Chung J, Ko J, Wi H, Messmer M, Schenkelaars S, Scheffer M, Jaspers R J E
National Fusion Research Institute, Yuseong, Daejeon 305-333, South Korea.
Eindhoven University of Technology, 5612 AZ Eindhoven, The Netherlands.
Rev Sci Instrum. 2016 Nov;87(11):11E503. doi: 10.1063/1.4955483.
A photo-elastic modulator based 25-chord motional Stark effect (MSE) diagnostic has been successfully developed and commissioned in Korea Superconducting Tokamak Advanced Research. The diagnostic measures the radial magnetic pitch angle profile of the Stark splitting of a D-alpha line at 656.1 nm by the electric field associated with the neutral deuterium heating beam. A tangential view of the neutral beam provides a good spatial resolution of 1-3 cm for covering the major radius from 1.74 m to 2.28 m, and the time resolution is achieved at 10 ms. An in-vessel calibration before the vacuum closing as well as an in situ calibration during the tokamak operation was performed by means of specially designed polarized lighting sources. In this work, we present the final design of the installed MSE diagnostic and the first results of the commissioning.
一种基于光弹性调制器的25弦运动斯塔克效应（MSE）诊断仪已在韩国超导托卡马克先进研究装置上成功研制并投入使用。该诊断仪通过与中性氘加热束相关的电场来测量656.1 nm处D-α线斯塔克分裂的径向磁俯仰角分布。中性束的切向视图提供了1-3 cm的良好空间分辨率，可覆盖从1.74 m到2.28 m的大半径范围，时间分辨率达到10 ms。在真空封闭前进行了容器内校准，并在托卡马克运行期间通过专门设计的偏振光源进行了原位校准。在这项工作中，我们展示了已安装的MSE诊断仪的最终设计以及调试的初步结果。
