Shock and thermal wave study of laser-induced plasmas in air by the probe beam deflection technique
Shock and thermal wave study of laser-induced plasmas in air by the probe beam deflection technique
复制标题
利用探测光束偏转技术研究空气中激光诱导等离子体的冲击和热波
DOI：
10.1088/0957-0233/14/5/311
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
R. Navarro‐González
中科院分区：
文献类型：
--
作者：
M. Villagrán‐Muniz;H. Sobral;R. Navarro‐González
用探针束偏转方法研究了7 ns波长为1.06µm的激光在大气压空气中聚焦产生的等离子体。利用该技术对衰变等离子体核心的激波演化和热空气热膨胀进行了监测。绘制了激波和热波的形状图，并测得速度高达528m和40m S−1，当S为1微米时。此外，还可以测量将热空气带到室温所需的松弛时间：测量为5ms。这项技术用途广泛、经济且易于实现，它提供了从微秒到毫秒的过程的基本信息。
A plasma induced by focusing a 7 ns Nd:YAG laser at 1.06 µm in air at atmospheric pressure was studied by the probe beam deflection method. The evolution of the shock wave and the thermal expansion of the hot air in the core of the decaying plasma were monitored by using this technique. The shapes of the shock and thermal waves were mapped and the velocities were determined as being as high as 528 and 40 m s−1 at 1 µs. In addition, it was also possible to measure the relaxation time required to bring the hot air to room temperature: it was measured to be 5 ms. This technique is versatile, economic, and simple to implement, giving essential information from processes that occur from the microsecond to the millisecond timescale.