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23 results on '"T. L. Audet"'

1. Optimization of laser-plasma injector via beam loading effects using ionization-induced injection

Author

P. Lee, G. Maynard, T. L. Audet, B. Cros, R. Lehe, and J.-L. Vay

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Simulations of ionization-induced injection in a laser driven plasma wakefield show that high-quality electron injectors in the 50–200 MeV range can be achieved in a gas cell with a tailored density profile. Using the PIC code Warp with parameters close to existing experimental conditions, we show that the concentration of N_{2} in a hydrogen plasma with a tailored density profile is an efficient parameter to tune electron beam properties through the control of the interplay between beam loading effects and varying accelerating field in the density profile. For a given laser plasma configuration, with moderate normalized laser amplitude, a_{0}=1.6 and maximum electron plasma density, n_{e0}=4×10^{18} cm^{-3}, the optimum concentration results in a robust configuration to generate electrons at 150 MeV with a rms energy spread of 4% and a spectral charge density of 1.8 pC/MeV.

Published
2018
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2. Dynamics of electron injection and acceleration driven by laser wakefield in tailored density profiles

Author

P. Lee, G. Maynard, T. L. Audet, B. Cros, R. Lehe, and J.-L. Vay

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

The dynamics of electron acceleration driven by laser wakefield is studied in detail using the particle-in-cell code WARP with the objective to generate high-quality electron bunches with narrow energy spread and small emittance, relevant for the electron injector of a multistage accelerator. Simulation results, using experimentally achievable parameters, show that electron bunches with an energy spread of ∼11% can be obtained by using an ionization-induced injection mechanism in a mm-scale length plasma. By controlling the focusing of a moderate laser power and tailoring the longitudinal plasma density profile, the electron injection beginning and end positions can be adjusted, while the electron energy can be finely tuned in the last acceleration section.

Published
2016
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3. Enhanced stability of laser wakefield acceleration using dielectric capillary tubes

Author

M. Hansson, L. Senje, A. Persson, O. Lundh, C.-G. Wahlström, F. G. Desforges, J. Ju, T. L. Audet, B. Cros, S. Dobosz Dufrénoy, and P. Monot

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

The stability of beams of laser wakefield accelerated electrons in dielectric capillary tubes is experimentally investigated. These beams are found to be more stable in charge and pointing than the corresponding beams of electrons accelerated in a gas jet. Electron beams with an average charge of 43 pC and a standard deviation of 14% are generated. The fluctuations in charge are partly correlated to fluctuations in laser pulse energy. The pointing scatter of the electron beams is measured to be as low as 0.8 mrad (rms). High laser beam pointing stability improved the stability of the electron beams.

Published
2014
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4. Effects of the dopant concentration in laser wakefield and direct laser acceleration of electrons

Author

I Gallardo González, H Ekerfelt, M Hansson, T L Audet, B Aurand, F G Desforges, S Dobosz Dufrénoy, A Persson, X Davoine, C-G Wahlström, B Cros, and O Lundh

Subjects
laser–plasma interaction, laser wakefield acceleration, direct laser acceleration, ionization-induced trapping, Science, Physics, QC1-999
Abstract

In this work, we experimentally study the effects of the nitrogen concentration in laser wakefield acceleration of electrons in a gas mixture of hydrogen and nitrogen. A 15 TW peak power laser pulse is focused to ionize the gas, excite a plasma wave and accelerate electrons up to 230 MeV. We find that at dopant concentrations above 2% the total divergence of the electrons is increased and the high energy electrons are emitted preferentially with an angle of ±6 mrad, leading to a forked spatio-spectral distribution associated to direct laser acceleration (DLA). However, electrons can gain more energy and have a divergence lower than 4 mrad for concentrations below 0.5% and the same laser and plasma conditions. Particle-in-cell simulations show that for dopant concentrations above 2%, the amount of trapped charge is large enough to significantly perturb the plasma wave, reducing the amplitude of the longitudinal wakefield and suppressing other trapping mechanisms. At high concentrations the number of trapped electrons overlapping with the laser fields is increased, which rises the amount of charge affected by DLA. We conclude that the dopant concentration affects the quantity of electrons that experience significant DLA and the beam loading of the plasma wave driven by the laser pulse. These two mechanisms influence the electrons final energy, and thus the dopant concentration should be considered as a factor for the optimization of the electron beam parameters.

Published
2018
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5. EuPRAXIA conceptual design report

