论文标题
部分可观测时空混沌系统的无模型预测
First Beam Characterization by Means of Emission Spectroscopy in the NIO1 Experiment
论文作者
论文摘要
NiO1实验构成了由INFN-LNL和Consorzio RFX开发的灵活的RF H离子源，以改善当前的负离子的生产和加速概念。该源还用于基准专用于ITER中性梁测试设施的仪器。 NiO1中安装了许多诊断，以表征源和提取的负离子光束。其中，梁发射光谱（BES）已在NiO1中使用，以测量梁的差异和均匀性，以及在加速度系统内被中和的束离子的比例。诊断方法基于对多普勒的分析移动了$H_α$光子由快速束颗粒发出并沿视线收集的。本文介绍了BES诊断的实验设置和分析算法，并讨论了第一个测量以及它们与操作参数的相关性。
The NIO1 experiment hosts a flexible RF H- ion source, developed by INFN-LNL and Consorzio RFX to improve the present concepts for the production and acceleration of negative ions. The source is also used to benchmark the instrumentation dedicated to the ITER neutral beam test facility. Many diagnostics are installed in NIO1 to characterize the source and the extracted negative ion beam. Among them, Beam Emission Spectroscopy (BES) has been used in NIO1 to measure the divergence and the uniformity of the beam, together with the fraction of beam ions which was neutralized inside the acceleration system. The diagnostic method is based on the analysis of the Doppler shifted $H_α$ photons emitted by the fast beam particles and collected along a line of sight. The article presents the experimental setup and the analysis algorithms of the BES diagnostic, together with a discussion of the first measurements and of their correlation with the operational parameters.
