用高灵敏度激光干涉仪测量Z-pinch喷气负载质量线密度  

Line mass-density measurements of gas puff Z-pinch load using high sensitive laser interferometer

作　　者：何安[1] 杨向东[1] 邓建军[2] 李业勋[2] 李丰平[2] 姜巍[2] 陈林[2] 邹杰[2] 

机构地区：[1]四川大学原子与分子物理研究所,成都610064 [2]中国工程物理研究院流体物理研究所,四川绵阳621900

出　　处：《强激光与粒子束》2006年第6期1049-1052,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金资助课题(10574096);高等教育博士点基金资助课题(20050610010)

摘　　要：介绍了采用外差式记录系统和相位跟踪方法建立的高灵敏度(0.2°)迈克尔逊激光干涉系统对Z-pinch喷气负载质量线密度的测量。通过采用充气隔振光学平台和将干涉仪放置到喷气真空室内等隔振方法,有效地消除了机械振动对测量结果的影响,获得了拉瓦尔喷嘴产生的超音速Ar气喷气负载平均质量线密度随时间的变化曲线,为优化喷嘴理论设计程序提供了实验依据。气流稳态的建立时间可以用于精确控制喷气装置电磁阀门的打开时刻,保证喷气Z-pinch实验中脉冲功率装置提供的脉冲电流与喷气负载平顶之间的时间同步。The high sensitive laser interferometer of checking minuteness phase shift 0.2° was built using the way of heterodyne and phase track. The line mass-density of gas puff Z-pinch load was measured. The interruption of machine vibration to interference-signal was eliminated by putting the interferometer into the vacuum chamber and setting the laser and vacuum chamber and optic elements on the full gas optical platform. The curve of average line mass-density of Ar gas load varying with time was obtained. It can be used to optimize the Lavale nozzle design. The forming time of gas fluid stationary state is helpful for adjusting the synchronization between the opening time of electromagnetic valve and the drive current from pulse power facilities in Z-pinch experiment.

关 键 词：喷气Z-pinch 拉瓦尔喷嘴 迈克尔逊干涉仪 相位 质量线密度 负载 

分 类 号：TH744.3[机械工程—光学工程] TL65[机械工程—仪器科学与技术]