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Probing matter at Gbar pressures at the NIF

2013; Elsevier BV; Volume: 10; Linguagem: Inglês

10.1016/j.hedp.2013.11.002

1878-0563

A. L. Kritcher, T. Döppner, Damian Swift, J. Hawreliak, G. W. Collins, Joseph Nilsen, B. Bachmann, E. L. Dewald, D. J. Strozzi, S. Felker, O. L. Landen, O. S. Jones, C. A. Thomas, J. H. Hammer, C. J. Keane, H.J. Lee, S. H. Glenzer, S. D. Rothman, D. A. Chapman, D. Kraus, P. Neumayer, R. W. Falcone,

Laser-induced spectroscopy and plasma

We describe a platform to measure the material properties, specifically the equation of state and electron temperature, at pressures of 100 Mbar to a Gbar at the National Ignition Facility (NIF). In these experiments we launch spherically convergent shock waves into solid CH, CD, or diamond samples using a hohlraum radiation drive, in an indirect drive laser geometry. X-ray radiography is applied to measure the shock speed and infer the mass density profile, enabling determination of the material pressure and Hugoniot equation of state. X-ray scattering is applied to measure the electron temperature through probing of the electron velocity distribution via Doppler broadening.