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

被引：14

作者：

Fletcher, L. B. ^{[1
]}

Kritcher, A. ^{[2
]}

Pak, A. ^{[2
]}

Ma, T. ^{[2
]}

Doeppner, T. ^{[2
]}

Fortmann, C. ^{[2
,3
]}

Divol, L. ^{[2
]}

Landen, O. L. ^{[2
]}

Vorberger, J. ^{[5
]}

Chapman, D. A. ^{[5
,6
]}

Gericke, D. O. ^{[5
]}

Falcone, R. W. ^{[1
,4
]}

Glenzer, S. H. ^{[2
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[3] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[5] Univ Warwick, Dept Phys, Ctr Fus Space & Astrophys, Coventry CV4 7AL, W Midlands, England

[6] AWE Plc, Dept Plasma Phys, Aldermaston, England

来源：

PHYSICS OF PLASMAS | 2013年 / 20卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

COMPTON-SCATTERING; IONIZATION; EQUATION; PLASMA; ENERGY; SIMULATIONS; POLYSTYRENE; MIXTURES;

D O I：

10.1063/1.4807032

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

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 mu m thick CH shell above solid-mass density using three coalescing shocks. Separately, a laser-produced zinc He-a 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 rho > 6 g cm(-3). In addition, 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. (C) 2013 AIP Publishing LLC.

引用

页数：7

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