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采用输出能量为10 J、脉宽为10 ns、重复频率为10 Hz的Nd:YAG激光器,根据美国NIF、法国LMJ和俄罗斯LUTCH装置的铂金颗粒检测参数,建立了大口径钕玻璃铂金颗粒扫描平台。在此平台上,测试并研究了N31大口径钕玻璃内部的铂金颗粒夹杂物在强激光辐照下的破坏情况。高分辨率光学体视显微镜对铂金颗粒夹杂物破坏后的形貌进行了观测和讨论。初步研究表明,在正常生产工艺条件下生产出的钕玻璃,其内部不存在铂金颗粒夹杂物。当去除铂金的工艺出现异常时,在钕玻璃内部是有可能出现铂金颗粒夹杂物颗粒的。所建立的扫描参数能够将不可见的微颗粒有效地检测出来,从而及时准确反馈除铂金的工艺条件,确保钕玻璃生产的正常进行。
The Nd: YAG laser with 10 J pulse width, 10 ns pulse width and 10 Hz repetition rate was used to detect the platinum particles in the large diameter neodymium glass Platinum Particle Scanning Platform based on the detection parameters of platinum particles in NIF of USA, LMJ of France and LUTCH of Russia. . On this platform, the damage of platinum particles in N31 large-diameter neodymium glass under intense laser irradiation was tested and studied. High resolution optical stereo microscope was used to observe and discuss the morphologies of the inclusions after the platinum particles were destroyed. Preliminary studies have shown that neodymium glass produced under normal production conditions does not contain platinum particles in its interior. When the process of removing the platinum is abnormal, there is a possibility that platinum particles are contained inside the neodymium glass. The established scanning parameters can effectively detect the invisible microparticles so as to timely and accurately return the process conditions except platinum to ensure the normal production of neodymium glass.