ICF靶用纳米厚金属薄膜中超声波的激光激励  

Laser-Based Ultrasonic Generation in Metal Film With Nanometer Thickness Used in ICF Experiment

作　　者：王衍斌[1] 周建华[2] 余学才[2] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [2]电子科技大学光电信息学院,四川成都610054

出　　处：《原子能科学技术》2012年第8期978-981,共4页Atomic Energy Science and Technology

基　　金：863计划资助项目

摘　　要：简要介绍了激光超声和干涉仪检测原理,实现了一个激光超声实验。实验中,用调Q Nd:YAG固体激光器在超薄薄膜200nm Al/Au/Ag中激励高频超声,用迈克尔逊干涉仪对超声进行了检测,对获得的信号进行傅里叶变换,获得了激励的振动频率。3种薄膜中产生的单一频率的超声振动分别为32.36、26.17和29.39MHz。本工作对纳米薄膜的超声检测有一定的参考和借鉴作用。The generation and detection of laser-based ultrasound were introduced. The experiment was performed. A beam of laser with pulse width of 7 ns produced by Q switch Nd-YAG was used to irradiate A1/Au/Ag metal films with thickness of 200 nm. The signal was detected by Michael interference method and transferred by Fourier method. The ultrasonic vibration frequencies excited in the sample are 32.36, 26.17 and 29.39 MHz, respectively. The work is valuable to detect nano- and micro-meter films used to ICF experiment for the future.

关 键 词：金属薄膜 激光激励 超声波 

分 类 号：TN247[电子电信—物理电子学]