ICF装置光束定位的结构稳定性设计

发布时间：2018-04-26 16:51

本文选题：激光驱动ICF装置 + 光束定位　；参考：《红外与激光工程》2017年11期

【摘要】：激光驱动ICF装置的甚多束激光在打靶过程中需要高精度定位于靶面,这就要求可以改变光束着靶点位置的光学元件满足定位误差指标要求。首先介绍光束定位误差分解方法,在光束对准过程中和打靶前,在多源激励作用下能改变光束着靶点位置的光学元件需要评估其支撑系统的稳定性设计,发展了光学元件稳定性指标分解方法用于其支撑系统的稳定性评估。从基频、环境随机振动、模态阻尼的角度讨论了支撑系统振动稳定性设计思路。光学元件的通用支撑系统采用大而重的钢筋混凝土和钢结构的混合结构,钢筋混凝土保证光学元件稳定性的同时,钢结构提供结构设计的灵活性。采用有限元技术分析光学元件在宽频环境随机振动作用下的响应,评估支撑系统的振动稳定性设计。描述了神光III宽频环境随机振动和光束定位误差的测量,测量结果表明神光III支撑系统满足设计要求,该技术能应用于激光驱动ICF装置支撑系统的设计。
[Abstract]:The multi beam laser driven by the laser driven ICF device needs high precision to locate the target in the shooting process. This requires the optical element that can change the position of the target point to meet the requirement of the positioning error. Firstly, the method of the beam positioning error decomposition is introduced. The beam can change the beam under the multi source excitation in the process of the beam alignment and the target. The optical element at the position of the target needs to evaluate the stability design of the supporting system. The stability index decomposition method of the optical element stability is developed to evaluate the stability of the support system. The design idea of the vibration stability of the support system is discussed from the angle of the fundamental frequency, the random vibration of the environment and the modal damping. With the mixed structure of large and heavy reinforced concrete and steel structure, the reinforced concrete ensures the stability of optical elements, while the steel structure provides the flexibility of structural design. The finite element method is used to analyze the response of optical elements under the random vibration of the broadband environment, to evaluate the vibration stability design of the support system, and to describe the III width of the Shen Guang. The measurement results of random vibration and beam positioning error show that the III support system of the divine light meets the design requirements. This technique can be applied to the design of the support system of the laser driven ICF device.

【作者单位】：中国工程物理研究院总体工程研究所;
【基金】：国家高技术研究发展计划(2007AA804217)
【分类号】：TH744.5

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