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7 results on '"Yahia, V."'

1. High-power laser-induced fast electron transport in solid targets and in laser-induced shock compressed plasmas

Author

Santos, J, Batani, D, Baton, S, Debayle, A, Koenig, M, Nicolai, P, Perez, F, Vauzour, B, Beg, F, Benedetti, C, Benocci, R, Brambrink, E, Carpeggiani, P, Chawla, S, Coury, M, Dorchies, F, Dubrouil, A, Fourment, C, Galimberti, M, Gizzi, L, Gremillet, L, Heathcote, R, Higginson, D, Honrubia, J, Hulin, S, Dhumieres, E, Jafer, R, Jarrot, L, Labate, L, Lancaster, K, Koester, P, Mackinnon, A, Malka, V, Manclossi, M, Mckenna, P, Mcphee, A, Nazarov, W, Pasley, J, Quinn, M, Ramis, R, Ravasio, A, Regan, C, Rhee, Y, Ribeyre, X, Richetta, M, Schlenvoigt, H, Schurtz, G, Sgattoni, A, Tikhonchuk, V, Vaisseau, X, Veltcheva, M, Volpe, L, and Yahia, V

Subjects
Settore FIS/01 - Fisica Sperimentale
Published
2010

2. Magnetically-guided fast electrons in cylindrically-compressed matter

Author

Vauzour, B, Santos, Jj, Batani, D, Baton, S, Koenig, M, Nicolai, P, Perez, F, Beg, F, Benedetti, C, Benocci, R, Brambrink, E, Chawla, S, Coury, M, Dorchies, F, Fourment, C, Galimberti, M, Gizzi, L, Heathcote, R, Higginson, D, Honrubia, J, Hulin, S, Jafer, R, Jarrot, L, Labate, L, Lancaster, K, Koester, P, Mackinnon, A, Mckenna, P, Mcphee, Ag, Nazarov, W, Pasdley, J, Ramis, R, Rhee, Y, Regan, C, Ribeyre, X, Richetta, M, Serres, F, Schlenvoigt, Hp, Schurtz, G, Scgattoni, A, Splindoe, C, Vaissea, X, Volpe, L, and Yahia, V

Subjects
Settore FIS/01 - Fisica Sperimentale
Published
2010

3. Experiments on fast electron generation in laser-induced shock compressed plasmas performed in the framework of the hiper project

Author

Batani, D, Santos, J, Baton, S, Koenig, M, Nicolai, P, Perez, F, Vauzour, B, Beg, Fn, Benedetti, C, Benocci, R, Bambrink, E, Carpeggiani, P, Chawla, S, Coury, M, Debayle, A, Dorchies, F, Dubrouil, A, Fourment, C, Galimberti, M, Gizzi, La, Gremillet, L, Heathcot, R, Higginson, Dp, Honrubia, Jj, Hulin, S, Dumieres, E, Huret, L, Jafer, R, Leconte, L, Koester, P, Mackinnon, Aj, Mckenna, P, A. G., Nazarov, W, Pasley, J, Quinn, Mn, Ramis, R, Rhee, Y, Rabec Le Glohaec, M, Ravasio, A, Regan, C, Ribeyre, X, Richetta, M, Serres, F, Schlevoigt, Hp, Schurtz, G, Sgattoni, A, Spindloe, C, Tikhonchuk, Vt, Tolley, M, Vaisseau, X, Veltcheva, M, Volpe, L, and Yahia, V

Subjects
Settore FIS/01 - Fisica Sperimentale
Published
2010

4. 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

5. Unraveling resistive versus collisional contributions to relativistic electron beam stopping power in cold-solid and in warm-dense plasmas

Author

J. J. Santos, M. Coury, Arnaud Debayle, V. Yahia, B. Vauzour, L. C. Jarrot, S. Chawla, Luca Volpe, Fabien Dorchies, C. Fourment, Paul McKenna, D. Batani, X. Vaisseau, Farhat Beg, Roberto Benocci, S. Hulin, Hans-Peter Schlenvoigt, J. J. Honrubia, V. T. Tikhonchuk, Ph. Nicolaï, S. D. Baton, Emmanuel d'Humières, Yong-Joo Rhee, 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), Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-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), GIFI, Universidad Politécnica, Madrid, Spain, affiliation inconnue, Dipartimento di Fisica 'Giuseppe Occhialini' = Department of Physics 'Giuseppe Occhialini' [Milano-Bicocca], Università degli Studi di Milano-Bicocca [Milano] (UNIMIB), International Institute of Clinical Studies, Department of Physical Education and Sport Sciences, Stanford University, Universidade de São Paulo (USP), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB), Universidade de São Paulo = University of São Paulo (USP), Vauzour, B, Debayle, A, Vaisseau, X, Hulin, S, Schlenvoigt, H, Batani, D, Baton, S, Honrubia, J, Nicolai, P, Beg, F, Benocci, R, Chawla, S, Coury, M, Dorchies, F, Fourment, C, D'Humieres, E, Jarrot, L, Mckenna, P, Rhee, Y, Tikhonchuk, V, Volpe, L, Yahia, V, and Santos, J

