论文部分内容阅读
强激光与固体靶物质相互作用产生的等离子体膨胀对靶有强烈的反冲作用,这就是激光等离子体推进的基本思想。固体靶获得冲量大小的测量在研究冲量传递效率过程中有重要作用。采用一种悬摆法和光电测速法相结合的测量方法对激光等离子体膨胀时靶摆动的周期、角速度进行了实验测量,结合测试装置的几何结构和流体力学理论得到了有空气阻力影响下靶的摆动方程,并将实验测量的靶摆动周期与由摆动方程计算的结果进行了比较,两者之间的相对误差小于0．5％,即这一摆动方程能较精确地描述靶的摆动过程,采用此摆动方程和实验测量的靶摆动角速度求得了靶的冲量。理论和实验研究结果表明该测试方法具有结构简单、操作方便、测量精确度高等特点。
The intense plasma recoil caused by the interaction of a strong laser with a solid target material has a strong recoil effect on the target, which is the basic idea of laser plasma propulsion. The measurement of the magnitude of the impulse obtained by the solid target plays an important role in the study of the impulse transfer efficiency. The method of combining the dangling method and photoelectric tachymetry is used to measure the period and angular velocity of the target swirling when the laser plasma is expanded. Based on the geometric structure of the testing device and the fluid mechanics theory, Compared with the experimental results, the relative error between them is less than 0.5%. That is to say, this wobble equation can describe the wobble of the target more accurately, The impulse of the target was obtained by using this oscillating equation and experimentally measured target angular velocity. Theoretical and experimental results show that the test method has the advantages of simple structure, convenient operation and high measurement accuracy.