用四极质谱定量分析方法观察了2kW TE CO_2激光器放电过程等离子化学现象.在16mA/cm^2电流密度条件下,CO_2分解量为初始注入量的20%,停止放电后基本恢复.系统达到均匀平稳约需半小时.CO_2的分解使输出功率约下降1.5%.输出功率随工作气...用四极质谱定量分析方法观察了2kW TE CO_2激光器放电过程等离子化学现象.在16mA/cm^2电流密度条件下,CO_2分解量为初始注入量的20%,停止放电后基本恢复.系统达到均匀平稳约需半小时.CO_2的分解使输出功率约下降1.5%.输出功率随工作气体温度上升里线性下降趋势,下降速度约为38W/℃.未明显见到有害的NO_x生成.展开更多
Air-breathing mode laser propulsion experiment with a long-pulse transversely excited （TE） CO2 laser is carried out, and its ignition problem is solved with the ignition needle of lightcraft. Owing to the ignition n...Air-breathing mode laser propulsion experiment with a long-pulse transversely excited （TE） CO2 laser is carried out, and its ignition problem is solved with the ignition needle of lightcraft. Owing to the ignition needle, an order of magnitude reduction in the ignition threshold is demonstrated. The result is compared with previous study. The momentum coupling coefficient is also measured in the experiment and its dependence upon laser pulse energy （6 14 J） and pulse width （20, 32, and 40 μs） is discussed.展开更多
文摘用四极质谱定量分析方法观察了2kW TE CO_2激光器放电过程等离子化学现象.在16mA/cm^2电流密度条件下,CO_2分解量为初始注入量的20%,停止放电后基本恢复.系统达到均匀平稳约需半小时.CO_2的分解使输出功率约下降1.5%.输出功率随工作气体温度上升里线性下降趋势,下降速度约为38W/℃.未明显见到有害的NO_x生成.
文摘Air-breathing mode laser propulsion experiment with a long-pulse transversely excited （TE） CO2 laser is carried out, and its ignition problem is solved with the ignition needle of lightcraft. Owing to the ignition needle, an order of magnitude reduction in the ignition threshold is demonstrated. The result is compared with previous study. The momentum coupling coefficient is also measured in the experiment and its dependence upon laser pulse energy （6 14 J） and pulse width （20, 32, and 40 μs） is discussed.
