Simultaneous Temperature, Density and Velocity Measurements in Laser-Generated Plasmas by Rayleigh and Filtered Rayleigh Scattering
Simultaneous Temperature, Density and Velocity Measurements in Laser-Generated Plasmas by Rayleigh and Filtered Rayleigh Scattering
复制标题
通过瑞利和滤波瑞利散射同时测量激光产生的等离子体中的温度、密度和速度
DOI：
10.2514/6.2014-0143
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
R. Miles
中科院分区：
文献类型：
--
作者：
C. Limbach;R. Miles
本文用同步瑞利散射和滤波瑞利散射观测相结合的方法研究了30 mJ激光空气等离子体在形成后0.75 ~ 4 μs内形成的冲击波。一个新的变化的过滤瑞利散射技术，它允许温度，密度和径向速度被同时测量，假设一个圆柱对称的爆炸波膨胀。由此产生的温度，密度和速度数据集显示出良好的协议与修改后的分析模型的爆炸波演变。根据数据估计，超过1.25 mm半径的冲击波沉积的能量为8±1 mJ。这一结果的背景下，净能量平衡进行了讨论。
Simultaneous Rayleigh and filtered Rayleigh scattering observations are combined to characterize the shockwave formed by a 30mJ laser generated air plasma between 0.75 and 4 μs after formation. A new variation on the Filtered Rayleigh Scattering technique is presented which allows temperature, density and radial velocity to be measured simultaneously, assuming a cylindrically symmetric blast wave expansion. The resulting temperature, density and velocity dataset shows good agreement with a modified analytical model of blast wave evolution. The energy deposited by the shockwave beyond 1.25mm radius is estimated from the data to be 8±1 mJ. This result is discussed in the context of net energy balance.