Author

Ke Wang, A. Y. Molodozhentsev, L. Boulton, Barbara Marchetti, Maria Weikum, Giuseppe Dattoli, Ulrich Schramm, P. Delinikolas, Victor Malka, T. L. Audet, Anna Giribono, Cristina Vaccarezza, Erik Bründermann, Marco Bellaveglia, Fernando Brandi, Vladimir Shpakov, F. Massimo, Dimitris N. Papadopoulos, D. Ullmann, Manuel Kirchen, Christophe Simon-Boisson, Axel Bernhard, Luca Piersanti, Marco Galimberti, Masaki Kando, Federico Nguyen, Suming Weng, Dario Giove, Thomas M. Spinka, Barbara Patrizi, A. Ghigo, R. Pattathil, M. A. Pocsai, Arie Irman, A. Chancé, Y. Zhao, Hao Zhang, Zulfikar Najmudin, Vladimir Litvinenko, Fabrice Marteau, G. Kirwan, U. Rotundo, Florian Grüner, L. O. Silva, F. Falcoz, Joana Luis Martins, D. Alesini, D. Khikhlukha, Francesco Iungo, Z. Mazzotta, Angelo Biagioni, A. F. Habib, Wim Leemans, S. Jaster-Merz, Alessandro Vannozzi, Leonida A. Gizzi, Fabien Briquez, S. Bartocci, Petra Koester, Tamina Akhter, Phu Anh Phi Nghiem, G. C. Bussolino, Jorge Vieira, Adolfo Esposito, D. Di Giovenale, Jens Osterhoff, Sergio Cantarella, Kristjan Poder, Bernhard Holzer, Nicolas Delerue, Brigitte Cros, Fabio Villa, Igor Andriyash, Alessandro Stecchi, Paul Crump, Sally Wiggins, Constantin Haefner, A. Del Dotto, Oscar Jakobsson, Alessandro Gallo, Emily Sistrunk, G. Di Pirro, Olena Kononenko, Yang Li, P. Campana, A. Martinez de la Ossa, Anke-Susanne Müller, Christoph Lechner, Brendan A. Reagan, Stuart Mangles, Andrew Sutherland, D. Kocon, E. N. Svystun, Simon M. Hooker, Ruggero Ricci, Javier Resta-López, C. D. Murphy, R. Walczak, Dino A. Jaroszynski, M. Yabashi, Chan Joshi, P. Santangelo, Maria Pia Anania, Konstantin Kruchinin, C. Simon, M. Hübner, C. A. Lindstrøm, Markus Büscher, Ulrich Dorda, J. Wolfenden, Alvin C. Erlandson, G. Korn, Sergey Mironov, Alessandro Rossi, Carl Schroeder, Zheng-Ming Sheng, Olle Lundh, T. Silva, Lucas Schaper, A. Ferran Pousa, M. Del Franco, Audrey Beluze, M. H. Bussmann, Alberto Marocchino, Gilles Maynard, Min Chen, Andrea Mostacci, Alexander Knetsch, Renato Fedele, M. Rossetti Conti, Amin Ghaith, G. Costa, R. Brinkmann, Gaetano Fiore, Claes-Göran Wahlström, J. Fils, Luca Serafini, Fabrizio Bisesto, J. Cowley, X. Li, Andreas Lehrach, Augusto Marcelli, Vittoria Petrillo, M. Ibison, Antonio Falone, A. Beck, Bruno Buonomo, D. Oumbarek Espinos, Daria Pugacheva, Stefan Karsch, A. Beaton, A. Nutter, Carsten Welsch, F. Mathieu, Christophe Szwaj, R. Fiorito, Paul Scherkl, C. Le Blanc, Arie Zigler, J. Scifo, Malte C. Kaluza, Craig W. Siders, Angelo Stella, Mathieu Valléau, Ujjwal Sinha, M. J. V. Streeter, A. Welsch, Efim A. Khazanov, Eléonore Roussel, Gianluca Sarri, Lucia Sabbatini, Silvia Morante, T. Heinemann, A. Aschikhin, G. Di Raddo, L. Pribyl, S. Romeo, Alberto Bacci, N. E. Andreev, Matteo Vannini, A. Bonatto, Francesco Filippi, Klaus Ertel, Riccardo Pompili, Ricardo Fonseca, Olivier Marcouillé, E. Di Pasquale, Jason Cole, M. Artioli, R. D'Arcy, Giovanni Franzini, Marco Diomede, Andreas Maier, I. Kostyukov, A. Specka, Serge Bielawski, Wei Lu, F. Cioeta, A. Mosnier, Grace Manahan, S. Vescovi, Alessandro Cianchi, P. Niknejadi, Francesco Stellato, Luigi Pellegrino, Oliver Karger, A. Helm, Bernhard Hidding, Paolo Tomassini, J. A. Clarke, A. Petralia, Davide Terzani, Enrica Chiadroni, Ralph Assmann, Alexandra Alexandrova, Paul Mason, R. Rossmanith, Jun Zhu, Thomas C. Galvin, R. Torres, Agustin Lifschitz, M. E. Couprie, Massimo Ferrario, F. Brottier, S. De Nicola, Kevin Cassou, Tomonao Hosokai, Andy J. Bayramian, J. L. Paillard, Gabriele Tauscher, P. A. Walker, Geetanjali Sharma, P. Lee, Guido Toci, Farzad Jafarinia, Simona Incremona, Imre Ferenc Barna, Charles Kitegi, D. R. Symes, M. Croia, Vladyslav Libov, J. M. Dias, Guoxing Xia, L. Labate, Assmann, R. W., Weikum, M. K., Akhter, T., Alesini, D., Alexandrova, A. S., Anania, M. P., Andreev, N. E., Andriyash, I., Artioli, M., Aschikhin, A., Audet, T., Bacci, A., Barna, I. F., Bartocci, S., Bayramian, A., Beaton, A., Beck, A., Bellaveglia, M., Beluze, A., Bernhard, A., Biagioni, A., Bielawski, S., Bisesto, F. G., Bonatto, A., Boulton, L., Brandi, F., Brinkmann, R., Briquez, F., Brottier, F., Brundermann, E., Buscher, M., Buonomo, B., Bussmann, M. H., Bussolino, G., Campana, P., Cantarella, S., Cassou, K., Chance, A., Chen, M., Chiadroni, E., Cianchi, A., Cioeta, F., Clarke, J. A., Cole, J. M., Costa, G., Couprie, M. -E., Cowley, J., Croia, M., Cros, B., Crump, P. A., D'Arcy, R., Dattoli, G., Del Dotto, A., Delerue, N., Del Franco, M., Delinikolas, P., De Nicola, S., Dias, J. M., Di Giovenale, D., Diomede, M., Di Pasquale, E., Di Pirro, G., Di Raddo, G., Dorda, U., Erlandson, A. C., Ertel, K., Esposito, A., Falcoz, F., Falone, A., Fedele, R., Ferran Pousa, A., Ferrario, M., Filippi, F., Fils, J., Fiore, G., Fiorito, R., Fonseca, R. A., Franzini, G., Galimberti, M., Gallo, A., Galvin, T. C., Ghaith, A., Ghigo, A., Giove, D., Giribono, A., Gizzi, L. A., Gruner, F. J., Habib, A. F., Haefner, C., Heinemann, T., Helm, A., Hidding, B., Holzer, B. J., Hooker, S. M., Hosokai, T., Hubner, M., Ibison, M., Incremona, S., Irman, A., Iungo, F., Jafarinia, F. J., Jakobsson, O., Jaroszynski, D. A., Jaster-Merz, S., Joshi, C., Kaluza, M., Kando, M., Karger, O. S., Karsch, S., Khazanov, E., Khikhlukha, D., Kirchen, M., Kirwan, G., Kitegi, C., Knetsch, A., Kocon, D., Koester, P., Kononenko, O. S., Korn, G., Kostyukov, I., Kruchinin, K. O., Labate, L., Le Blanc, C., Lechner, C., Lee, P., Leemans, W., Lehrach, A., Li, X., Li, Y., Libov, V., Lifschitz, A., Lindstrom, C. A., Litvinenko, V., Lu, W., Lundh, O., Maier, A. R., Malka, V., Manahan, G. G., Mangles, S. P. D., Marcelli, A., Marchetti, B., Marcouille, O., Marocchino, A., Marteau, F., Martinez de la Ossa, A., Martins, J. L., Mason, P. D., Massimo, F., Mathieu, F., Maynard, G., Mazzotta, Z., Mironov, S., Molodozhentsev, A. Y., Morante, S., Mosnier, A., Mostacci, A., Muller, A. -S., Murphy, C. D., Najmudin, Z., Nghiem, P. A. P., Nguyen, F., Niknejadi, P., Nutter, A., Osterhoff, J., Oumbarek Espinos, D., Paillard, J. -L., Papadopoulos, D. N., Patrizi, B., Pattathil, R., Pellegrino, L., Petralia, A., Petrillo, V., Piersanti, L., Pocsai, M. A., Poder, K., Pompili, R., Pribyl, L., Pugacheva, D., Reagan, B. A., Resta-Lopez, J., Ricci, R., Romeo, S., Rossetti Conti, M., Rossi, A. R., Rossmanith, R., Rotundo, U., Roussel, E., Sabbatini, L., Santangelo, P., Sarri, G., Schaper, L., Scherkl, P., Schramm, U., Schroeder, C. B., Scifo, J., Serafini, L., Sharma, G., Sheng, Z. M., Shpakov, V., Siders, C. W., Silva, L. O., Silva, T., Simon, C., Simon-Boisson, C., Sinha, U., Sistrunk, E., Specka, A., Spinka, T. M., Stecchi, A., Stella, A., Stellato, F., Streeter, M. J. V., Sutherland, A., Svystun, E. N., Symes, D., Szwaj, C., Tauscher, G. E., Terzani, D., Toci, G., Tomassini, P., Torres, R., Ullmann, D., Vaccarezza, C., Valleau, M., Vannini, M., Vannozzi, A., Vescovi, S., Vieira, J. M., Villa, F., Wahlstrom, C. -G., Walczak, R., Walker, P. A., Wang, K., Welsch, A., Welsch, C. P., Weng, S. M., Wiggins, S. M., Wolfenden, J., Xia, G., Yabashi, M., Zhang, H., Zhao, Y., Zhu, J., Zigler, A., Deutsches Elektronen-Synchrotron [Hamburg] (DESY), Istituto Nazionale di Fisica Nucleare, Sezione di Napoli (INFN, Sezione di Napoli), Istituto Nazionale di Fisica Nucleare (INFN), Laboratori Nazionali di Frascati (LNF), Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Engineering & Physical Science Research Council (EPSRC), Science and Technology Facilities Council (STFC), and EuPRAXIA

