Free-surface velocity measurements of opaque materials in laser-driven shock-wave experiments using photonic Doppler velocimetry

作     者：N.Nissim E.Greenberg M.Werdiger Y.Horowitz L.Bakshi Y.Ferber B.Glam A.Fedotov-Gefen L.Perelmutter S.Eliezer 

作者机构：Applied Physics DivisionSoreq NRCYavneIsrael Note:This paper is part of the Special Issue on Matter in Extreme States Created by Laser. 

出 版 物：《Matter and Radiation at Extremes》 (极端条件下的物质与辐射（英文）)

年 卷 期：2021年第6卷第4期

页      面：43-50页

核心收录：

学科分类：08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 081102[工学-检测技术与自动化装置] 0811[工学-控制科学与工程] 

主　　题：shock wave interferometry 

摘      要：We present a novel photonic Doppler velocimetry(PDV)design for laser-driven shock-wave *** PDV design is intended to provide the capability of measuring the free-surface velocity of shocked opaque materials in the terapascal *** present measurements of the free-surface velocity of gold for as long as∼2 ns from the shock breakout,at pressures of up to∼7 Mbar and a free-surface velocity of 7.3 km/s with an error of∼1.5%.Such laboratory pressure conditions are achieved predominantly at high-intensity laser facilities where the only velocity diagnostic is usually line-imaging velocity interferometry for any ***,that diagnostic is limited by the lower dynamic range of the streak camera(at a temporal resolution relevant to laser shock experiments)to measure the free-surface velocity of opaque materials up to pressures of only∼1 *** expect the proposed PDV design to allow the free-surface velocity of opaque materials to be measured at much higher pressures.