X-ray Thomson scattering measurements of temperature and density from multi-shocked CH capsules

Fletcher, L. B.; Kritcher, A.; Pak, A.; Ma, T.; Doppner, T.; Fortmann, C.; Divol, L.; Landen, O. L.; Vorberger, J.; Chapman, D. A.; Gericke, D. O.; Falcone, R. W.; Glenzer, S. H.

doi:10.1063/1.4807032

Title: X-ray Thomson scattering measurements of temperature and density from multi-shocked CH capsules

Journal Article · Fri May 24 00:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4807032· OSTI ID:1334509

Fletcher, L. B. ^[1]; Kritcher, A. ^[2]; Pak, A. ^[2]; Ma, T. ^[2]; Doppner, T. ^[2]; Fortmann, C. ^[3]; Divol, L. ^[2]; Landen, O. L. ^[2]; Vorberger, J. ^[4]; Chapman, D. A. ^[5]; Gericke, D. O. ^[4]; Falcone, R. W. ^[6]; Glenzer, S. H. ^[2]

Univ. of California, Berkeley, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of California, Los Angeles, CA (United States)
Univ. of Warwick, Coventry (United Kingdom)
Univ. of Warwick, Coventry (United Kingdom); AWE plc, Aldermaston (United Kingdom)
Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Proof-of-principle measurements of the electron densities, temperatures, and ionization states of spherically compressed multi-shocked CH (polystyrene) capsules have been achieved using spectrally resolved x-ray Thomson scattering. A total energy of 13.5 kJ incident on target is used to compress a 70 μm thick CH shell above solid-mass density using three coalescing shocks. Separately, a laser-produced zinc He-α x-ray source at 9 keV delayed 200 ps-800 ps after maximum compression is used to probe the plasma in the non-collective scattering regime. The data show that x-ray Thomson scattering enables a complete description of the time-dependent hydrodynamic evolution of shock-compressed CH capsules, with a maximum measured density of ρ > 6 g cm^–3. Additionally, the results demonstrate that accurate measurements of x-ray scattering from bound-free transitions in the CH plasma demonstrate strong evidence that continuum lowering is the primary ionization mechanism of carbon L-shell electrons.

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Research Organization:: Univ. of California, Berkeley, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG52-06NA26212; AC52-07NA27344

OSTI ID:: 1334509

Alternate ID(s):: OSTI ID: 1240054

Report Number(s):: LLNL-JRNL-611992; PHPAEN

Journal Information:: Physics of Plasmas, Vol. 20, Issue 5; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 12 works

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Density functional theory calculations of continuum lowering in strongly coupled plasmas Vinko, S. M.; Ciricosta, O.; Wark, J. S. Nature Communications, Vol. 5, Issue 1 https://doi.org/10.1038/ncomms4533	journal	March 2014

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