Dynamically pre-compressed hydrocarbons studied by self-impedance mismatch  

作　　者：N.J.Hartley C.Zhang X.Duan L.G.Huang S.Jiang Y.Li L.Yang A.Pelka Z.Wang J.Yang D.Kraus 

机构地区：[1]Helmholtz-Zentrum Dresden-Rossendorf,01328 Dresden,Germany [2]Laser Fusion Research Center,China Academy of Engineering Physics,Mianyang,China [3]Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang,China [4]European XFEL GmbH,22869 Schenefeld,Germany [5]Technische Universitat Dresden,01062 Dresden,Germany

出　　处：《Matter and Radiation at Extremes》2020年第2期26-32,共7页极端条件下的物质与辐射（英文）

基　　金：The authors would like to thank the technical teams at LFRC for their invaluable work producing the targets and operating the facility.N.J.H.and D.K.were supported by the Helmholtz Association under Grant No.VH-NG-1141.Y.L.was supported by the National Natural Science Foundation of China(Grant No.11605189).

摘　　要：Using the SG-III prototype laser at China Academy of Engineering Physics,Mianyang,we irradiated polystyrene(CH)samples with a thermal radiation drive,reaching conditions on the principal Hugoniot up to P≈1 TPa(10 Mbar),and away from the Hugoniot up to P≈300 GPa(3 Mbar).The response of each sample was measured with a velocity interferometry diagnostic to determine the material and shock velocity,and hence the conditions reached,and the reflectivity of the sample,from which changes in the conductivity can be inferred.By applying the selfimpedance mismatch technique with the measured velocities,the pressure and density of thermodynamic points away from the principal Hugoniot were determined.Our results show an unexpectedly large reflectivity at the highest shock pressures,while the off-Hugoniot points agree with previous work suggesting that shock-compressed CH conductivity is primarily temperature-dependent.

关 键 词：IMPEDANCE REFLECTIVITY shock 

分 类 号：TN24[电子电信—物理电子学]