Publications

2010

• From lasers to the universe: Scaling laws in laboratory astrophysics
  
  • Bouquet Serge
  • Falize Emeric
  • Michaut Claire
  • Gregory C. D.
  • Loupias B.
  • Vinci Tommaso
  • Koenig M.
  High Energy Density Physics, Elsevier, 2010, 6, pp.368-380. In this work scaling laws in laboratory astrophysics are studied. It is shown that mathematical models governing radiation hydrodynamics-driven phenomena are invariant under the homothetic group transformation and can be rescaled according to several types of scaling laws. This property is valid for both optically thick and optically thin materials and it allows a correct and rigorous connection between astrophysical objects or phenomena and laboratory experiments. This approach is applied to astrophysical jets and radiative shocks where advantages as well as difficulties are pointed out. (10.1016/j.hedp.2010.03.001)
  DOI : 10.1016/j.hedp.2010.03.001
• Laser-driven plasma jets propagating in an ambient gas studied with optical and proton diagnostics
  
  • Gregory C. D.
  • Loupias B.
  • Waugh J.
  • Dono S.
  • Bouquet Serge
  • Falize Emeric
  • Kuramitsu Y.
  • Michaut Claire
  • Nazarov W.
  • Pikuz S. A.
  • Sakawa Youichi
  • Woolsey N. C.
  • Koenig M.
  Physics of Plasmas, American Institute of Physics, 2010, 17, pp.2708. The results of an experiment to propagate laser-generated plasma jets into an ambient medium are presented. The jets are generated via laser irradiation of a foam-filled cone target, the results and characterization of which have been reported previously [Loupias et al., Phys. Rev. Lett. 99, 265001 (2007)] for propagation in vacuum. The introduction of an ambient medium of argon at varying density is seen to result in the formation of a shock wave, and the shock front displays perturbations that appear to grow with time. The system is diagnosed with the aid of proton radiography, imaging the perturbed structure in the dense parts of the shock with high resolution. (10.1063/1.3431094)
  DOI : 10.1063/1.3431094
• Picosecond Short-Range Disordering in Isochorically Heated Aluminum at Solid Density
  
  • Mancic A.
  • Levy A.
  • Harmand M.
  • Nakatsutsumi M.
  • Antici P.
  • Audebert P.
  • Combis P.
  • Fourmaux S.
  • Mazevet S.
  • Peyrusse O.
  • Recoules V.
  • Renaudin P.
  • Robiche J.
  • Dorchies F.
  • Fuchs J.
  Physical Review Letters, American Physical Society, 2010, 104 (3). Using ultrafast x-ray probing, we experimentally observed a progressive loss of ordering within solid-density aluminum as the temperature raises from 300 K to >104 K. The Al sample was isochorically heated by a short (∼ps), laser-accelerated proton beam and probed by a short broadband x-ray source around the Al K edge. The loss of short-range ordering is detected through the progressive smoothing of the time-resolved x-ray absorption near-edge spectroscopy (XANES) structure. The results are compared with two different theoretical models of warm dense matter and allow us to put an upper bound on the onset of ion lattice disorder within the heated solid-density medium of ∼10 ps. (10.1103/PhysRevLett.104.035002)
  DOI : 10.1103/PhysRevLett.104.035002
• Fast electron propagation in high-density plasmas created by 1D shock wave compression: experiments and simulations
  
  • Santos J. J.
  • Batani D.
  • Mckenna P.
  • Baton S. D.
  • Dorchies F.
  • Dubrouil A.
  • Fourment C.
  • Hulin S.
  • d'Humieres E.
  • Nicolai Ph
  • Gremillet L.
  • Debayle A.
  • Honrubia J. J.
  • Carpeggiani P.
  • Veltcheva M.
  • Quinn M. N.
  • Brambrink E.
  • Tikhonchuk V.
  , 2010, 244. no abstract