Ko Won-Ha, Lee Hyungho, Seo Dongcheol, Kwon Myeun
National Fusion Research Institute, Gwahangno 113, Daejeon 305-333, Korea.
Rev Sci Instrum. 2010 Oct;81(10):10D740. doi: 10.1063/1.3496991.
The charge exchange spectroscopy (CES) system including collection assemblies, lens design, and cassettes for the KSTAR experiment was installed to obtain profiles of the ion temperature and the toroidal rotation velocity from charge exchange emission between plasma ions and beam neutrals near the plasma axis by using a modulated neutral beam and a background system. We can measure the charge exchange spectra of an impurity line such as the 529 nm line of carbon VI to get ion temperature and rotation profiles in KSTAR. The CES and background systems will have absolute intensity and spectral calibrations using a calibrated source and various spectral lamps. The calibration was done inside the tokamak after all CES systems are installed and the optical systems are slid into the cassettes. This requires that the diagnostic systems are installed near the vacuum vessel inside the cryostat maintaining the superconducting state of the superconducting coils. Repeated spectral calibrations of the spectrometer and charge coupled device for CES will be made in the diagnostic room during the experimental campaign. We show a detailed description of the KSTAR CES system, how to calibrate, and the results of calibration.
为了通过使用调制中性束和背景系统，从等离子体轴附近的等离子体离子与束中性粒子之间的电荷交换发射中获取离子温度和环向旋转速度的分布，安装了包括收集组件、透镜设计以及用于韩国超导托卡马克先进研究装置（KSTAR）实验的盒式装置在内的电荷交换光谱（CES）系统。我们可以测量诸如碳VI的529纳米谱线等杂质线的电荷交换光谱，以获取KSTAR中的离子温度和旋转分布。CES和背景系统将使用校准源和各种光谱灯进行绝对强度和光谱校准。校准是在所有CES系统安装完毕且光学系统滑入盒式装置后，在托卡马克内部进行的。这要求诊断系统安装在低温恒温器内部靠近真空容器的位置，以维持超导线圈的超导状态。在实验期间，将在诊断室对CES的光谱仪和电荷耦合器件进行重复的光谱校准。我们展示了KSTAR CES系统的详细描述、校准方法以及校准结果。
