X-ray scattering measurements on imploding CH spheres at the National Ignition Facility

Kraus, D.; Chapman, D. A.; Kritcher, A. L.; Baggott, R. A.; Bachmann, B.; Collins, G. W.; Glenzer, S. H.; Hawreliak, J. A.; Kalantar, D. H.; Landen, O. L.; Ma, T.; Le Pape, S.; Nilsen, J.; Swift, D. C.; Neumayer, P.; Falcone, R. W.; Gericke, D. O.; Döppner, T.

doi:10.1103/PhysRevE.94.011202

Title: X-ray scattering measurements on imploding CH spheres at the National Ignition Facility

Journal Article · Thu Jul 21 00:00:00 EDT 2016 · Physical Review E

DOI:https://doi.org/10.1103/PhysRevE.94.011202· OSTI ID:1393340

Kraus, D. ^[1]; Chapman, D. A. ^[2]; Kritcher, A. L. ^[3]; Baggott, R. A. ^[4]; Bachmann, B. ^[3]; Collins, G. W. ^[3]; Glenzer, S. H. ^[5]; Hawreliak, J. A. ^[6]; Kalantar, D. H. ^[3]; Landen, O. L. ^[3]; Ma, T. ^[3]; Le Pape, S. ^[3]; Nilsen, J. ^[3]; Swift, D. C. ^[3]; Neumayer, P. ^[7]; Falcone, R. W. ^[1]; Gericke, D. O. ^[4]; Döppner, T. ^[3]

Univ. of California, Berkeley, CA (United States). Department of Physics
University of Warwick (United Kingdom). Centre for Fusion, Space and Astrophysics, Department of Physics; AWE plc (United Kingdom). Plasma Physics Group, Radiation Physics Department
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
University of Warwick (United Kingdom). Centre for Fusion, Space and Astrophysics, Department of Physics
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Washington State Univ., Pullman, WA (United States). Institute for Shock Physics
GSI Helmholtzzentrum fur Schwerionenforschung (Germany)

In this study, we have performed spectrally resolved x-ray scattering measurements on highly compressed polystyrene at pressures of several tens of TPa (100 Mbar) created by spherically convergent shocks at the National Ignition Facility. Scattering data of line radiation at 9.0 keV were recorded from the dense plasma shortly after shock coalescence. Accounting for spatial gradients, opacity effects, and source broadening, we demonstrate the sensitivity of the elastic scattering component to carbon K -shell ionization while at the same time constraining the temperature of the dense plasma. Finally, for six times compressed polystyrene, we find an average temperature of 86 eV and carbon ionization state of 4.9, indicating that widely used ionization models need revision in order to be suitable for the extreme states of matter tested in our experiment.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: AC52-07NA27344; FG52-10NA29649; NA0001859; 13-ERD-073

OSTI ID:: 1393340

Alternate ID(s):: OSTI ID: 1267540

Report Number(s):: LLNL-JRNL-704306; PLEEE8

Journal Information:: Physical Review E, Vol. 94, Issue 1; ISSN 2470-0045

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 47 works

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