Radial electric field and plasma confinement

温德尔斯坦VIIAS是德国马克斯·普朗克物理研究所的一种螺旋装置。该装置具有中性束，束流能量为50keV，是电荷交换光谱的理想光源，电荷交换线的发射足够大，可以用于测量。1999财年，我们购买了80x80像素冷却的CCD相机作为电荷交换光谱的高时间分辨率探测器。在2000财年，我们购买了法布里-珀罗涉仪并对其进行了测试。法布里-珀罗涉仪是一种利用光的干涉来传输给定波长的光的系统，通过保持两个反射镜彼此平行以非常高的精度。因此，系统的光轴必须精确对准。设计了与Wendelstein VII AS集团的光纤束相匹配的光学工作台。2001财年，将CCD相机、法布里-珀罗涉仪、光纤束组装到光学工作台上，并将Fabry-Perot光谱系统运往德国Max-Planck研究所并安装到Wendelstein VII AS上。测量所需的对准和校准已在实验前完成。在2002财年，使用该法布里-珀罗光谱分析系统对温德尔斯坦VIFAS中的离子温度和径向电场进行了高时间分辨率的测量。2003财年，由于温德尔斯坦VIIAS被关闭，系统被转移并安装到Max-Planck研究所的ASDEX升级设备上，系统的对准工作完成。在2004财政年度，测量了L模向H模转变过程中径向电场的变化。

Wendelstein VIIAS is a helical device in Max-Planck Physics Institute in Germany. This device has neutral beam with a beam energy of 50keV, which is ideal for the charge exchange spectroscopy and emission of charge exchange line is expected to be large enough for the measurements.In the fiscal year 1999, we purchased 80x80 pixel cooled CCD camera as a detector with high time resolution for the charge exchange spectroscopy. In the fiscal year 2000, we purchased Fabry-Perot Interferometer and tested it. The Fabry-Perot Interferometer is a system to transmit the light with a given wavelength using interference of light by keeping the two mirrors parallel to each other with very high accuracy. Therefore the optical axis of the system should be accurately aligned. The optical stage to match the optical fiber bundle from Wendelstein VII AS group was designed.In the fiscal year 2001, The CCD camera, Fabry-Perot interferometer, optical fiber bundle are assembled to the optical stage and the Fabry-Perot spectroscopy system was shipped to Max-Planck Institute in Germany and installed to the Wendelstein VII AS. The alignment and calibration required for the measurements have been done before the experiments. In the fiscal year 2002, ion temperature and radial electric filed were measured with high time resolution in Wendelstein VIFAS using this Fabry-Perot spectroscopy system.In the fiscal year 2003, because the Wendelstein VIIAS was shutdown, the system was transferred and installed to the ASDEX upgrade device in the Max-Planck Institute and the alignment of the system was completed. hi the fiscal year 2004, the change of radial electric filed was at the transition L-mode to H-mode transition was measured.