Subjects
Physics, [PHYS]Physics [physics], Resistive touchscreen, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Electron, Plasma, Stopping power, Condensed Matter Physics, fast electrons acceleration, laser-induced shock, Relativistic electron beam, Plasma diagnostics, Atomic physics, Current density, Inertial confinement fusion, QC
Abstract

We present results on laser-driven relativistic electron beam propagation through aluminum samples, which are either solid and cold or compressed and heated by laser-induced shock. A full numerical description of fast electron generation and transport is found to reproduce the experimental absolute K-alpha yield and spot size measurements for varying target thicknesses, and to sequentially quantify the collisional and resistive electron stopping powers. The results demonstrate that both stopping mechanisms are enhanced in compressed Al samples and are attributed to the increase in the medium density and resistivity, respectively. For the achieved time-and space-averaged electronic current density, < j(h)> similar to 8 x 10(10) A/cm(2) in the samples, the collisional and resistive stopping powers in warm and compressed Al are estimated to be 1.5 keV/mu m and 0.8 keV/mu m, respectively. By contrast, for cold and solid Al, the corresponding estimated values are 1.1 keV/mu m and 0.6 keV/mu m. Prospective numerical simulations involving higher j(h) show that the resistive stopping power can reach the same level as the collisional one. In addition to the effects of compression, the effect of the transient behavior of the resistivity of Al during relativistic electron beam transport becomes progressively more dominant, and for a significantly high current density, j(h) similar to 10(12) A/cm(2), cancels the difference in the electron resistive stopping power (or the total stopping power in units of areal density) between solid and compressed samples. Analytical calculations extend the analysis up to j(h) = 10(14) A/cm(2) (representative of the full-scale fast ignition scenario of inertial confinement fusion), where a very rapid transition to the Spitzer resistivity regime saturates the resistive stopping power, averaged over the electron beam duration, to values of similar to 1 keV/mu m. (C) 2014 AIP Publishing LLC.

Published
2014

6. Relativistic high-current electron-beam stopping-power characterization in solids and plasmas: collisional versus resistive effects

Author

Dimitri Batani, Joao Santos, Paul McKenna, Ph. Nicolaï, V. Yahia, L. C. Jarrot, Roberto Benocci, S. Hulin, Farhat Beg, S. D. Baton, Vladimir Tikhonchuk, Hans-Peter Schlenvoigt, Fabien Dorchies, Yongjoo Rhee, Emmanuel d'Humières, A. Debayle, B. Vauzour, C. Fourment, J. J. Honrubia, S. Chawla, X. Vaisseau, Luca Volpe, M. Coury, 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), Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), 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), Pôle Fromager AOP du Massif Central, Dipartimento di Fisica 'Giuseppe Occhialini' = Department of Physics 'Giuseppe Occhialini' [Milano-Bicocca], Università degli Studi di Milano-Bicocca [Milano] (UNIMIB), 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), GIFI, Universidad Politécnica, Madrid, Spain, affiliation inconnue, International Institute of Clinical Studies, SUPA, Department of Physics (SUPA), University of Strathclyde [Glasgow], Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB), Vauzour, B, Santos, J, Debayle, A, Hulin, S, Hschlenvoigt, H, Vaisseau, X, Batani, D, Baton, S, Honrubia, J, Nicolaï, P, Beg, F, Benocci, R, Chawla, S, Coury, M, Dorchies, F, Fourment, C, D'Humières, E, Jarrot, L, Mckenna, P, Rhee, Y, Tikhonchuk, V, Volpe, L, and Yahia, V

Subjects
[PHYS]Physics [physics], Nuclear reaction, Physics, Resistive touchscreen, General Physics and Astronomy, Física, Plasma, Electron, Stopping power, 01 natural sciences, 7. Clean energy, 010305 fluids & plasmas, laser, plasmi, fusione nucleare, elettroni rapidi, Nucleosynthesis, 0103 physical sciences, Cathode ray, Atomic physics, 010306 general physics, Inertial confinement fusion, FIS/03 - FISICA DELLA MATERIA, ComputingMilieux_MISCELLANEOUS
Abstract

International audience; We present experimental and numerical results on intense-laser-pulse-produced fast electron beams transport through aluminum samples, either solid or compressed and heated by laser-induced planar shock propagation. Thanks to absolute K-alpha yield measurements and its very good agreement with results from numerical simulations, we quantify the collisional and resistive fast electron stopping powers: for electron current densities of approximate to 8 x 10(10) A/cm(2) they reach 1.5 keV/mu m and 0.8 keV/mu m, respectively. For higher current densities up to 10(12) A/cm(2), numerical simulations show resistive and collisional energy losses at comparable levels. Analytical estimations predict the resistive stopping power will be kept on the level of 1 keV/mu m for electron current densities of 10(14) A/cm(2), representative of the full-scale conditions in the fast ignition of inertially confined fusion targets.