Subjects
Technology, electron: energy, AMPLIFIED SPONTANEOUS-EMISSION, wake field [plasma], General Physics and Astronomy, costs, plasma: wake field, free electron laser, GeV, 01 natural sciences, 7. Clean energy, wake field [acceleration], 010305 fluids & plasmas, law.invention, Laser technology, acceleration: wake field, Conceptual design, FREE-ELECTRON LASER, AT-SPARC-LAB, law, IN-CELL CODE, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], PLASMA-WAKEFIELD ACCELERATION, General Materials Science, LATERAL SHEARING INTERFEROMETRY, media_common, Applied Physics, Settore FIS/01, 02 Physical Sciences, T1, light source, Physics, Settore FIS/07, accelerator: plasma, Schedule (project management), Physical Sciences, Systems engineering, positron, Plasma acceleration, X rays, compact accelerators, performance, WAKE-FIELD ACCELERATION, X-RAY SOURCE, Project implementation, Fluids & Plasmas, Physics, Multidisciplinary, accelerator [electron], Physics and Astronomy(all), HIGH PEAK POWER, electron: accelerator, horizon, medicine: imaging, X-ray, accelerators, Materials Science(all), 0103 physical sciences, media_common.cataloged_instance, ddc:530, European union, Physical and Theoretical Chemistry, 010306 general physics, energy [electron], 01 Mathematical Sciences, plasma: acceleration, acceleration [plasma], Electron energy, Science & Technology, imaging [medicine], plasma [accelerator], Particle accelerator, plasmas, Accelerators and Storage Rings, laser, Automatic Keywords, gamma ray, linear collider, ddc:600, CHIRPED-PULSE AMPLIFICATION
Abstract

