DAC加载下材料高压声速的激光超声测量技术

马云; 张毅; 李加波; 蔡灵仓; 李剑峰; 柳雷; 敬秋民; 王志刚; 王翔; 翁继东; 等

doi:10.11858/gywlxb.2011.05.006

DAC加载下材料高压声速的激光超声测量技术

doi: 10.11858/gywlxb.2011.05.006

中国工程物理研究院流体物理研究所，冲击波物理与爆轰物理国防科技重点实验室，四川绵阳 621900

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通讯作者:
马云

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出版历程
- 收稿日期: 2010-03-29
- 修回日期: 2010-04-29
- 发布日期: 2011-10-15

High Pressure Sound Velocity Measurement of Material in DAC Using Laser Ultrasonics Technique

National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, China

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Corresponding author: MA Yun

摘要

摘要: 设计并建立了可测量金刚石压砧（DAC）加载下材料高压声速的激光超声系统。该系统采用脉宽为6.3 ns的调Q激光器作为超声波激发光源，使用光纤位移干涉仪和速度干涉仪混合系统进行超声位移探测，不需要借助其它任何参数即可直接测量样品的高压声速和原位厚度。利用该系统，测量了2.6 GPa压力下铜样品的高压纵波声速和原位厚度，并给出了测量结果。
- 激光超声 /
- 声速 /
- 干涉仪 /
- 铜 /
- 高压 /
- 金刚石压砧
Abstract: A prototype laser-based ultrasound system is designed and built to measure the sound velocity of samples at high pressure in a diamond anvil cell. The system uses a Q-switch laser with 6.3 ns pulse width for excitation of broadband ultrasonic waves, and an optical fiber displacement and velocity mixing interferometer for detection. Both longitudinal acoustic wave velocity and in-situ thickness of copper at the pressure of 2.6 GPa are obtained by this all-optical pump-probe technique, which does not require any information beyond that contained in the signal itself.
- laser ultrasonics /
- sound velocity /
- interferometer /
- copper /
- high pressure /
- diamond anvil cell

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参考文献(15)

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