Abstract
As a kind of important nonlinear optical element, KDP crystal has great demand in the inertial confinement fusion system. Based on the dissolution mechanism of solid materials, the factors that affect the material removal rate of KDP crystal in magnetorheological (MR) water-dissolution polishing are investigated to improve the machining efficiency. It is found that the material removal rate is proportional to the product of the saturation concentration and diffusion coefficient, and the relationship between the removal efficiency and the temperature meets the unilateral Gaussian function. Polishing experiments are carried out on a magnetorheological finishing (MRF) machine with self-designed MRF fluid heating devices. The experimental results show that practical efficiency—temperature curve is consistent with the theoretical curve, and the maximum machining efficiency increases by about 50% with the rise of temperature from 294 to 302 K. Meanwhile, when the MR fluid temperature is lower than 308 K, the crystal surface quality and surface roughness in different processing temperatures have no remarkable difference with constant crystal temperature (294 K). This research indicates that it is feasible to drastically improve KDP crystal MRF efficiency by controlling the processing temperature.
© 2016 Optical Society of America
Full Article | PDF ArticleMore Like This
Shaoshan Chen, Shengyi Li, Xiaoqiang Peng, Hao Hu, and Guipeng Tie
Appl. Opt. 54(6) 1478-1484 (2015)
Shaoshan Chen, Shengyi Li, Hao Hu, Qi Li, and Guipeng Tie
Appl. Opt. 53(31) 7215-7223 (2014)
Shaoshan Chen, Deyu He, Yi Wu, Huangfei Chen, Zaijing Zhang, and Yunlei Chen
Appl. Opt. 55(28) 8056-8062 (2016)