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Your search keyword '"GREMILLET, L."' showing total 8 results
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8 results on '"GREMILLET, L."'

1. Parametric study on ion acceleration from the interaction of ultra-high intensity laser pulses with near-critical density gas targets

Author

Ospina-Bohórquez, V., Debayle, A., Santos, J. J., Volpe, L., and Gremillet, L.

Subjects
Plasma Physics (physics.plasm-ph), FOS: Physical sciences, Physics - Plasma Physics
Abstract

We present a parametric study based on 1-D particle-in-cell (PIC) simulations conducted with the objective of understanding the interaction of intense lasers with near-critical non-uniform density gas targets. Specifically, we aim to find an optimal set of experimental parameters regarding the interaction of a $\lambda_L$ = 0.8 $\mu$m, $I_L =10^{20}$ W/cm$^2$ ($a_0 = 8.8$), $\tau_L = 30$ fs laser pulse with a near-critical non-uniform pure nitrogen gas profile produced by a non commercial gas nozzle. The PIC code Calder developed at CEA was used, and both the maximum electron density and the direct laser contribution to ion acceleration were studied. Shock formation was achieved for a peak electron density $n_e$ ranging between 0.35 $n_c$ and 0.7 $n_c$. In this density interval, the survival of a percentage of the laser pulse until the gas density peak, while being strongly absorbed ($>$90$\%$) and creating a hot electron population in the gas up-ramp, is singled out as a necessary condition for shock formation. Moreover, the laser absorption must give rise to a super ponderomotive heating of the target electrons in order to launch an electrostatic shock inside the plasma. The direct laser effect on ion acceleration consists in a strong initial density perturbation that enhances charge separation while the electron pressure gradients are identified as fundamental for shock formation. The production of a controlled and repetitive gas profile as well as the possibility of performing measurements with statistical meaning are highlighted as fundamental for conducting a thorough experimental study., Comment: 14 pages, 13 figures

Published
2022
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2. Weibel instability-mediated collisionless shocks in laser-irradiated dense plasmas:Prevailing role of the electrons in the turbulence generation

Author

Ruyer, C., Gremillet, L., and Bonnaud, G.

Subjects
Plasma Physics (physics.plasm-ph), High Energy Astrophysical Phenomena (astro-ph.HE), Physics::Plasma Physics, Physics::Space Physics, FOS: Physical sciences, Astrophysics - High Energy Astrophysical Phenomena, Physics - Plasma Physics
Abstract

We present a particle-in-cell simulation of the generation of a collisionless turbulent shock in a dense plasma driven by an ultra-high-intensity laser pulse. From the linear analysis, we highlight the crucial role of the laser-heated and return-current electrons in triggering a strong Weibel-like instability, giving rise to a magnetic turbulence able to isotropize the target ions., Comment: Submitted to Phys. Plasmas in February 2015

Published
2015
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3. Experimental characterization of fast electron stopping power in dense media ranging from solid to warm and dense matter

Author

Santos, J. J., Hulin, S., Vauzour, B., Vaisseau, X., Batani, D., Bouilleaud, R., Deneuville, F., Dorchies, F., Feugeas, J. -L, Fourment, C., D Humières, E., Nicolai, Ph, Tikhonchuk, V. T., Michael Touati, Debayle, A., Honrubia, J. J., Gremillet, L., Ceccotti, T., Floquet, V., Benocci, R., Morace, A., Veltcheva, M., Volpe, L., Baton, S. D., Pérez, F., Schlenvoigt, H. -P, Yahia, V., Beg, F. N., Chawla, S., Jarrot, L. C., Peebles, J., Sawada, H., Sorokovikova, A., Wei, M., Fedosejevs, R., Kerr, S., Coury, M., Gray, R., Mckenna, P., Li, K., Davies, J. R., Rhee, Y., Mclean, H., Patel, P., Santos, J, Hulin, S, Vauzour, B, Vaisseau, X, Batani, D, Bouilleaud, R, Deneuville, F, Dorchies, F, Feugeas, J, Fourment, C, D'Humieres, E, Nicolai, P, Tikhonchuk, V, Touati, M, Debayle, A, Honrubia, J, Gremillet, L, Ceccotti, T, Floquet, V, Benocci, R, Morace, A, Veltcheva, M, Volpe, L, Baton, S, Perez, F, Schlenvoigt, H, Yahia, V, Beg, F, Chawla, S, Jarrot, L, Peebles, J, Sawada, H, Sorokovikova, A, Wei, M, Fedosejevs, R, Kerr, S, Coury, M, Gray, R, Mckenna, P, Li, K, Davies, J, Rhee, Y, Mclean, H, and Patel, P

