CEA, DAM, DIF, F-91297 Arpajon, France.
CEA, DAM, CESTA, F-33114 Le Barp, France.
Rev Sci Instrum. 2023 Mar 1;94(3):033905. doi: 10.1063/5.0107499.
We present a series of shock-wave measurements on aluminum based on the use of a simultaneous Photon Doppler Velocimetry (PDV) and triature velocity interferometer system for any reflector. Our dual setup can accurately measure shock velocities, especially in the low-speed range (<100 m s) and fast dynamics (<10 ns) where measurements are critical in terms of resolution and unfolding techniques. Especially, the direct comparison of both techniques at the same measurement point helps the physicist in determining coherent settings for the short time Fourier transform analysis of the PDV, providing increased reliability of the velocity measurement with a global resolution of few m s in velocity and few ns FWHM in time. The advantages of such coupled velocimetry measurements are discussed, as well as new opportunities in dynamic materials science and applications.
我们提出了一系列基于使用光子多普勒测速（PDV）和三方速度干涉仪系统的铝冲击波测量，该系统适用于任何反射器。我们的双设置可以准确地测量冲击波速度，特别是在低速范围（<100 m s）和快速动力学（<10 ns）下，在这些情况下，分辨率和展开技术对测量至关重要。特别是，在同一测量点上对两种技术的直接比较有助于物理学家确定 PDV 的短时间傅立叶变换分析的相干设置，从而提高速度测量的可靠性，速度的整体分辨率为几 m s，时间的半峰全宽为几 ns。讨论了这种耦合速度测量的优点，以及动态材料科学和应用中的新机会。
