激光熔蚀过程中等离子体冲击波压缩层能量演化  

Energy Evolvement of Laser-induced Plasma Shock-wave Shell in Laser Ablation Process

作　　者：王春勇[1] 张平[1] 赖小明[1] 纪运景[1] 卞保民[1] 李振华[1] 

机构地区：[1]南京理工大学信息物理与工程系,南京210094

出　　处：《光散射学报》2007年第2期195-201,共7页The Journal of Light Scattering

基　　金：国家自然科学基金(60378003);南京理工大学博士创新基金

摘　　要：从冲击波基本性质出发,在冲击波压缩层内物质密度均匀的前提下,结合流体力学守恒方程得到冲击波压缩层的机械能通用表达式。继而,分析了激光等离子体球面衰减冲击波情况下冲击波压缩层机械能演变,发现压缩层内的机械能随着冲击波的外向传播出现增大;进而提出波后等离子体区域可能存在其他储能机制,该能量在不断向外界输送能量。最后通过铝靶熔蚀实验,证实了等离子体区域内存在电场能。With the assumption of density uniformity in shock compressed shell, the general expression for the mechanical energy in shock shell is obtained theoretically combining the hydromechanical conservation equations. The evolvement of mechanical energy in shock shell is simulated in the case of laser- induced plasma decayed spherlcal shock, which shows the me- chanical energy of the mass in shock sell increases with the shock- wave propagation. The special deposition energy mechanism in plasma area is advanced out who transfer the energy to the outside continuously. Finally, the laser ablation experiment with aluminum target is carried out, which is a powerful proof of the electrical energy existence.

关 键 词：激光等离子体 电场能 压缩层 冲击波 

分 类 号：TN241[电子电信—物理电子学] TL65[核科学技术—核技术及应用]