脉冲激光辐照靶材破坏效果最优条件研究
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摘要
为解析脉冲激光对靶材的破坏效果与激光各参数之间的关系,提出了一种基于数值计算方法的仿真模拟方案,开发了一套脉冲激光辐照靶材的热-力效应数值仿真软件。采用对照法,分别对激光功率、激光能量、激光光斑大小、脉冲宽度和间歇时间等五个参量进行控制,对比不同参数条件下激光破坏靶材的效果,讨论并得出了优化脉冲激光破坏靶材的方法。仿真结果表明,激光能量和功率密度与破坏效果之间是非线性关系,随着二者的增加,对破坏效果的边际加强效果减弱;随着间歇时间的增加,破坏效果先增大后减小。对于确定的靶体目标,通过增加脉冲激光的输出能量和功率密度,减小光斑半径,调整脉冲间歇时间,可以使得脉冲激光辐照靶材的破坏效果达到最佳。
In order to analyze the relationship between the effect on the target and the parameters of the pulsed laser,a simulation scheme based on numerical calculation method is proposed in this paper. Furthermore,a set of numerical simulation software for thermal force effect of laser irradiated target is developed. The laser power,laser energy,laser spot size,pulse width and interval time are controlled respectively by using contrast method. The effect of laser damage on the target under different parameters is compared,and the optimum conditions for the damage of the target by the pulse laser are discussed and obtained.As shown by the simulation results,there is a nonlinear relationship between the laser energy and the power density and the damage effect. The marginal enhancement of the damage effect is weakened as they increase. With the increase of the interval time,the damage effect increases first and then decreases. The destructive effect of the laser irradiated target can be reached to the best by increasing the output energy and power density,reducing the radius of laser spot and selecting reasonable pulse interval time within the limits allowed.
In order to analyze the relationship between the effect on the target and the parameters of the pulsed laser,a simulation scheme based on numerical calculation method is proposed in this paper. Furthermore,a set of numerical simulation software for thermal force effect of laser irradiated target is developed. The laser power,laser energy,laser spot size,pulse width and interval time are controlled respectively by using contrast method. The effect of laser damage on the target under different parameters is compared,and the optimum conditions for the damage of the target by the pulse laser are discussed and obtained.As shown by the simulation results,there is a nonlinear relationship between the laser energy and the power density and the damage effect. The marginal enhancement of the damage effect is weakened as they increase. With the increase of the interval time,the damage effect increases first and then decreases. The destructive effect of the laser irradiated target can be reached to the best by increasing the output energy and power density,reducing the radius of laser spot and selecting reasonable pulse interval time within the limits allowed.
引文
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[15]徐立君,张喜和,倪晓武,等.不同光斑半径的连续激光作用金属靶材的温度场[J].红外与激光工程,2007,36(z1):632-635.XU Li-jun,ZHANG Xi-he,NI Xiao-wu,et al. Temperature field of the CW-laser with different radius irradiating metal plate[J]. Infrared and Laser Engineering,2007,36(z1):632-635.
[16]张帆,牛燕雄,刘宁,等.激光辐照CCD温度场与热应力场的研究[J].激光技术,2017,41(3):433-437.ZHANG Fan,NIU Yan-xiong,LIU Ning,et al. Research of temperature field and thermal stress field of CCD under laser irradiation[J]. Laser Technology,2017,41(3):433-437.
[17]张英聪,沈华,朱日宏.连续激光辐照材料的三维温度场[J].中国激光,2013,40(8):131-135.ZHANG Ying-cong,SHEN Hua,ZHU Ri-hong. Three-dimensional temperature field of material irradiated by continuous wave laser[J]. Chinese Journal of Lasers,2013,40(8):131-135.
[18]强希文.强激光与靶材相互作用的力学效应研究[J].激光与红外,2000,30(3):141-144.QIANG Xi-wen. Investigation on mechanical effects of laser-targets interaction[J]. Laser&Infrared,2000,30(3):141-144.
[19] Wang G,Xu Q,Liu Y,et al. Transient distributions of temperature field and thermal stress field induced by laser irradiation[J]. Journal of Applied Optics,2011,32(4):801-805.
[20] Kellogg G L. Determining the field emitter temperature during laser irradiation in the pulsed laser atom probe[J].Journal of Applied Physics,1981,52(8):5320-5328.
[21]吴艳梅,李俊昌.高能激光武器热毁伤仿真研究[J].电光与控制,2009,16(2):33-35.WU Yan-mei,LI Jun-chang. On heat destruction simulation of high-energy laser weapon[J]. Electronics Optics&Control,2009,16(2):33-35.
[2]张可星.长脉冲激光辐照LY-12铝靶烧蚀表面的后退速度[J].强激光与粒子束,1991(1):113-120.ZHANG Ke-xing. Recession velocity of ablated surface for LY-12 aluminum targets irradiated by a long-pulse laser beam[J]. High Power Laser and Particle Beams,1991(1):113-120.
[3] Yu Z K,He H B,Li X,et al. Stress mechanism of pulsed laser-driven damage in thin film under nanosecond ultraviolet laser irradiation[J]. Chinese Optics Letters,2013,11(7):74-75.
[4] Liedahl D A,Rubenchik A,Libby S B,et al. Pulsed laser interactions with space debris:Target shape effects[J].Advances in Space Research,2013,52(5):895-915.