European physical journal special topics 229(24), 3675 - 4284 (2020). doi:10.1140/epjst/e2020-000127-8, This report presents the conceptual design of a new European research infrastructure EuPRAXIA. The concept has been established over the last four years in a unique collaboration of 41 laboratories within a Horizon 2020 design study funded by the European Union. EuPRAXIA is the first European project that develops a dedicated particle accelerator research infrastructure based on novel plasma acceleration concepts and laser technology. It focuses on the development of electron accelerators and underlying technologies, their user communities, and the exploitation of existing accelerator infrastructures in Europe. EuPRAXIA has involved, amongst others, the international laser community and industry to build links and bridges with accelerator science — through realising synergies, identifying disruptive ideas, innovating, and fostering knowledge exchange. The Eu-PRAXIA project aims at the construction of an innovative electron accelerator using laser- and electron-beam-driven plasma wakefield acceleration that offers a significant reduction in size and possible savings in cost over current state-of-the-art radiofrequency-based accelerators. The foreseen electron energy range of one to five gigaelectronvolts (GeV) and its performance goals will enable versatile applications in various domains, e.g. as a compact free-electron laser (FEL), compact sources for medical imaging and positron generation, table-top test beams for particle detectors, as well as deeply penetrating X-ray and gamma-ray sources for material testing. EuPRAXIA is designed to be the required stepping stone to possible future plasma-based facilities, such as linear colliders at the high-energy physics (HEP) energy frontier. Consistent with a high-confidence approach, the project includes measures to retire risk by establishing scaled technology demonstrators. This report includes preliminary models for project implementation, cost and schedule that would allow operation of the full Eu-PRAXIA facility within 8—10 years., Published by Springer, Heidelberg

Published
2020

6. Erratum to: EuPRAXIA Conceptual Design Report – Eur. Phys. J. Special Topics 229, 3675-4284 (2020), https://doi.org/10.1140/epjst/e2020-000127-8

Author

Arie Zigler, Manuel Kirchen, Ruggero Ricci, Javier Resta-López, Eléonore Roussel, Dario Giove, A. Ghaith, Arie Irman, Vladyslav Libov, J. M. Dias, Fabio Villa, Fabrizio Bisesto, Augusto Marcelli, Bruno Buonomo, Matteo Vannini, R. Pattathil, Wim Leemans, S. Jaster-Merz, Audrey Beluze, G. C. Bussolino, Anna Giribono, Riccardo Pompili, P. Lee, Farzad Jafarinia, A. Del Dotto, Alberto Marocchino, Oscar Jakobsson, J. Scifo, R. Fiorito, Mathieu Valléau, Constantin Haefner, T. L. Audet, T. Spinka, Ujjwal Sinha, P. Santangelo, Carsten Welsch, F. Mathieu, Z. Mazzotta, Barbara Marchetti, M. A. Pocsai, Lucia Sabbatini, L. Labate, Silvia Morante, S. Romeo, Alberto Bacci, T. Heinemann, Francesco Filippi, Angelo Biagioni, A. F. Habib, D. Ullmann, Axel Bernhard, M. Artioli, Craig W. Siders, Sergio Cantarella, Alessandro Gallo, D. Kocon, C. A. Lindstrøm, Ulrich Dorda, M. Croia, Sally Wiggins, E. N. Svystun, Gabriele Tauscher, Suming Weng, Francesco Iungo, F. Massimo, Malte C. Kaluza, A. Ghigo, P. A. Walker, Fernando Brandi, Vladimir Shpakov, Anke-Susanne Müller, Ricardo Fonseca, Marie-Emmanuelle Couprie, Luca Piersanti, D. Khikhlukha, Guoxing Xia, Olle Lundh, Brendan A. Reagan, Stuart Mangles, Y. Zhao, S. Vescovi, D. Alesini, Brigitte Cros, Sergey Mironov, Andreas Lehrach, Zulfikar Najmudin, Fabrice Marteau, Oliver Karger, Kevin Cassou, Tomonao Hosokai, Markus Büscher, Vittoria Petrillo, Thomas C. Galvin, Geetanjali Sharma, C. D. Murphy, R. Walczak, Paul Crump, G. Di Pirro, Min Chen, R. Torres, A. Aschikhin, Emily Sistrunk, G. Di Raddo, Lucas Schaper, L. O. Silva, Zheng-Ming Sheng, M. Del Franco, Guido Toci, G. Kirwan, Alessandro Cianchi, Florian Grüner, M. Yabashi, Chan Joshi, Andy J. Bayramian, Marco Diomede, J. L. Paillard, Simona Incremona, Giovanni Franzini, Adolfo Esposito, D. Di Giovenale, Agustin Lifschitz, F. Falcoz, Alessandro Vannozzi, Kristjan Poder, Bernhard Holzer, Nicolas Delerue, Serge Bielawski, Olena Kononenko, Alvin C. Erlandson, G. Korn, J. Cowley, R. Brinkmann, Imre Ferenc Barna, Gaetano Fiore, Luca Serafini, Dino A. Jaroszynski, C. Simon, Enrica Chiadroni, M. Rossetti Conti, Francesco Stellato, D. Pugacheva, M. Ibison, R. Rossmanith, A. Beck, Alexandra Alexandrova, Paul Mason, Jun Zhu, Andrew Sutherland, Gianluca Sarri, Yang Li, Fabien Briquez, R. D'Arcy, Charles Kitegi, Klaus Ertel, Claes-Göran Wahlström, M. Hübner, Leonida A. Gizzi, Tamina Akhter, D. R. Symes, Stefan Karsch, A. Nutter, P. Delinikolas, J. A. Clarke, Paul Scherkl, Antonio Falone, C. Le Blanc, P. Campana, A. Martinez de la Ossa, Jason Cole, Marco Bellaveglia, G. Costa, Maria Pia Anania, Massimo Ferrario, M. J. V. Streeter, Nikolay Andreev, Konstantin Kruchinin, Ke Wang, M. H. Bussmann, Grace Manahan, Gilles Maynard, Igor Andriyash, I. Kostyukov, Dimitris N. Papadopoulos, Wei Lu, Christophe Simon-Boisson, A. Mosnier, F. Brottier, Barbara Patrizi, Alessandro Stecchi, A. Ferran Pousa, Bernhard Hidding, S. De Nicola, J. Wolfenden, Federico Nguyen, A. Y. Molodozhentsev, D. Oumbarek Espinos, Simon M. Hooker, A. Helm, Paolo Tomassini, A. Chancé, Hao Zhang, Phu Anh Phi Nghiem, A. Welsch, L. Pribyl, Christophe Szwaj, Joana Luis Martins, Maria Weikum, Efim A. Khazanov, Giuseppe Dattoli, Jens Osterhoff, A. Bonatto, S. Bartocci, Petra Koester, L. Boulton, Carl Schroeder, Angelo Stella, E. Di Pasquale, Cristina Vaccarezza, Davide Terzani, Victor Malka, P. Niknejadi, Andrea Mostacci, A. Petralia, Ralph Assmann, Christoph Lechner, U. Rotundo, Olivier Marcouillé, F. Cioeta, T. Silva, Luigi Pellegrino, J. Fils, X. Li, Jorge Vieira, Andreas Maier, A. Specka, Alessandro Rossi, Alexander Knetsch, Renato Fedele, Ulrich Schramm, Erik Bründermann, Vladimir Litvinenko, Marco Galimberti, Masaki Kando, and A. Beaton

