Analysis Of Uncertainties Of Mirror Reflection In High-pressure Impedance-match Measurements

:Laser shock loading dynamic high-pressure equation of state (EOS) is a relationships formula of different kinds of variables, which can describe the characteristics of matter under a given thermodynamic condition. Advances in this field will lead to the developments in laser inertial confinement fusion, material science, weapons physics, space technology and other applied sciences.The shock-wave impedance-match measurements are a common method of producing shock-wave equation-of-state (EOS) data for a variety of different sample materials. Such measurements depend on the accurate knowledge of the equation of state of the standard and are therefore considered as relative measurements. These measurements are performed by transmitting a shock wave from a known material (the reference standard) into an unknown sample. From measurements of two observables, usually the shock velocities in the standard and in the sample, the shock velocities in the standard and in the sample, and using the Rankine-Hugoniot conservation relations, one can deduce the pressure, density, and internal energy in the shocked sample.In this paper, we introduce the uncertainty estimation of the physical parameters in the laser driven EOS impedance-matching experiment. The physical parameters’pertinence is critically analyzed. The effects of physical parameters’pertinence on the uncertainty of final metrical parameters(um、Pm) are achieved by the calculating of the existing experimental data.We also introduce a method for producing quatitative estimates of systematic uncertainties generated in the analysis of impedance-match shock-wave data. Central to the method is an analytic representation of the principal Hugoniot of the standard which incorporates a description of data-dependent uncertainties of the principal Hugoniot and model-dependent uncertainties of the off-Hugoniot states.