One of the essential calibration procedures for the motional Stark effect (MSE) diagnostic system includes obtaining the mapping responses of the angle evaluated from the demodulation of the photoelastic-modulated raw signals in the MSE polarimeter to the incident polarized light either parallel or perpendicular to the Lorentz electric field originated from a flux surface of a tokamak plasma. This in-vessel mapping calibration procedure that is practically very time-consuming and tedious has been improved by a newly developed MSE in-vessel calibration system with the capability of remote and automatic operations for the Korea Superconducting Tokamak Advanced Research (KSTAR) tokamak. The key design has employed the concept that the polarization state is preserved along an observation line of sight once the polarizer surface, or the wave front of the polarized light, is perpendicular to the line of sight. Comparisons with previous manual calibration procedures confirm this concept is applicable practically. The new remote and automatic calibration activities performed with this new system yield unprecedented angular coverage and resolution in the mapping curves between the incident polarization angles and measured angles. The performance of the new calibration mechanism, free from various time constraints related to scheduling tokamak maintenance period, is virtually limited only by the precision of the motorized rotational stage that mounts the polarized light source on it, which is less than a hundredth of a degree.

中文翻译：

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开发用于 KSTAR 动斯塔克效应诊断的远程自动容器内校准系统

动斯塔克效应 (MSE) 诊断系统的基本校准程序之一包括获得从 MSE 旋光计中的光弹性调制原始信号解调到平行或垂直于入射偏振光的入射偏振光所评估的角度的映射响应。洛伦兹电场源自托卡马克等离子体的通量表面。这种实际上非常耗时且繁琐的船内测绘校准程序已通过新开发的 MSE 船内校准系统得到改进，该系统具有韩国超导托卡马克高级研究 (KSTAR) 托卡马克的远程和自动操作能力。关键设计采用了这样的概念：一旦偏振器表面或偏振光的波前垂直于视线，偏振状态就会沿着观察视线保留。与以前的手动校准程序的比较证实了这个概念在实际中是适用的。使用该新系统执行的新远程自动校准活动在入射偏振角和测量角度之间的映射曲线中产生了前所未有的角度覆盖范围和分辨率。新校准机构的性能不受与安排托卡马克维护周期相关的各种时间限制，实际上仅受到安装偏振光源的电动旋转台精度的限制，该精度小于百分之一度。