Subjects
Technology, Applied physics, Conceptual design, Calculus, General Physics and Astronomy, General Materials Science, Physical and Theoretical Chemistry, ddc:600, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), GeneralLiterature_MISCELLANEOUS
Abstract

Figure 20.1 was not correct in the published article. The original article has been corrected. The published apologizes for the inconvenience.

Published
2020
Full Text
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7. EuPRAXIA, a Step Toward a Plasma-Wakefield Based Accelerator With High Beam Quality

Author

T. L. Audet, P. Lee, D. R. Symes, J. A. Clarke, Vladimir Shpakov, M. Croia, Gilles Maynard, A. Aschikhin, A. Ferran Pousa, Feiyu Li, R. Pattathil, Zulfikar Najmudin, A. Martinez de la Ossa, D. Alesini, Konstantin Kruchinin, Vladyslav Libov, Simon M. Hooker, Carsten Welsch, A Specka, F. Mathieu, Jun Zhu, A. Y. Molodozhentsev, T. Silva, F. Massimo, Brigitte Cros, Massimo Ferrario, X. Li, M Vujanovic, Bernhard Hidding, Ricardo Fonseca, Paolo Tomassini, M. E. Couprie, Ulrich Dorda, Giuseppe Dattoli, Amin Ghaith, Angelo Stella, Davide Terzani, E. N. Svystun, L. Labate, Ralph Assmann, Suming Weng, A. Helm, Alessandro Cianchi, Samuel R. Yoffe, L. O. Silva, Nicolas Delerue, P. A. Walker, Maria Weikum, P. Niknejadi, Federico Nguyen, Cristina Vaccarezza, A. Del Dotto, S. Romeo, A. Chancé, Enrica Chiadroni, Daniel Marx, L. A. Gizzi, Guido Toci, J. Wolfenden, Timon Mehrling, Alessandro Rossi, Jorge Vieira, Zheng-Ming Sheng, Riccardo Pompili, Sally Wiggins, Lucas Schaper, A. Mosnier, Anna Giribono, Zeudi Mazzotta, Dino A. Jaroszynski, C. Simon, M. J. V. Streeter, Barbara Marchetti, M. Ibison, Phu Anh Phi Nghiem, Andrea Mostacci, Min Chen, A. Beck, D. Oumbarek Espinos, Roman Walczak, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), 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), EuPRAXIA, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Sorbonne Université (SU)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Key Laboratory of Virtual Geographic Environment, Ministry of Education of the People’s Republic of China, Nanjing Normal University, Nanjing China, Italian National agency for new technologies, Energy and sustainable economic development [Frascati] (ENEA), Environmental and Geophysical Sciences Lab (ENGEOS Lab), Khalifa University, Istituto Nazionale di Ottica (INO), and National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR)

Subjects
History, Low emittance, Plasma parameters, Plasmas, accelerators, diagnostics, media_common.quotation_subject, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Laser particle acceleration, 7. Clean energy, 01 natural sciences, Education, Acceleration, accelerators, 0103 physical sciences, Electronic engineering, diagnostics, ddc:530, Thermal emittance, Quality (business), 010306 general physics, QC, plasma, media_common, emittance, 010308 nuclear & particles physics, European research, Plasma, acceleration, Computer Science Applications, laser, injection, Plasmas, Laser beam quality
Abstract

