“神光-Ⅱ”第九路终端光学系统稳定性分析

 在“神光-Ⅱ”装置上进行先进高能多功能激光束系统(简称第九路)研制工程中，由于在原ICF靶室上又增加了输入“汤姆逊探针光”和“X光背光照明探针光”的锥形真空套筒及其终端光学元件，导致原有靶室结构的变化，可能会引入新的不稳定因素。通过有限元分析方法，建立有限元分析模型，进行优化设计。通过位移传感器测量结果可知，第九路终端光学元件径向窜动所引起的打靶误差最大值为2.110 μm，小于“神光-Ⅱ”靶场终端光学系统的最大允许误差值7.785 μm。

Stability analysis for final optical system of the additional beam of "Shengguang-Ⅱ" laser facility

During the development of the additional beam system of “Shengguang-Ⅱ” facility, two vacuum cones and inner final optical systems would be fabricated on the ICF target chamber in order to offer Thompson probe and X-ray probe, which would influence the stability of the chamber. The FEM (Finite Element Model) analysis was used in design of the target chamber in order to optimize the mechanical design of the vacuum cone and the final optical system. From the measurement results by the displacement-sensor, the target position error being 2.110 μm caused by radial vibration of the addition beam final optical elements is obtained.