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29 results on '"Yahia, V."'

1. Fusion reactions initiated by laser-accelerated particle beams in a laser-produced plasma

Author

Labaune, C., Baccou, C., Depierreux, S., Goyon, C., Loisel, G., Yahia, V., and Rafelski, J.

Subjects
Physics - Plasma Physics, Nuclear Experiment, Physics - Accelerator Physics, Physics - Optics
Abstract

The advent of high-intensity pulsed laser technology enables the generation of extreme states of matter under conditions that are far from thermal equilibrium. This in turn could enable different approaches to generating energy from nuclear fusion. Relaxing the equilibrium requirement could widen the range of isotopes used in fusion fuels permitting cleaner and less hazardous reactions that do not produce high energy neutrons. Here we propose and implement a means to drive fusion reactions between protons and boron-11 nuclei, by colliding a laser-accelerated proton beam with a laser-generated boron plasma. We report proton-boron reaction rates that are orders of magnitude higher than those reported previously. Beyond fusion, our approach demonstrates a new means for exploring low-energy nuclear reactions such as those that occur in astrophysical plasmas and related environments., Comment: 7 pages, 5 figures

Published
2013
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2. Experimental study of fast electron propagation in compressed matter

Author

Vauzour, B., Santos, J.J., Batani, D., Baton, S.D., Koenig, M., Nicolaï, Ph., Perez, F., Beg, F.N., Benedetti, C., Benocci, R., Brambrink, E., Chawla, S., Coury, M., Dorchies, F., Fourment, C., Galimberti, M., Gizzi, L.A., Heathcote, R., Higginson, D.P., Honrubia, J.J., Hulin, S., Jafer, R., Jarrot, L.C., Labate, L., Lancaster, K., Köster, P., MacKinnon, A.J., McKenna, P., McPhee, A.G., Nazarov, W., Pasley, J., Ramis, R., Rhee, Y., Regan, C., Ribeyre, X., Richetta, M., Serres, F., Schlenvoigt, H.-P., Schurtz, G., Sgattoni, A., Spindloe, C., Vaisseau, X., Volpe, L., and Yahia, V.

Published
2011
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3. Laser-plasma interaction physics for shock ignition

Author

Goyon C., Depierreux S., Michel D.T., Loisel G., Yahia V., Masson-Laborde P.E., Loiseau P., Hüller S., Borisenko N.G., Orekhov A., Rosmej O., Nicolaï P., Tikhonchuk V.T., and Labaune C.

Subjects
Physics, QC1-999
Abstract

In the shock ignition scheme, the ICF target is first compressed with a long (nanosecond) pulse before creating a convergent shock with a short (∼100 ps) pulse to ignite thermonuclear reactions. This short pulse is typically (∼2.1015–1016 W/cm2) above LPI (Laser Plasma Instabilities) thresholds. The plasma is in a regime where the electron temperature is expected to be very high (2–4 keV) and the laser coupling to the plasma is not well understood. Emulating LPI in the corona requires large and hot plasmas produced by high-energy lasers. We conducted experiments on the LIL (Ligne d'Integration Laser, 10 kJ at 3ω) and the LULI2000 (0.4 kJ at 2ω) facilities, to approach these conditions and study absorption and LPI produced by a high intensity beam in preformed plasmas. After introducing the main risks associated with the short pulse propagation, we present the latest experiment we conducted on LPI in relevant conditions for shock ignition.

Published
2013
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4. Effects of hydrodynamics on Stimulated Brillouin Scattering in multiple plasma interaction

Author

Yahia V., Depierreux S., Goyon C., Loisel G., Borisenko N.G., Masson-Laborde P.E., Orekhov A., Rienecker T., Rosmej O., and Labaune C.

Subjects
Physics, QC1-999
Abstract

In this paper, an experiment carried out on LULI2000 facility is presented. It was designed to investigate how two successive plasmas interact through hydrodynamic coupling and electromagnetic radiations. Contributions of both effects have been successfully identified and the effects of hydrodynamic coupling on Stimulated Brillouin Scattering has been observed.

Published
2013
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5. Laser plasma interaction physics on the LIL facility

Author

Masson-Laborde P.-E., Depierreux S., Michel D.T., Hüller S., Pesme D., Robiche J., Loiseau P., Tikhonchuk V.T., Stenz C., Nicolaï P., Casanova M., Teychenne D., Marion D., Goyon C., Yahia V., Riconda C., Borisenko N.G., Nazarov W., Wrobel R., and Labaune C.

Subjects
Physics, QC1-999
Abstract

We present an overview of the interpretation of laser plasma interaction (LPI) experiments carried out on the LIL facility. These multikilojoule experiments have been done using underdense foam targets at 0.351 μm laser light leading to high temperature and large plasmas. We discuss the interpretation using our different numerical tools: hydrodynamics simulations carried out with the code FCI2 to characterize the plasma, linear gain estimates with the postprocessor Piranah and paraxial simulations with the code HERA.

