论文部分内容阅读
高能激光功率高、能量大,造成激光能量计容易损坏和测量不确定度增加。围绕上述问题对国内外现有的几种高能激光能量直接测量方法进行了比较和归纳,对各种技术的优点和缺点作了深入的分析,在此基础上阐述了高能激光能量直接测量技术的发展趋势。研究表明,提高热交换效率是提升高能激光能量计测量能力最高效的措施,尤其是在采用体吸收模式和强制热交换模式的情况下这种效果更加明显;消除吸收体上温度梯度对吸收体材料比热和温度传感器响应时间的影响是提高被动吸收型高能激光能量计测量准确度的关键,在水流冷却型高能激光能量计和水流直接吸收型高能激光能量计中消除水流相变的影响和控制水流温度场不均匀造成的影响则是保证温度准确测量的关键。目前各种高热交换效率和新体制的测量方法得到快速发展和应用,系统的测量能力和测量准确度大幅提高,为了适应未来长时间测量需求,能量累积型高能激光能量计逐渐被功率平衡型高能激光能量计所替代。
High-power laser power, high energy, resulting in laser energy meter is easy to damage and increase the measurement uncertainty. Based on the above problems, several direct and indirect measurements of high energy laser energy at home and abroad are compared and summarized. The advantages and disadvantages of various technologies are analyzed in depth. Based on this, the direct measurement techniques of high energy laser energy development trend. The research shows that increasing the heat exchange efficiency is the most effective measure to improve the measuring ability of high energy laser energy meter, especially in the case of adopting body absorption mode and forced heat exchange mode. The effect of eliminating temperature gradient on absorption body The effect of material specific heat and temperature sensor response time is the key to improve the measurement accuracy of passive absorption type high energy laser energy meter. It eliminates the influence of water phase transition in water cooled high energy laser energy meter and water flow direct absorption high energy laser energy meter. It is the key to ensure accurate temperature measurement when controlling the influence caused by uneven temperature field of water flow. At present, various measurement methods of high heat exchange efficiency and new system have been rapidly developed and applied, and the measurement capability and measurement accuracy of the system have been greatly improved. In order to meet the need of long-term measurement in future, the energy accumulation type high-energy laser energy meter is gradually replaced by the power balance type high energy Laser energy meter replaced.