强激光与粒子束Issue(10)：185-190,6.DOI:10.11884/HPLPB201426.102005
小焦斑纳秒激光烧蚀铝平面靶的数值研究
Simulation of expansion of aluminum plasmas produced by a small focal spot nanosecond laser irradiation
摘要
Abstract
With the help of radiation hydrodynamic code Flash,we simulated the ablation process of a small focal-spot nano-second laser irradiation on an aluminum planar target.The irradiating laser has a focal spot radius of 25μm and maximum intensi-ty of about 1013 W/cm2 with wavelength of 532 nm.In our simulations,it is observed that electron density in the laser channel is relatively lower than the ambient one in some coronal region.This phenomenon is found to be sensitive to the electron heat con-duction model.By comparing simulation results with our experimental electron density profiles,flux limit factor of 0.08 is then determined in our simulation.The annular j et also occurs in our simulations and experiments.The mechanism of annular j et for-mation is analyzed and discussed,which is mainly related to the radiative cooling.关键词
辐射流体程序 Flash/激光烧蚀/辐射冷却/电子热输运/环状射流Key words
radiation hydrodynamic code Flash/laser ablation/radiation transport/electron heat transport/annular j et分类
数理科学引用本文复制引用
龙城德,赵斌,袁鹏,胡广月,郑坚..小焦斑纳秒激光烧蚀铝平面靶的数值研究[J].强激光与粒子束,2014,(10):185-190,6.基金项目
国家自然科学基金项目(10625523,11005112,11175179) （10625523,11005112,11175179）
教育部创新团队发展计划资助项目(ITR1190) （ITR1190）
