LAUSR

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.