变的特征签名,特别是从等离子体发射的光在一定功率阈值以上的突然增加。

英文摘要:

NIO1 is a compact and flexible radiofrequency H- ion source, developed by Consorzio RFX and INFN-LNL. Aim of the experimentation on NIO1 is the optimization of both the production of negative ions and their extraction and beam optics. In the initial phase of its commissioning, NIO1 was operated with nitrogen, but now the source is regularly operated also with hydrogen. To evaluate the source performances an optical emission spectroscopy diagnostic was installed. The system includes a low resolution spectrometer in the spectral range of 300-850 nm and a high resolution (50 pm) one, to study respectively the atomic and the molecular emissions in the visible range. The spectroscopic data have been interpreted also by means of a collisional-radiative model developed at IPP Garching. Besides the diagnostic hardware and the data analysis methods, the paper presents the first plasma measurements across a transition to the full H mode, in a hydrogen discharge. The characteristic signatures of this transition in the plasma parameters are described, in particular the sudden increase of the light emitted from the plasma above a certain power threshold.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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