Subjects
Electron stopping power, warm dense matter

6. Studies of electron transport and isochoric heating and their applicability to fast ignition

Author

Key, M. H., Amiranoff, F., Andersen, C., Batani, D., Baton, S. D., Cowan, T., Fisch, N., Freeman, R., Gremillet, L., Hall, T., Hatchett, S., Hill, J., King, J., Kodama, R., Koch, J., Koenig, M., Lasinski, B., Langdon, B., Mackinnon, A., Martinolli, E., Norreys, P., Parks, P., Perelli-Cippo, E., Rabec Le Gloahec, M., Rosenbluth, M., Rousseaux, C., Santon, J. J., Scianitti, F., Snavely, R., Tabak, M., Tanaka, K., Town, R., Tsutumi, T., and Richard Stephens

Abstract

Experimental measurements of electron transport and isochoric heating in 100 J, 1 ps laser irradiation of solid Al targets are presented. Modeling with a hybrid PIC code is compared with the data and good agreement is obtained using a heuristic model for the electron injection. The relevance for fast ignition is discussed.

7. Magnetically Guided Fast Electrons in Cylindrically Compressed Matter

Author

Drew Higginson, Andrew MacPhee, Wigen Nazarov, John Pasley, S. Chawla, M. Koenig, Farhat Beg, Ph. Nicolaï, Tommaso Vinci, Joao Santos, Fabien Dorchies, Arnaud Debayle, S. D. Baton, Rashida Jafer, S. Hulin, B. Vauzour, Carlo Benedetti, L. Labate, R. Heathcote, F. Perez, C. Fourment, Marco Galimberti, J. J. Honrubia, D. Batani, Petra Koester, L. Gremillet, A. J. Mackinnon, Andrea Sgattoni, Maria Richetta, Luca Volpe, Rafael Ramis, Kate Lancaster, Erik Brambrink, L. A. Gizzi, C. Spindloe, Critical Care Department, Hospital de Sabadell, CIBER Enfermedades Respiratorias, Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire pour l'utilisation des lasers intenses (LULI), Université Pierre et Marie Curie - Paris 6 (UPMC)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Dipartimento di Fisica 'Giuseppe Occhialini' = Department of Physics 'Giuseppe Occhialini' [Milano-Bicocca], Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB), International Institute of Clinical Studies, Laboratoire des matériaux avancés (LMA), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Intense Laser Irradiation Laboratory–IPCF, Area della Ricerca CNR, Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Central Laser Facility (CLF), STFC Rutherford Appleton Laboratory (RAL), Science and Technology Facilities Council (STFC)-Science and Technology Facilities Council (STFC), Pôle Fromager AOP du Massif Central, Istituto Nazionale di Ottica (INO), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), University of St Andrews [Scotland], Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Dipartimento di Energia [Milano], Politecnico di Milano [Milan] (POLIMI), Science and Technology Facilities Council (STFC), DAM Île-de-France (DAM/DIF), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Pérez, F, Debayle, A, Honrubia, J, Koenig, M, Batani, D, Baton, S, Beg, F, Benedetti, C, Brambrink, E, Chawla, S, Dorchies, F, Fourment, C, Galimberti, M, Gizzi, L, Gremillet, L, Heathcote, R, Higginson, D, Hulin, S, Jafer, R, Koester, P, Labate, L, Lancaster, K, Mackinnon, A, Macphee, A, Nazarov, W, Nicolai, P, Pasley, J, Ramis, R, Richetta, M, Santos, J, Sgattoni, A, Spindloe, C, Vauzour, B, Volpe, L, Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB), Università degli Studi di Milano-Bicocca [Milano] (UNIMIB), and Consiglio Nazionale delle Ricerche (CNR)

Subjects
[PHYS]Physics [physics], Materials science, Settore FIS/01 - Fisica Sperimentale, General Physics and Astronomy, Context (language use), Electron, Laser, 7. Clean energy, 01 natural sciences, TRANSPORT, Collimated light, 010305 fluids & plasmas, Computational physics, Magnetic field, law.invention, laser, plasmi, fusione nucleare, elettroni rapidi, Electrical resistivity and conductivity, law, 0103 physical sciences, Cathode ray, 010306 general physics, ComputingMilieux_MISCELLANEOUS, FIS/03 - FISICA DELLA MATERIA, Beam (structure)
Abstract

Fast electrons produced by a 10 ps, 160 J laser pulse through laser-compressed plastic cylinders are studied experimentally and numerically in the context of fast ignition. K(alpha)-emission images reveal a collimated or scattered electron beam depending on the initial density and the compression timing. A numerical transport model shows that implosion-driven electrical resistivity gradients induce strong magnetic fields able to guide the electrons. The good agreement with measured beam sizes provides the first experimental evidence for fast-electron magnetic collimation in laser-compressed matter.

