电器与能效管理技术Issue(21)：5-9,38,6.DOI:10.16628/j.cnki.2095-8188.2016.21.002
纳秒脉冲激光烧蚀石墨电极的一维数值仿真
One-Dimension Numerical Simulation of Pulse Laser Ablated Graphite Electrode
摘要
Abstract
Based on the heat conduction equation,a one-dimension numerical model of pulse laser ablation solid target was constructed.This model considering the plasma shield effect was used to calculate the graphite ablation undergoing the incident laser in the form of Gaussian distribution with peak value 1012 W/m2.The results indicate that the temperature of graphite declines by exponent with the depth increase,and the surface temperature will improve due to the laser irradiation increase.The max surface temperature 9 000 K is obtained at the peak laser irradiation.The higher surface temperature promotes the higher evaporation rate,which has the max value 26 m/s at 20 ns.Meanwhile,it results in the ablation depth greatly,it is about 350 nm.Higher evaporation rate generates a large number of plasmas,which leads to the produced plasma absorb much laser energy,the ratio of the absorption energy to the incident laser energy is about 0.3.关键词
激光烧蚀/一维数值仿真/表面温度/等离子屏蔽Key words
laser ablation/one-dimension numerical simulation/surface temperature/plasma shield分类
信息技术与安全科学引用本文复制引用
董勤晓,杨泽峰,刘之方,吴坚,李兴文..纳秒脉冲激光烧蚀石墨电极的一维数值仿真[J].电器与能效管理技术,2016,(21):5-9,38,6.基金项目
陕西省自然科学基础研究计划资助项目(2016JQ5001) （2016JQ5001）
