CAJ | 학술논문

给出了神光Ⅲ原型装置主放大器系统的热畸变模型，该模型包括三个模块：热传输模块、热弹性力学模块、光学模块。利用该模型对原型装置的剩余热波前畸变进行了研究。初步结果表明，通过优化的冷却方案，可以在装置预定的运行周期内将激光工作介质内的温度梯度和总体平均温度冷却到可以接受的水平，剩余热波前畸变满足设计要求。利用该模型还定量地研究了增益介质的热膨胀系数与剩余热畸变之间的关系。
급출료신광Ⅲ원형장치주방대기계통적열기변모형，해모형포괄삼개모괴：열전수모괴、열탄성역학모괴、광학모괴。이용해모형대원형장치적잉여열파전기변진행료연구。초보결과표명，통과우화적냉각방안，가이재장치예정적운행주기내장격광공작개질내적온도제도화총체평균온도냉각도가이접수적수평，잉여열파전기변만족설계요구。이용해모형환정량지연구료증익개질적열팽창계수여잉여열기변지간적관계。
A thermo-elasto-optical distortion model for the main amplifier of SG-Ⅲ prototype is presented in this paper, which consists of three modules, i.e., modules of heat transfer, thermo-elastics and optics. With this model, the residual thermal distortion of the main amplifier of SG-Ⅲ prototype is investigated. The calculating results indicate that, with an optimization thermal recovery, the thermal gradient and the average temperature of the slab can be reduced to an acceptable value. The residual thermo-optical distortions can meet the design requirements. Additionally, a quantitative relation between the thermal distortion and the linear thermal expansion coefficient of the laser gain medium have been also obtained.