Oxford Centre for High Energy Density Science (OxCHEDS)

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Turbulent amplification of magnetic fields in laboratory laser-produced shock waves

Nature Physics Springer Nature 10:7 (2014) 520-524

Authors:

J Meinecke, HW Doyle, F Miniati, AR Bell, R Bingham, R Crowston, RP Drake, M Fatenejad, M Koenig, Y Kuramitsu, C C. Kuranz, DQ Lamb, D Lee, MJ MacDonald, CD Murphy, H-S Park, A Pelka, A Ravasio, Y Sakawa, AA Schekochihin, A Scopatz, P Tzeferacos, WC Wan, NC Woolsey, R Yurchak, B Reville, G Gregori
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Temporal evolution of longitudinal bunch profile in a laser wakefield accelerator

(2014)

Authors:

M Heigoldt, SI Bajlekov, A Popp, K Khrennikov, J Wenz, SW Chou, B Schmidt, SM Hooker, S Karsch
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Boosting the performance of Brillouin amplification at sub-quarter-critical densities via reduction of parasitic Raman scattering

(2014)

Authors:

RMGM Trines, EP Alves, KA Humphrey, R Bingham, RA Cairns, F Fiuza, RA Fonseca, LO Silva, PA Norreys
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Developments in laser-driven plasma accelerators

(2014)
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Evidence for a glassy state in strongly driven carbon

Scientific Reports Springer Nature 4 (2014) 5214

Authors:

CRD Brown, M Cammarata, BI Cho, T Döppner, K Engelhorn, E Förster, C Fortmann, D Fritz, E Galtier, SH Glenzer, M Harmand, P Heimann, NL Kugland, DQ Lamb, HJ Lee, RW Lee, H Lemke, M Makita, A Moinard, CD Murphy, B Nagler, P Neumayer, K-U Plagemann, R Redmer

Abstract:

Here, we report results of an experiment creating a transient, highly correlated carbon state using a combination of optical and x-ray lasers. Scattered x-rays reveal a highly ordered state with an electrostatic energy significantly exceeding the thermal energy of the ions. Strong Coulomb forces are predicted to induce nucleation into a crystalline ion structure within a few picoseconds. However, we observe no evidence of such phase transition after several tens of picoseconds but strong indications for an over-correlated fluid state. The experiment suggests a much slower nucleation and points to an intermediate glassy state where the ions are frozen close to their original positions in the fluid.
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