Published
2013
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6. Study on a compact and adaptable Thomson Spectrometer for laser-initiated11B(p,α)8Be reactions and low-medium energy particle detection

Author

Consoli, F., primary, Angelis, R. De, additional, Bonasera, A., additional, Sura, J., additional, Andreoli, P., additional, Cristofari, G., additional, Cipriani, M., additional, Giorgio, G. Di, additional, Ingenito, F., additional, Barbarino, M., additional, Labaune, C., additional, Baccou, C., additional, Depierreux, S., additional, Goyon, C., additional, and Yahia, V., additional

Published
2016
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11. 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

12. 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

13. 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

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

Author

Vauzour, B., primary, Debayle, A., additional, Vaisseau, X., additional, Hulin, S., additional, Schlenvoigt, H.-P., additional, Batani, D., additional, Baton, S. D., additional, Honrubia, J. J., additional, Nicolaï, Ph., additional, Beg, F. N., additional, Benocci, R., additional, Chawla, S., additional, Coury, M., additional, Dorchies, F., additional, Fourment, C., additional, d'Humières, E., additional, Jarrot, L. C., additional, McKenna, P., additional, Rhee, Y. J., additional, Tikhonchuk, V. T., additional, Volpe, L., additional, Yahia, V., additional, and Santos, J. J., additional

Published
2014
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18. Relativistic High-Current Electron-Beam Stopping-Power Characterization in Solids and Plasmas: Collisional Versus Resistive Effects

Author

Vauzour, B., primary, Santos, J. J., additional, Debayle, A., additional, Hulin, S., additional, Schlenvoigt, H.-P., additional, Vaisseau, X., additional, Batani, D., additional, Baton, S. D., additional, Honrubia, J. J., additional, Nicolaï, Ph., additional, Beg, F. N., additional, Benocci, R., additional, Chawla, S., additional, Coury, M., additional, Dorchies, F., additional, Fourment, C., additional, d’Humières, E., additional, Jarrot, L. C., additional, McKenna, P., additional, Rhee, Y. J., additional, Tikhonchuk, V. T., additional, Volpe, L., additional, and Yahia, V., additional

Published
2012
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20. Interaction physics for the shock ignition scheme of inertial confinement fusion targets

Author

Depierreux, S, primary, Goyon, C, additional, Lewis, K, additional, Bandulet, H, additional, Michel, D T, additional, Loisel, G, additional, Yahia, V, additional, Tassin, V, additional, Stenz, C, additional, Borisenko, N G, additional, Nazarov, W, additional, Limpouch, J, additional, Masson Laborde, P E, additional, Loiseau, P, additional, Casanova, M, additional, Nicolaï, Ph, additional, Hüller, S, additional, Pesme, D, additional, Riconda, C, additional, Tikhonchuk, V T, additional, and Labaune, C, additional

Published
2011
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21. 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

23. 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

24. 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

25. 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

26. Joule-class sub-nanosecond pulses produced by end-pumped direct bonded YAG/sapphire modular amplifier.

Author

Yahia V, Kausas A, Tsuji A, Yoshida M, and Taira T

Abstract

A Joule-class room-temperature diode-pumped solid-state laser was developed. The energy scaling of the 100 mJ 1064 nm seed pulse was realized by a series of two diode-pumped amplifiers. The gain medium consists in free combinations of Nd:YAG ceramics bonded to sapphire transparent heat sinks, to relax the thermal load induced by the 34 kW pump power. At low repetition rate, parasitic lasing was the main limitation to energy scaling. By choosing a gain module combination producing a step-like gradual doping concentration profile, mitigation of parasitic oscillations was observed, and the system delivered 2.8 J, 800 ps pulses at 2 Hz.

Published
2024
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27. High peak-power near-MW laser pulses by third harmonic generation at 355 nm in Ca 5 (BO 3 ) 3 F nonlinear single crystals.

Author

Cassouret F, Kausas A, Yahia V, Aka G, Loiseau P, and Taira T

Abstract

In this work, the performance of Ca 5 (BO 3 ) 3 F (CBF) single crystals was investigated for the third harmonic generation at 355 nm. A high energy conversion efficiency of 16.9% at 355 nm was reached using a two-conversion-stage setup. First, using a high peak power, passively Q-switched Nd 3+ :YAG/Cr 4+ :YAG microlaser based gain aperture in micro-MOPA, the second harmonic at 532 nm was achieved with lithium triborate (LBO) crystal, reaching 1.35 MW peak power. On a second step, laser pulses at 355 nm were generated using a 5 mm-long CBF crystal growth by TSSG method with energy, pulse duration and peak power of 479 µJ, 568 ps and 0.843 MW, respectively. These results are currently the highest reported for CBF material.

Published
2020
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28. 100 Hz operation in 10 PW/sr·cm 2 class Nd:YAG Micro-MOPA.

Author

Kawasaki T, Yahia V, and Taira T

Abstract

An Nd:YAG Micro-MOPA, based on a microchip master oscillator and power amplifier system with gain aperture beam cleaning, could generate sub-ns 200 mJ pulses with extremely high brightness of 18 PW/sr·cm 2 [Opt. Express268609 (2018)]. However, the system repetition rate was limited to 10 Hz, due to thermal problems occurring in the main amplifier rod under high-power operation. In this work, we achieved 100 Hz operation with pulse brightness of 11 PW/sr·cm 2 by optical compensation of thermal lensing, which was evaluated through calculations and an experiment.

Published
2019
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29. High brightness energetic pulses delivered by compact microchip-MOPA system.

Author

Yahia V and Taira T

Abstract

High brightness compact microchip-seeded MOPA system was realized. Implementing a microchip preamplifier stage acting as gain aperture element lead to excellent output beam quality with M 2 = 1.4. At maximum amplification level, 235 mJ (0.4 GW) of output energy (power) was measured. Analysis of the effect of the preamplifier showed that this element increases the available beam intensity by two orders of magnitude without significant increase in system footprint. Final beam brightness was 18 PW/sr.cm 2 .

Published
2018
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