Design of absolute equation of state measurements in optically thick materials by laser-driven shock waves

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 1998-10, Vol.415 (3), p.668-673
• Main Authors: Temporal, M, Atzeni, S, Batani, D, Koenig, M, Benuzzi, A, Faral, B
• Format: Article
• Language: English
• Subjects: ■
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/S0168-9002(98)00445-8

Some aspects of the design of a target for the absolute measurement of Equation-of-State data at pressure of tens of Mbar, in optically thick materials are discussed. In the proposed experiment, a shock wave is generated in a laser-irradiated sample, and the shock velocity and the material velocity behind the shock are simultaneously measured by the optical and X-ray diagnostics. Accurate measurements require the generation of a steady, planar shock, and the detection of the motion of a shocked fluid interface by transverse radiography. One- and two-dimensional numerical fluid simulations have been performed to optimize beam and target design, in order to fulfil such requirements.