Published
2012

7. Experimental study of fast electron propagation in compressed matter

Author

F. Serres, R. Heathcote, C. Fourment, Marco Galimberti, Drew Higginson, V. Yahia, A. McPhee, P. Köster, Andrea Sgattoni, Wigen Nazarov, Kate Lancaster, B. Vauzour, J. J. Santos, Yongjoo Rhee, Carlo Benedetti, L. A. Gizzi, John Pasley, L. C. Jarrot, S. Hulin, Rafael Ramis, Xavier Ribeyre, Roberto Benocci, Guy Schurtz, Fabien Dorchies, Paul McKenna, C. Regan, S. Chawla, R. Jafer, J. J. Honrubia, F. N. Beg, Erik Brambrink, M. Coury, Hans-Peter Schlenvoigt, X. Vaisseau, F. Perez, L. Labate, A. J. Mackinnon, M. Koenig, Maria Richetta, Christopher Spindloe, Luca Volpe, Dimitri Batani, Ph. Nicolaï, S. D. Baton, International Institute of Clinical Studies, 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 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, Central Laser Facility (CLF), STFC Rutherford Appleton Laboratory (RAL), Science and Technology Facilities Council (STFC)-Science and Technology Facilities Council (STFC), Universidad Politécnica de Madrid (UPM), Pôle Fromager AOP du Massif Central, Dipartimento di Fisica 'Giuseppe Occhialini' = Department of Physics 'Giuseppe Occhialini' [Milano-Bicocca], Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB), SUPA, Department of Physics (SUPA), University of Strathclyde [Glasgow], University of St Andrews [Scotland], Istituto Nazionale di Ottica (INO), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Dipartimento di Energia [Milano], Politecnico di Milano [Milan] (POLIMI), Science and Technology Facilities Council (STFC), 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), 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), Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Critical Care Department, Hospital de Sabadell, CIBER Enfermedades Respiratorias, 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), Consiglio Nazionale delle Ricerche (CNR), Vauzour, B, Santos, J, Batani, D, Baton, S, Koenig, M, Nicolaï, P, Perez, F, Beg, F, Benedetti, C, Benocci, R, Brambrink, E, Chawla, S, Coury, M, Dorchies, F, Fourment, C, Galimberti, G, Gizzi, L, Heathcote, R, Higginson, D, Honrubia, J, Hulin, S, Jafer, R, Jarrot, L, Labate, L, Lancaster, K, Köster, P, Mackinnon, A, Mckenna, P, Mcphee, A, Nazarov, W, Pasley, J, Ramis, R, Rhee, Y, Regan, C, Ribeyre, X, Richetta, M, Serres, F, Schlenvoigt, H, Schurtz, G, Sgattoni, A, Spindloe, C, Vaisseau, X, Volpe, L, and Yahia, V

Subjects
Nuclear and High Energy Physics, proton radiography, Proton, Electron, fast ignition, 01 natural sciences, hydrodynamic simulations, 010305 fluids & plasmas, x-ray radiography, 0103 physical sciences, compression, electron transport, hydrodynamic simulations,Physics, Instrumentation, Nuclear and High Energy Physics, Cylinder, Area density, 010306 general physics, Instrumentation, ComputingMilieux_MISCELLANEOUS, Physics, [PHYS]Physics [physics], Range (particle radiation), Hydrodynamic simulation, Settore FIS/01 - Fisica Sperimentale, Plasma, Cathode ray, Atomic number, Atomic physics
Abstract

We report on experimental results of the fast electron transport in compressed plasmas, created by laser-induced shock propagation in both cylindrical and planar geometry. Two experiments were carried out. The first one was based on the compression of a polyimide cylinder filled with foams of three different initial densities (rho(0)). X-ray and proton radiographies of the target during the compression coupled with hydrodynamic simulations show that the obtained core densities and temperatures range from 2 to 11 g/cm(3) and from 30 to 120 eV, respectively. By studying the K-shell fluorescence from dopant atoms inside the target and from tracer layers situated at both front and rear side of the target it has been possible to investigate the fast electron propagation. The results show that Cu K(alpha) yield emitted by the target rear side foil decreases with increasing compression, independently of rho(0). An electron collimation can also be observed for certain experimental conditions where a convergent resistivity gradient interacts with the fast electron beam. The second experiment was performed in a planar geometry with a compressing shock counter-propagative to the fast electron beam. In this case the areal density rho z seen by the electrons is constant during the compression in such a way that changes in the fast electron range should be ascribed to collective mechanisms. The study of the K(alpha) fluorescence, from buried fluorescent layers of different atomic numbers, shows that the electrons with energy

Published
2010

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