Brominated plastic equation of state measurements using laser driven shocks

Abstract

In order for brominated plastic (CHBr) to be used in future large lasers, such as the National Ignition Facility, capsule design, and equation of state (EOS) data are needed to address uncertainties in modeling. We have performed CHBr EOS measurements using the impedance matching technique. Laser beams spatially smoothed, and giving a spot size of 400 μm and intensities ⩽5×1013 W/cm2, produced high-quality shock waves allowing the simultaneous measurements of the shock velocities in two materials, one used as reference. Results are compared to other experiments and to EOS calculations. We obtained very good agreement with the theoretical curve for pressures ranging from 1 to 3 Mbar.

Electronic Structure Investigation of Highly Compressed Aluminum withKEdge Absorption Spectroscopy

“…Understanding warm dense matter (WDM), namely, the state of matter lying at the frontier between condensed matter and plasma physics, is of great interest for different fields of physics, such as planetology and inertial confinement fusion [1][2][3][4][5]. This regime of matter is characterized by near or above solid densities and by temperatures up to 100 eV.…”

First-principles equation of state and shock compression predictions of warm dense hydrocarbons

“…Accurate knowledge of the equation of state (EOS) of the hydrocarbon ablator is essential for optimizing experimental designs to achieve desired density and temperature states in a target. Consequently, a number of planar-driven shock wave experiments have been performed on hydrocarbon materials, including polystyrene (CH) [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23], glow-discharge polymer (GDP) [24][25][26][27][28], and foams [29][30][31][32], to measure the EOS. The highest pressure achieved among these experiments is 40 Mbar [14,15], which is yet not high enough to probe the effects of Kshell ionization on the shock Hugoniot curve.…”

Equation of State Data for Iron at Pressures beyond 10 Mbar

“…Recently, laser-driven shocks have become a reliable tool in high pressure physics thanks to developments in control of uniformity, steadiness, and preheating [24][25][26][27], and have been used for EOS measurements of deuterium [28], copper [29], plastic [30], and gold [31].…”