摘要
针对激光对靶冲量传递问题,提出了悬摆法和光电测速法相结合的测量方法,进而在改变真空箱内的气压的条件下,就大气压强对激光推进耦合系数的影响进行了实验研究。采用单脉冲能量为210.24～218.7 mJ的Nd∶YAG激光器,对真空箱内的挂有铝靶的冲击摆进行激光冲量耦合系数的测定。实验发现随着真空箱内气压的上升,冲量耦合系数逐渐增大,在环境气压从1.013 25×105Pa到5.932 5×104Pa范围,Pirri理论与实验结果一致。
For studying the relation between laser impulse coupling coefficient and the ambient pressure, using the suction pump, the pressure in vacuum chamber is between 59 325 Pa and 101 325 Pa. While the energy of single Nd：YAG laser pulse is between 210.24 mJ and 218.7 mJ, and the aluminum target is hung in the vacuum chamber, the impulse-coupling coefficient is measured. From the experimental result, the laser impulse-coupling coefficient increases with the increment of ambient pressure in vacuum chamber and the explanation of this phenomenon is given.
出处
《光电子技术》
CAS
2007年第2期92-96,共5页
Optoelectronic Technology
基金
国家自然科学基金资助项目(60578015
60208004)
博士点基金(20050288025)
教育部高校优秀青年教师奖励计划资助项目
关键词
冲量耦合系数
环境气压
摆
真空箱
impulse coupling coefficient
ambient pressure
pendulum
vacuum chamber
