-
摘要: 实验研究了激光驱动飞片技术中激光能量剖面和飞片靶金属膜层的力学特性对飞片的速度和完整性的影响，认为激光能量剖面整体呈“平顶型”的光束是发射高质量飞片的基础，同时飞片靶的膜基附着力、金属膜层的强度和韧性三者之间应保持良好的匹配才能得到完整的飞片。制备了基底/Cr/Al复合结构飞片靶，利用波长1 064nm、脉宽15ns的激光，将直径1mm、厚度3μm的铝飞片稳定驱动至8km/s。Abstract: Aimed to the laser-driven flyer plate technique, laser-driven flyer experiments were conducted by using single pulsed laser beams at 1 064nm, of 15ns duration and up to 2Jenergy to explore the influences of the laser energy profiles as well as the mechanical properties of the metal foils on the velocities and integrities of the flyers.The experimental results indicate that the laser beams with "top hat" energy profiles are key and important base to launch the flyers with good qualities.There exists a good matching among the adhesion of the foil to the glass substrate, the shear strength and tenacity of the foil, for obtaining a high-velocity and good-integrity flyer.By using the combined flyer target with a thin layer of chromium sandwiched between the aluminum foil and the glass substrate, the aluminum flyers with 1mm in diameter and 3μm in thickness were accelerated to 8km/s, and the experimental repeatabilities were good.
-
图 4 2种不同的激光能量剖面及对应条件下的飞片完整性
Figure 4. Two kinds of laser energy profiles as well as corresponding flyer integrity
图 8 飞片靶的激光能量耦合效率随激光能量的变化
Figure 8. Energy coupling efficiency varied with laser fluence
图 9 不同结构飞片靶获得的飞片速度
Figure 9. Flyer velocities varied with laser fluence for different flyer targets
-
[1] Lawrence R J, Trott W M. Theoretical analysis of a pulsed-laser-driven hypervelocity flyer launcher[J]. International Journal of Impact Engineering, 1993, 14: 439-449. doi: 10.1016/0734-743X(93)90041-5 [2] Trott W M, Setchell R E, Farnsworth Jr A V. Development of laser-driven flyer techniques for equation-of-state studies of microscale materials[C]//AIP Conference Proceedings. 2002, CP620: 1347-1350. [3] Robbins D L, Gehr R J, Harper R W, et al. Laser-driven miniflyer induced gold spall[C]//AIP Conference Proceedings. 2000, CP505: 1199-1202. [4] Gu Z W, Sun C W, Zhao J H, et al. Experimental and numerical research on shock initiation of pentaerythritol tetranitrate by laser driven flyer plates[J]. Journal of Applied Physics, 2004, 96(1): 344-347. doi: 10.1063/1.1759796 [5] Roybal R, Tlomak P. Hypervelocity space debris testing[C]//AIAA Defense and Space Programs Conference, 1997, 3902. [6] Sheffield S A, Fisk G A. Particle velocity measurements of laser-induced shock waves using ORVIS[R]. CONF-830874-15, 1984. [7] Paisley D L, Montoya N I, Stahl D B, et al. Interferometry and high speed photography of laser-driven flyer plates[R]. CONF-8908140-1, 1989. [8] Tanaka K A, Motohiko H, Norimasa O, et al. Multi-layered flyer accelerated by laser induced shock waves[J]. Physics of Plasmas, 2000, 7(2): 676-680. doi: 10.1063/1.873851 [9] Paisley D L. Laser-driven miniature flyer plates for shock initiation of secondary explosives[R]. LA-UR-89-2723, 1989. [10] Okada K, Wakabayashi K, Takenaka H, et al. Experimental technique for launching miniature flying plates using laser pulses[J]. International Journal of Impact Engineering, 2003, 29: 497-502. doi: 10.1016/j.ijimpeng.2003.09.045 [11] Bowden M D, Knowles S L. Optimization of laser-driven flyer velocity using photonic doppler velocimetry[C]//Proceedings of SPIE, 2009, 743403: 1-11. [12] Greenaway M W, Proud W G, Field J E, et al. A laser-accelerated flyer system[J]. International Journal of Impact Engineering, 2003, 29: 317-321. doi: 10.1016/j.ijimpeng.2003.09.027 [13] 王春彦, 庄仕明.激光驱动飞片实验初步研究[C]//激光的热和力学效应会议论文集. 1994: 425-428. [14] 谷卓伟, 孙承纬, 刘仓理.小型激光器驱动飞片的平均速度测量研究[J].强激光与粒子束, 2001, 13(3): 309-312. http://d.wanfangdata.com.cn/Periodical/qjgylzs200103012Gu Zhuo-wei, Sun Cheng-wei, Liu Cang-li. The measurement of the average velocity of flyer driven by minisize laser[J]. High Power Laser and Particle Beams, 2001, 13(3): 309-312. http://d.wanfangdata.com.cn/Periodical/qjgylzs200103012 [15] 谷卓伟, 孙承纬, 苏小勇.小型激光器驱动飞片冲击引爆炸药实验研究[J].爆炸与冲击, 2002, 22(1): 88-91. doi: 10.3321/j.issn:1001-1455.2002.01.017Gu Zhuo-wei, Sun Cheng-wei, Su Xiao-yong. Experimental research on impacting and detonating explosive by mini size laser-driven-flyer[J]. Explosion and Shock Waves, 2002, 22(1): 88-91. doi: 10.3321/j.issn:1001-1455.2002.01.017 [16] 张文兵, 董洪建, 龚自正, 等.激光驱动微小碎片超高速发射技术研究[J].装备环境工程, 2007, 4(1): 56-61. doi: 10.3969/j.issn.1672-9242.2007.01.014Zhang Wen-bing, Dong Hong-jian, Gong Zi-zheng, et al. Hypervelocity micro-debris launched by laser-driven flyer device[J]. Equipment Environmental Engineering, 2007, 4(1): 56-61. doi: 10.3969/j.issn.1672-9242.2007.01.014 [17] 曹燕.激光驱动飞片技术的理论和实验研究[D].北京: 中国空间技术研究院, 2009: 35-57. [18] Frank A M, Trott W M. Stop motion microphotography of laser driven plates[C]//Proceedings of SPIE. 1994, 2273: 196-206. [19] Trott W M, Meeks K D. High-power Nd: Glass laser transmission through optical fibers and its use in acceleration of thin foil targets[J]. Journal of Applied Physics, 1990, 67(7): 3297-3301. doi: 10.1063/1.345364 [20] Paisley D L, Warnes R H, Kopp R A. Laser-driven flat plate impacts to 100GPa with sub-nanosecond pulse duration and resolution for material property studies[R]. LA-UR-91-3306, 1981. [21] Greenaway M W, Field J E. The development of a laser-driven flyer system[C]//AIP Conference Proceedings, 2004, CP706: 1389-1392. [22] Farnsworth A V, Trott W M, Setchell R E. A computational study of laser driven flyer plates[C]//AIP Conference Proceedings, 2001, CP620: 1355-1358. [23] Trott W M, Setchell R E, Farnsworth A V. Investigation of the effects of target material strength on the efficiency of acceleration of thick laser-driven flyers[C]//AIP Conference Proceedings, 2000, CP505: 1203-1206. -
下载:
图(11)
计量
- 文章访问数: 3258
- HTML全文浏览量: 390
- PDF下载量: 580
- 被引次数: 0