International audience; The EuPRAXIA project aims at designing the world’s first accelerator based on plasma-wakefield advanced technique, which can deliver a 5 GeV electron beam with simultaneously high charge, low emittance and low energy spread to user’s communities. Such challenging objectives can only have a chance to be achieved when particular efforts are dedicated to identify the subsequent issues and to find the way to solve them. Many injection/acceleration schemes and techniques have been explored by means of thorough simulations in more than ten European institutes to sort out the most appropriate ones. The specific issues of high charge, high beam quality and beam extraction then transfer to the user’s applications, have been tackled with many innovative approaches*. This article highlights the different advanced methods that have been employed by the EuPRAXIA collaboration and the preliminary results obtained. The needs in terms of laser and plasma parameters for such an accelerator are also summarized.

Published
2019

8. EuPRAXIA - A Compact, Cost-Efficient Particle and Radiation Source

Author

C. D. Murphy, Markus Büscher, Gabriele Tauscher, Malte C. Kaluza, Dino A. Jaroszynski, O. Delferrière, P. A. Walker, C. Simon, M. Hübner, Petra Koester, Bernhard Hidding, Paolo Tomassini, Arnaud Beck, F. Filippi, J. A. Clarke, Arie Irman, Daria Pugacheva, Alessandro Cianchi, Marco Galimberti, P. Gastinel, S. De Nicola, G. C. Bussolino, Paul Scherkl, M. J. V. Streeter, Enrica Chiadroni, Feiyu Li, Joana Luis Martins, Efim A. Khazanov, Masaki Kando, Barbara Marchetti, S. Romeo, Alberto Bacci, R. Rossmanith, Jason Cole, O. Kononenko, J. Scifo, Grace Manahan, P. D. Alesini, Maria Weikum, A. Ferran Pousa, Tomonao Hosokai, Gilles Maynard, A. F. Habib, J. C. Chanteloup, Jorge Vieira, Stuart Mangles, Cristina Vaccarezza, Alexandra Alexandrova, Anna Giribono, Paul Mason, Jun Zhu, N.R. Thompson, A. Lifschitz, Ujjwal Sinha, Lucas Schaper, La Gizzi, Stefan Karsch, Axel Bernhard, L. Pribyl, Ulrich Schramm, Florian Grüner, Christoph Lechner, Federico Nguyen, Andreas Maier, Timon Mehrling, F. Massimo, A. Beluze, Andreas Lehrach, A. Aschikhin, M. Yabashi, David Garzella, Erik Bründermann, T. Silva, Simon M. Hooker, Brigitte Cros, A. Chancé, Vittoria Petrillo, Aakash A. Sahai, Gaetano Fiore, Fabrizio Bisesto, Alexander Knetsch, Renato Fedele, X. Li, A. Martinez de la Ossa, Maria Pia Anania, Konstantin Kruchinin, Kristjan Poder, I. Kostyukov, Wei Lu, G. Korn, Vladimir Litvinenko, Phu Anh Phi Nghiem, Bernhard Holzer, P. Niknejadi, Nicolas Delerue, Massimo Ferrario, Gianluca Sarri, Igor Andriyash, A. Marocchino, Z. Mazzotta, N. E. Andreev, Wim Leemans, S. Jaster-Merz, Carl Schroeder, Andrea Mostacci, C. Joshi, Fabio Villa, Ralph Assmann, R. Torres, Serge Bielawski, P. P. Rajeev, Farzad Jafarinia, Dario Giove, Michael Bussmann, J. Fils, Ulrich Dorda, M. Croia, J. Schwindling, O. Bringer, Guoxing Xia, T. Akhter, D. Terzani, J. Wolfenden, D. Kocon, Carsten Welsch, M. E. Couprie, F. Mathieu, E. N. Svystun, R. Brinkmann, Claes-Göran Wahlström, Ricardo Fonseca, Oliver Karger, C. Szwaj, T. L. Audet, D. Ullmann, Anke-Susanne Müller, Min Chen, A. Gallo, A. Specka, Barbara Patrizi, Jens Osterhoff, P. Delinikolas, Luca Serafini, T. Heinemann, A. Beaton, Arie Zigler, A. Y. Molodozhentsev, Eléonore Roussel, Matteo Vannini, Riccardo Pompili, Giuseppe Dattoli, Victor Malka, M. A. Pocsai, M. Rossetti Conti, D. Khikhlukha, Fernando Brandi, Lujie Yu, Zulfikar Najmudin, Luis O. Silva, Paul Crump, Zheng-Ming Sheng, Guido Toci, Imre Ferenc Barna, D. R. Symes, Vladyslav Libov, L. Labate, Roman Walczak, Andrea Rossi, D. Papadopoulos, João Dias, K. Wang, Olle Lundh, Floyd McDaniel, Gary Glass, Barney Doyle, Arlyn Antolak and Yongqiang Wang, Weikum, M. K., Akhter, T., Alesini, P. D., Alexandrova, A. S., Anania, M. P., Andreev, N. E., Andriyash, I., Aschikhin, A., Assmann, R. W., Audet, T., Bacci, A., Barna, I. F., Beaton, A., Beck, A., Beluze, A., Bernhard, A., Bielawski, S., Bisesto, F. G., Brandi, F., Bringer, O., Brinkmann, R., Bründermann, E., Büscher, M., Bussmann, M., Bussolino, G. C., Chance, A., Chanteloup, J. C., Chen, M., Chiadroni, E., Cianchi, A., Clarke, J., Cole, J., Couprie, M. E., Croia, M., Cros, B., Crump, P., Dattoli, G., Delerue, N., Delferriere, O., Delinikolas, P., De Nicola, S., Dias, J., Dorda, U., Fedele, R., Pousa, A. Ferran, Ferrario, M., Filippi, F., Fils, J., Fiore, G., Fonseca, R. A., Galimberti, M., Gallo, A., Garzella, D., Gastinel, P., Giove, D., Giribono, A., Gizzi, L. A., Grüner, F. J., Habib, A. F., Heinemann, T., Hidding, B., Holzer, B. J., Hooker, S. M., Hosokai, T., Hübner, M., Irman, A., Jafarinia, F., Jaroszynski, D. A., Jaster-Merz, S., Joshi, C., Kaluza, M. C., Kando, M., Karger, O. S., Karsch, S., Khazanov, E., Khikhlukha, D., Knetsch, A., Kocon, D., Koester, P., Kononenko, O., Korn, G., Kostyukov, I., Kruchinin, K., Labate, L., Lechner, C., Leemans, W. P., Lehrach, A., Li, F. Y., Li, X., Libov, V., Lifschitz, A., Litvinenko, V., Lu, W., Lundh, O., Maier, A. R., Malka, V., Manahan, G. G., Mangles, S. P. D., Marchetti, B., Marocchino, A., de la Ossa, A. Martinez, Martins, J. L., Mason, P., Massimo, F., Mathieu, F., Maynard, G., Mazzotta, Z., Mehrling, T. J., Molodozhentsev, A. Y., Mostacci, A., Müller, A. S., Murphy, C. D., Najmudin, Z., Nghiem, P. A. P., Nguyen, F., Niknejadi, P., Osterhoff, J., Papadopoulos, D., Patrizi, B., Petrillo, V., Pocsai, M. A., Poder, K., Pompili, R., Pribyl, L., Pugacheva, D., Romeo, S., Rajeev, P. P., Conti, M. Rossetti, Rossi, A. R., Rossmanith, R., Roussel, E., Sahai, A. A., Sarri, G., Schaper, L., Scherkl, P., Schramm, U., Schroeder, C. B., Schwindling, J., Scifo, J., Serafini, L., Sheng, Z. M., Silva, L. O., Silva, T., Simon, C., Sinha, U., Specka, A., Streeter, M. J. V., Svystun, E. N., Symes, D., Szwaj, C., Tauscher, G., Terzani, D., Thompson, N., Toci, G., Tomassini, P., Torres, R., Ullmann, D., Vaccarezza, C., Vannini, M., Vieira, J. M., Villa, F., Wahlström, C. -G., Walczak, R., Walker, P. A., Wang, K., Welsch, C. P., Wolfenden, J., Xia, G., Yabashi, M., Yu, L., Zhu, J., Zigler, A., Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), 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), Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Département des Accélérateurs, de Cryogénie et de Magnétisme (ex SACM) (DACM), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), 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 de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Brundermann, E., Buscher, M., Pousa, A. F., Gruner, F. J., Hubner, M., De La Ossa, A. M., Muller, A. S., Conti, M. R., and Wahlstrom, C. -G.

