Laboratory astroparticle physics

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The complex ion structure of warm dense carbon measured by spectrally resolved x-ray scatteringa)

Physics of Plasmas AIP Publishing 22:5 (2015) 056307

Authors:

D Kraus, J Vorberger, J Helfrich, DO Gericke, B Bachmann, V Bagnoud, B Barbrel, A Blažević, DC Carroll, W Cayzac, T Döppner, LB Fletcher, A Frank, S Frydrych, EJ Gamboa, M Gauthier, S Göde, E Granados, G Gregori, NJ Hartley, B Kettle, HJ Lee, B Nagler, P Neumayer, MM Notley, A Ortner, A Otten, A Ravasio, D Riley, F Roth, G Schaumann, D Schumacher, W Schumaker, K Siegenthaler, C Spindloe, F Wagner, K Wünsch, SH Glenzer, M Roth, RW Falcone
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Characterization of x-ray lens for use in probing high energy density states of matter

Journal of Instrumentation IOP Publishing 10:04 (2015) p04010-p04010

Authors:

P Mabey, NJ Hartley, HW Doyle, JE Cross, L Ceurvorst, A Savin, A Rigby, M Oliver, M Calvert, IJ Kim, D Riley, PA Norreys, CH Nam, DC Carroll, C Spindloe, G Gregori
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Observation of finite-wavelength screening in high-energy-density matter.

Nature communications 6 (2015) 6839

Authors:

DA Chapman, J Vorberger, LB Fletcher, RA Baggott, L Divol, T Döppner, RW Falcone, SH Glenzer, G Gregori, TM Guymer, AL Kritcher, OL Landen, T Ma, AE Pak, DO Gericke

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.
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Ultrabright X-ray laser scattering for dynamic warm dense matter physics

Nature Photonics Springer Nature 9:4 (2015) 274-279

Authors:

LB Fletcher, HJ Lee, T Döppner, E Galtier, B Nagler, P Heimann, C Fortmann, S LePape, T Ma, M Millot, A Pak, D Turnbull, DA Chapman, DO Gericke, J Vorberger, T White, G Gregori, M Wei, B Barbrel, RW Falcone, C-C Kao, H Nuhn, J Welch, U Zastrau, P Neumayer, JB Hastings, SH Glenzer
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Laser-driven platform for generation and characterization of strong quasi-static magnetic fields

(2015)

Authors:

JJ Santos, M Bailly-Grandvaux, L Giuffrida, P Forestier-Colleoni, S Fujioka, Z Zhang, Ph Korneev, R Bouillaud, S Dorard, D Batani, M Chevrot, J Cross, R Crowston, J-L Dubois, J Gazave, G Gregori, E d'Humières, S Hulin, K Ishihara, S Kojima, E Loyez, J-R Marquès, A Morace, Ph Nicolaï, O Peyrusse, A Poyé, D Raffestin, J Ribolzi, M Roth, G Schaumann, F Serres, VT Tikhonchuk, Ph Vacar, N Woolsey
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