Abstract Locating optical fibers in collection optics and confirmations of target scattering positions are critical to achieve accurate measurement for Thomson scattering diagnostic. Because the port size is limited on EAST, such procedures are difficult to be developed for horizontal Thomson scattering diagnostic. In order to solve this problem, a set of novel locating system has been designed and installed recently. The locating system includes an optical target baffle and its electric control system. The resolution of the system is 0.1mm. By using the locating system, optical fibers can be located effectively according to the aligned beam path, and based on the locating system, a method for locating the major radii of all detected positions is proposed. The resolution using the method to locate the major radius is 0.6mm. The major radii obtained by the method are compared with those obtained by portable ARM measurement system and the result indicates that they are consistent well.

中文翻译：

---

EAST水平汤姆逊散射诊断定位系统设计

摘要 在收集光学器件中定位光纤并确认目标散射位置对于实现汤姆逊散射诊断的准确测量至关重要。由于 EAST 上的端口尺寸有限，因此难以为水平汤姆森散射诊断开发此类程序。为了解决这个问题，最近设计并安装了一套新颖的定位系统。定位系统包括光学目标挡板及其电控系统。系统分辨率为0.1mm。通过使用该定位系统，可以根据对准的光路有效地定位光纤，并基于该定位系统，提出了一种定位所有检测位置的主半径的方法。使用该方法定位大半径的分辨率为0.6mm。