Subjects
Cost efficiency, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Radiation, Plasma acceleration, 7. Clean energy, 01 natural sciences, Plasmas, accelerators, 010305 fluids & plasmas, Particle acceleration, Conceptual design, 13. Climate action, 0103 physical sciences, Systems engineering, Particle, ddc:530, Laser beam quality, 010306 general physics, Plasmas (physics) | Lasers | Laser wakefield, Electrical efficiency, QC
Abstract

25th International Conference on the Application of Accelerators in Research and Industry, CAARI 2018, Texas, USA, 12 Aug 2018 - 17 Aug 2018; AIP conference proceedings 2160(1), 040012-1 - 040012-9 (2019). doi:https://doi.org/10.1063/1.5127692, Plasma accelerators present one of the most suitable candidates for the development of more compact particle acceleration technologies, yet they still lag behind radiofrequency (RF)-based devices when it comes to beam quality, control, stability and power efficiency. The Horizon 2020-funded project EuPRAXIA (“European Plasma Research Accelerator with eXcellence In Applications”) aims to overcome the first three of these hurdles by developing a conceptual design for a first international user facility based on plasma acceleration. In this paper we report on the main features, simulation studies and potential applications of this future research infrastructure., Published by AIP Publishing, Melville, NY

Published
2019

9. Gas cell density characterization for laser wakefield acceleration

Author

Brigitte Cros, M. Bougeard, P. Lee, Gilles Maynard, P. Monot, S. Dobosz Dufrénoy, Antoine Maitrallain, T. L. Audet, Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), 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 de physique des gaz et des plasmas ( LPGP ), Université Paris-Sud - Paris 11 ( UP11 ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Interactions, Dynamique 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 ), and Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Accelerator Physics (physics.acc-ph), Nuclear and High Energy Physics, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], FOS: Physical sciences, Electrons, Electron, 01 natural sciences, 010305 fluids & plasmas, law.invention, Acceleration, law, 0103 physical sciences, Cell density, [ PHYS.PHYS.PHYS-GEN-PH ] Physics [physics]/Physics [physics]/General Physics [physics.gen-ph], [ PHYS.PHYS.PHYS-ACC-PH ] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], 010306 general physics, Instrumentation, Plasma density, Physics, Laser wakefield, Injector, Laser, Physics - Plasma Physics, [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph], Characterization (materials science), Computational physics, Plasma Physics (physics.plasm-ph), Density distribution, Physics::Accelerator Physics, Physics - Accelerator Physics, Gas cell
Abstract

International audience; In the design of laser plasma electron injectors for multi-stage laser driven wakefield accelerators, the control of plasma density is a key element to stabilize the acceleration process. A cell with variable parameters is used to confine the gas and tailor the density profile. The gas filling process was characterized both experimentally and by fluid simulations. Results show a good agreement between experiments and simulations. Simulations were also used to study the effect of each of the gas cell parameters on the density distribution and show the possibility to finely control the density profile.

