论文标题
NIO1的第一个氢气操作：通过光学发射光谱诊断来表征源血浆
First hydrogen operation of NIO1: characterization of the source plasma by means of an optical emission spectroscopy diagnostic
论文作者
论文摘要
NiO1是由Consorzio RFX和INFN-LNL开发的紧凑而柔性的射频H-ION源。在NiO1上实验的目的是优化负离子的产生及其提取和光束光学元件。在调试的初始阶段，NiO1用氮气操作，但现在来源也定期使用氢操作。为了评估源表现，安装了光学发射光谱诊断。该系统包括在300-850 nm和高分辨率（50 pm）的光谱范围内的低分辨率光谱仪，分别研究可见范围内的原子和分子排放。光谱数据也通过在IPP Garching开发的碰撞辐射模型来解释。除了诊断硬件和数据分析方法外，本文还介绍了在氢排放中过渡到完整H模式的第一个血浆测量。描述了血浆参数中此过渡的特征特征，特别是从一定功率阈值以上的血浆发出的光突然增加。
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.
