悬摆法测量气体推进剂激光推进冲量耦合系数

 给出了悬摆法测量激光推进冲量耦合系数的原理，分别以空气、氩气、氮气和氦气为推进剂，用悬摆法测量了抛物形推力器在能量不同的单脉冲TEA CO₂激光辐照下的冲量耦合系数。实验结果表明：氩气的冲量耦合系数最高，氦气的冲量耦合系数最低；在实验测试的激光能量范围内，4种推进剂气体的激光推进冲量耦合系数基本上都随着激光能量的增加而线性增大，冲量耦合系数的相对误差为5.4%~6.4%。实验结果与国外相关实验结论一致。

Measurement of impulse coupling coefficients of laser gas propulsion with a pendulum system

The test principle of pendulum system for laser propulsion was provided.The momentum coupling coefficients of a parabol laser propulsion thruster were measured by a pendulum system using air,helium,nitrogen and argon as propellant respectively.The experimental results indicated that the coupling coefficient of the propulsion argon was the highest when the propellant was and that of was the lowest when the propellant was helium.Relative error of the momentum coupling coefficient was 5.4~6.4%.