为使神光Ⅲ主机装置的打靶精度达到30 μm，本文以稳定性指标为前提设计了该装置的靶场编组站，并对编组站刚架和传输反射镜组件进行了优化。采用钢筋混凝土结构支撑编组站刚架，在编组站刚架主框架内增加斜撑，以减小并合理分布编组站刚架的质量载荷，同时对局部的横梁增加人字形斜撑。设计了反射镜架且使其基频远高于编组站刚架基频以抑制编组站反射镜在随机宽频振动激励下的角度漂移。对靶场结构有限元(FEA)模型的力学分析表明，编组站中87％的传输反射镜的角度漂移低于0.48 μrad，根据靶场系统中各元件漂移对光路定位误差的影响公式进行分析，结果显示编组站反射镜角度漂移可以满足靶场各单条光路定位误差不超过12.9 μm的稳定性指标，证明所设计的神光III主机装置编组站可以满足相应的稳定性要求。

To assure the pointing accuracy in a shooting target to be better than 30 μm for the Shen Guang Ⅲ(SGⅢ)facility,the switchyard of target area for the facility was designed and the rigid frame and transport mirrors in the switchyard were optimized to improve their stability. In design, the reinforced concrete was used to support the switchyard, and the tilted supports were added in the steel frame of switchyard to decrease and distribute the mass load reasonably.Furthermore, the herringbone supports were firmed to local horizontal beams. The transport mirror supports were also designed, in which their foundational frequencies were much higher than that of the swichyard. By above ways, the angle shifts of transmission mirrors in random broadband vibration can be suppressed successfully. The mechanical analysis of range structure by Finite Element Analysis(FEA) indicates that 87% of transport mirrors show their angle shifts less than 0.48 μrad. According to the relation between the rotation drifts of the optics components and the positioning errors of optical path, it can be seen that the rotation drifts of the transmission mirrors could meet the stability requirements for the positioning error of each single optical path not more than 12.9 μm.