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Absolute Equation-of-State Measurement for Polystyrene from 25 to 60 Mbar Using a Spherically Converging Shock Wave.

Döppner, T; Swift, D C; Kritcher, A L; Bachmann, B; Collins, G W; Chapman, D A; Hawreliak, J; Kraus, D; Nilsen, J; Rothman, S; Benedict, L X; Dewald, E; Fratanduono, D E; Gaffney, J A; Glenzer, S H; Hamel, S; Landen, O L; Lee, H J; LePape, S; Ma, T; MacDonald, M J; MacPhee, A G; Milathianaki, D; Millot, M; Neumayer, P; Sterne, P A; Tommasini, R; Falcone, R W.
Phys Rev Lett; 121(2): 025001, 2018 Jul 13.
Artigo em Inglês | MEDLINE | ID: mdl-30085737
We have developed an experimental platform for the National Ignition Facility that uses spherically converging shock waves for absolute equation-of-state (EOS) measurements along the principal Hugoniot. In this Letter, we present one indirect-drive implosion experiment with a polystyrene sample that employs radiographic compression measurements over a range of shock pressures reaching up to 60 Mbar (6 TPa). This significantly exceeds previously published results obtained on the Nova laser [R. Cauble et al., Phys. Rev. Lett. 80, 1248 (1998)PRLTAO0031-900710.1103/PhysRevLett.80.1248] at a strongly improved precision, allowing us to discriminate between different EOS models. We find excellent agreement with Kohn-Sham density-functional-theory-based molecular dynamics simulations.
Selo DaSilva