(a) Experimental setup. (b) The top is shock velocity in both and CH from experiment (closed circles). The bottom shows corresponding raw VISAR image. (c) The top is self-emission intensity in both and CH. The bottom shows corresponding raw SOP image.
The impedance mismatching in the plane. Dotted-dashed and dotted lines are the Hugoniot and release isentrope of from its shocked state (closed diamond), respectively. The straight line is the CH Rayleigh line defined by measured . Intersections of the isentrope and the Rayleigh line are experimental CH data (closed circle). Data from time-resolved measurements (closed circle) are compared to from time-averaged (open circles labeled by and ). The solid and long-dashed curves show theoretical Hugoniots for CH (Refs. 27 and 28). The inset is a magnified view around the intersection of the Rayleigh line of CH with the RI and IH of , which provided the Hugoniot data with uncertainties obtained in this work. The dashed–double-dotted line in the inset shows the IH for .
CH Hugoniot data. (a) The Hugoniot presented as vs . Also shown are the SESAME tabular EOS (Ref. 27) (solid line); original QEOS (Ref. 28) (dotted); modified QEOS (Ref. 34) (dashed); Ree’s model (Ref. 35) (dotted-dashed). (b) The Hugoniot with same symbols as in (a).
Polystyrene Hugoniot results from impedance mismatching to a quartz standard. and are the measured shock velocities in -quartz and CH with measurement errors. , , and are the particle velocity, pressure, and density of shock compressed CH inferred from impedance-matching calculations. The errors come from measurement uncertainties in and . The RI and IH with these parameters indicate that release isentrope and inverted Hugoniot are used to determine the Hugoniot point, respectively.
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