Observation of finite-wavelength screening in high-energy-density matter

D. A. Chapman (), J. Vorberger, L. B. Fletcher, R. A. Baggott, L. Divol, T. Döppner, R. W. Falcone, S. H. Glenzer, G. Gregori, T. M. Guymer, A. L. Kritcher, O. L. Landen, T. Ma, A. E. Pak and D. O. Gericke
Additional contact information
D. A. Chapman: AWE plc
J. Vorberger: Max-Planck-Institut für die Physik komplexer Systeme
L. B. Fletcher: SLAC National Accelerator Laboratory
R. A. Baggott: Centre for Fusion, Space and Astrophysics, University of Warwick
L. Divol: National Ignition Facility and Photon Science Directorate, Lawrence Livermore National Laboratory
T. Döppner: National Ignition Facility and Photon Science Directorate, Lawrence Livermore National Laboratory
R. W. Falcone: University of California
S. H. Glenzer: SLAC National Accelerator Laboratory
G. Gregori: University of Oxford
T. M. Guymer: AWE plc
A. L. Kritcher: National Ignition Facility and Photon Science Directorate, Lawrence Livermore National Laboratory
O. L. Landen: National Ignition Facility and Photon Science Directorate, Lawrence Livermore National Laboratory
T. Ma: National Ignition Facility and Photon Science Directorate, Lawrence Livermore National Laboratory
A. E. Pak: National Ignition Facility and Photon Science Directorate, Lawrence Livermore National Laboratory
D. O. Gericke: Centre for Fusion, Space and Astrophysics, University of Warwick

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract A key component for the description of charged particle systems is the screening of the Coulomb interaction between charge carriers. First investigated in the 1920s by Debye and Hückel for electrolytes, charge screening is important for determining the structural and transport properties of matter as diverse as astrophysical and laboratory plasmas, nuclear matter such as quark-gluon plasmas, electrons in solids, planetary cores and charged macromolecules. For systems with negligible dynamics, screening is still mostly described using a Debye–Hückel-type approach. Here, we report the novel observation of a significant departure from the Debye–Hückel-type model in high-energy-density matter by probing laser-driven, shock-compressed plastic with high-energy X-rays. We use spectrally resolved X-ray scattering in a geometry that enables direct investigation of the screening cloud, and demonstrate that the observed elastic scattering amplitude is only well described within a more general approach.

Date: 2015
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DOI: 10.1038/ncomms7839

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