[5] Shin J,Mazumder J. Numerical and experimental study on the effect of the pulse format in laser drilling[J]. Journal of Laser Applications,2016,28(1):012008.
[6] Moure Flores F D,Quinones Galvan J G,Guillen Cervantes A,et al. CdTe thin films grown by pulsed laser deposition using powder as target:Effect of substrate temperature[J]. Journal of Crystal Growth,2014,386(2):27-31.
[7] Ujimoto K,Yoshimura T,Ashida A,et al. Effect of target surface microstructure on morphological and electrical properties of pulsed-laser-deposited BiFeO3epitaxial thin films[J]. Japanese Journal of Applied Physics,2013,52(4R):045803.
[8]王春奎,傅裕寿,方慧英,等.强脉冲CO2激光对红外材料的破坏现象[J].中国激光,1986,36(9):386-390.WANG Chun-kui,FU Yu-shou,FANG Hui-ying,et al. The damagephenomena on infrared materials irradiated by intense pulsed CO2laser[J]. Chinese Journal of Lasers,1986,36(9):386-390.
[9]强希文,张建泉,李邦固,等.高功率脉冲激光产生的激波在靶材中的传播[J].红外与激光工程,2000,29(2):41-45.QIANG Xi-wen,ZHANG Jian-quan,LI Bang-gu,et al. Investigation on shock wave propagation in target induced by powerful pulsed laser beams[J]. Infrared and Laser Engineering,2000,29(2):41-45.
[10]张建泉,陈荣华,强希文,等.激光产生的激波在靶材中的传播及层裂效应[J].中国激光,2002,29(3):197-200.ZHANG Jian-quan,CHEN Rong-hua,QIANG Xi-wen,et al. Propagation and spall effect of shock wave induced by laser in targets[J]. Chinese Journal of Lasers,2002,29(3):197-200.
[11]张端明,李智华,黄明涛,等.脉冲激光烧蚀块状靶材的双动态界面研究[J].物理学报,2001,50(5):914-920.ZHANG Duan-ming,LI Zhi-hua,HUANG Ming-tao,et al. Study on the twin dynamic interfaces of bulk target irradiated by pulsed laser[J]. Acta Physica Sinica,2001,50(5):914-920.
[12]姜学东,王彧,陈纪然,等.热阻塞效应对激光辐照靶材烧蚀过程的影响分析[J].强激光与粒子束,2017,29(12):129001-5.JIANG Xue-dong,WANG Yu,CHEN Ji-ran,et al. Analysis of influence of thermal blockage on process of laser irradiation[J]. High Power Laser and Particle Beams,2017,29(12):129001-5.
[13]赵方东,苏心智,江东,等.长脉冲激光辐照下金属材料靶熔融和汽化过程的模拟计算[J].激光杂志,2007,28(3):79-80.ZHAO Fang-dong,SU Xin-zhi,JIANG Dong,et al. Numerical simulations of melting and vaporization processes of metal targets under long pulse laser irradiations[J]. Laser Journal,2007,28(3):79-80.
[14]张屹,李力钧,金湘中,等.激光深熔焊接小孔效应的传热性研究[J].中国激光,2004,31(12):1538-1542.ZHANG Yi,LI Li-jun,JIN Xiang-zhong,et al. Diathermancy study on keyhole effects in laser deep penetration welding[J]. Chinese Journal of Lasers,2004,31(12):1538-1542.
[15]徐立君,张喜和,倪晓武,等.不同光斑半径的连续激光作用金属靶材的温度场[J].红外与激光工程,2007,36(z1):632-635.XU Li-jun,ZHANG Xi-he,NI Xiao-wu,et al. Temperature field of the CW-laser with different radius irradiating metal plate[J]. Infrared and Laser Engineering,2007,36(z1):632-635.
[16]张帆,牛燕雄,刘宁,等.激光辐照CCD温度场与热应力场的研究[J].激光技术,2017,41(3):433-437.ZHANG Fan,NIU Yan-xiong,LIU Ning,et al. Research of temperature field and thermal stress field of CCD under laser irradiation[J]. Laser Technology,2017,41(3):433-437.
[17]张英聪,沈华,朱日宏.连续激光辐照材料的三维温度场[J].中国激光,2013,40(8):131-135.ZHANG Ying-cong,SHEN Hua,ZHU Ri-hong. Three-dimensional temperature field of material irradiated by continuous wave laser[J]. Chinese Journal of Lasers,2013,40(8):131-135.
[18]强希文.强激光与靶材相互作用的力学效应研究[J].激光与红外,2000,30(3):141-144.QIANG Xi-wen. Investigation on mechanical effects of laser-targets interaction[J]. Laser&Infrared,2000,30(3):141-144.
[19] Wang G,Xu Q,Liu Y,et al. Transient distributions of temperature field and thermal stress field induced by laser irradiation[J]. Journal of Applied Optics,2011,32(4):801-805.
[20] Kellogg G L. Determining the field emitter temperature during laser irradiation in the pulsed laser atom probe[J].Journal of Applied Physics,1981,52(8):5320-5328.
[21]吴艳梅,李俊昌.高能激光武器热毁伤仿真研究[J].电光与控制,2009,16(2):33-35.WU Yan-mei,LI Jun-chang. On heat destruction simulation of high-energy laser weapon[J]. Electronics Optics&Control,2009,16(2):33-35.