Published
2011

8. Characterization and performance of the Apollon Short-Focal-Area facility following its commissioning at 1 PW level

Author

A. Chaleil, Jean-Luc Paillard, Y. Ayoul, A. Beluze, W. P. Yao, F. Negoita, A. Leblanc, Julien Fuchs, Xavier Davoine, V. Lelasseux, G. Qi, A. Fazzini, Fabrizio Consoli, N. Lebas, F. Perez, A. Freneaux, S. A. Pikuz, J. P. Delaneau, L. Lecherbourg, Emmanuel d'Humières, V. Horny, P.-A. Söderström, E. D. Filippov, Sophia Chen, D. Cavanna, Patrick Audebert, J. L. Dubois, M. Chabanis, F. Mathieu, Patrizio Antici, Zhi-wei Chen, Fabien Quéré, T. Ceccotti, L. Lancia, J. Albrecht, P. Forestier-Colleoni, W. Ma, M. Cuciuc, Laurent Gremillet, M. Scisciò, S. Vallières, Camille Evrard, Lucas Ranc, Shuhui Sun, Dimitris N. Papadopoulos, K. Burdonov, Luc Martin, P. Wang, Laboratoire pour l'utilisation des lasers intenses (LULI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Énergie Matériaux Télécommunications - INRS (EMT-INRS), Institut National de la Recherche Scientifique [Québec] (INRS)-Université du Québec à Montréal = University of Québec in Montréal (UQAM), Physique à Haute Intensité (PHI), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), CEA- Saclay (CEA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Horia Hulubei National Institute of Physics and Nuclear Engineering (NIPNE), IFIN-HH, Agenzia Nazionale per le nuove Tecnologie, l’energia e lo sviluppo economico sostenibile (ENEA), Centre d'Etudes Lasers Intenses et Applications (CELIA), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB), Joint Institute for High Temperatures of the RAS (JIHT), Russian Academy of Sciences [Moscow] (RAS), Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), State Key Laboratory of Nuclear Physics and Technology (SKL-NPT), Peking University [Beijing], Burdonov, Konstantin, Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire Matière sous Conditions Extrêmes (LMCE), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Italian National agency for new technologies, Energy and sustainable economic development [Frascati] (ENEA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), A.M.Obukhov Institute of Atmospheric Physics (IAP), Laboratoire Charles Fabry / Lasers, Laboratoire Charles Fabry (LCF), Institut d'Optique Graduate School (IOGS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Thales LAS France, Institut National de la Recherche Scientifique [Québec] (INRS), ANR-17-CE30-0026,PiNNaCLE,Développement d'une ligne de neutrons pulsés compacte et de haute brillance(2017), European Project: 787539,GENESIS - 10.3030/787539, European Project: 633053,H2020,EURATOM-Adhoc-2014-20,EUROfusion(2014), Burdonov, K., Fazzini, A., Lelasseux, V., Albrecht, J., Antici, P., Ayoul, Y., Beluze, A., Cavanna, D., Ceccotti, T., Chabanis, M., Chaleil, A., Chen, S. N., Chen, Z., Consoli, F., Cuciuc, M., Davoine, X., Delaneau, J. P., D'Humieres, E., Dubois, J. -L., Evrard, C., Filippov, E., Freneaux, A., Forestier-Colleoni, P., Gremillet, L., Horny, V., Lancia, L., Lecherbourg, L., Lebas, N., Leblanc, A., Ma, W., Martin, L., Negoita, F., Paillard, J. -L., Papadopoulos, D., Perez, F., Pikuz, S., Qi, G., Quere, F., Ranc, L., Soderstrom, P. -A., Scisciò, M., Sun, S., Vallieres, S., Wang, P., Yao, W., Mathieu, F., Audebert, P., and Fuchs, J.

Subjects
Nuclear and High Energy Physics, Materials science, Phase (waves), FOS: Physical sciences, QC770-798, 01 natural sciences, Electromagnetic radiation, 010305 fluids & plasmas, law.invention, [PHYS] Physics [physics], Optics, law, Nuclear and particle physics. Atomic energy. Radioactivity, 0103 physical sciences, Irradiation, Electrical and Electronic Engineering, 010306 general physics, ComputingMilieux_MISCELLANEOUS, [PHYS]Physics [physics], business.industry, Laser, Atomic and Molecular Physics, and Optics, Physics - Plasma Physics, Characterization (materials science), Intensity (physics), Plasma Physics (physics.plasm-ph), Nuclear Energy and Engineering, business, Beam (structure), Nominal power (photovoltaic)
Abstract

We present the results of the first commissioning phase of the ``short focal length'' area (SFA) of the Apollon laser facility (located in Saclay, France), which was performed with the first available laser beam (F2), scaled to a nominal power of one petawatt. Under the conditions that were tested, this beam delivered on target pulses of 10 J average energy and 24 fs duration. Several diagnostics were fielded to assess the performance of the facility. The on-target focal spot, its spatial stability, the temporal intensity profile prior to the main pulse, as well as the resulting density gradient formed at the irradiated side of solid targets, have been thoroughly characterized, with the goal of helping users design future experiments. Emissions of energetic electrons, ions, and electromagnetic radiation were recorded, showing good laser-to-target coupling efficiency and an overall performance comparable with that of similar international facilities. This will be followed in 2022 by a further commissioning stage at the multi-petawatt level.

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