Published
2018
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10. Transport and analysis of electron beams from a laser wakefield accelerator in the 100 MeV energy range with a dedicated magnetic line

Author

Brigitte Cros, P. Monot, A. Mosnier, O. Delferrière, J. Schwindling, Nicolas Delerue, P. Lee, S. Dobosz Dufrénoy, Gilles Maynard, Antoine Maitrallain, A. Specka, A. Chancé, T. L. Audet, 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), Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), 010308 nuclear & particles physics, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Charge density, Laser wakefield acceleration, Electron, Laser, Plasma acceleration, 01 natural sciences, 7. Clean energy, Spectrometer, law.invention, Transport line, QC350, Dipole, Bunches, law, Ionization, 0103 physical sciences, Physics::Accelerator Physics, Atomic physics, 010306 general physics, Instrumentation
Abstract

Electron bunches generated by laser driven wakefield acceleration are transported and analyzed using a magnetic line composed of a triplet of quadrupoles and a dipole. Short pulse bunches with a total charge of ≈ 130 p C, and broad band energy spectra in the range 45 to 150 M eV are generated by ionization assisted injection in a gas cell. The electron source is imaged about one meter away from the exit of the gas cell by the magnetic line, delivering electron bunches at a stable position in the image plane where a charge density of ≈ 2 . 9 p C ∕ m m 2 at an energy of 69.4 ± 0 . 6 M eV is achieved. This magnetic line improves dramatically the accuracy of energy determination of this electron source, leading to an energy error as low as 8.6‰ in the 70 M eV range for 5 m rad divergence electron bunch and considering the resolution of the entire detection system. The transport of bunches with improved stability and energy selection paves the way to various applications including multi-stage laser plasma acceleration.

Published
2018

11. Effects of the dopant concentration in laser wakefield and direct laser acceleration of electrons

Author

Martin Hansson, F. G. Desforges, Brigitte Cros, Xavier Davoine, T. L. Audet, I. Gallardo González, Anders Persson, Henrik Ekerfelt, Olle Lundh, Bastian Aurand, S. Dobosz Dufrénoy, Claes-Göran Wahlström, Lund University [Lund], Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), 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), Département de Physique Théorique et Appliquée (DPTA), 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), European Project: 284464,EC:FP7:INFRA,FP7-INFRASTRUCTURES-2011-1,LASERLAB-EUROPE(2012), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Dopant, Waves in plasmas, General Physics and Astronomy, Plasma, Electron, Laser, 7. Clean energy, 01 natural sciences, 010305 fluids & plasmas, law.invention, [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], law, Ionization, 0103 physical sciences, Cathode ray, Physics::Accelerator Physics, Atomic physics, 010306 general physics, Beam (structure)
Abstract

International audience; In this work, we experimentally study the effects of the nitrogen concentration in laser wakefield acceleration of electrons in a gas mixture of hydrogen and nitrogen. A 15 TW peak power laser pulse is focused to ionize the gas, excite a plasma wave and accelerate electrons up to 230 MeV. We find that at dopant concentrations above 2% the total divergence of the electrons is increased and the high energy electrons are emitted preferentially with an angle of ±6 mrad, leading to a forked spatio-spectral distribution associated to direct laser acceleration (DLA). However, electrons can gain more energy and have a divergence lower than 4 mrad for concentrations below 0.5% and the same laser and plasma conditions. Particle-in-cell simulations show that for dopant concentrations above 2%, the amount of trapped charge is large enough to significantly perturb the plasma wave, reducing the amplitude of the longitudinal wakefield and suppressing other trapping mechanisms. At high concentrations the number of trapped electrons overlapping with the laser fields is increased, which rises the amount of charge affected by DLA. We conclude that the dopant concentration affects the quantity of electrons that experience significant DLA and the beam loading of the plasma wave driven by the laser pulse. These two mechanisms influence the electrons final energy, and thus the dopant concentration should be considered as a factor for the optimization of the electron beam parameters.

Published
2018
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12. Investigation of the dynamics of ionization induced injected electrons under the influence of beam loading effects

Author

Remi Lehe, Brigitte Cros, T. L. Audet, Gilles Maynard, J.-L. Vay, P. Lee, Laboratoire de physique des gaz et des plasmas (LPGP), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Hydrogen, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], FOS: Physical sciences, chemistry.chemical_element, Electron, 7. Clean energy, 01 natural sciences, Atomic, 010305 fluids & plasmas, Ionization induced injection, Particle and Plasma Physics, Impurity, Ionization, physics.plasm-ph, 0103 physical sciences, Nuclear, 010306 general physics, Instrumentation, Physics, Waves in plasmas, PIC, Molecular, Nitrogen, Nuclear & Particles Physics, Physics - Plasma Physics, Plasma Physics (physics.plasm-ph), Other Physical Sciences, chemistry, Beam loading effects, Physics::Accelerator Physics, Beam emittance, Atomic physics, Beam (structure), Astronomical and Space Sciences
Abstract

Author(s): Lee, P; Audet, TL; Lehe, R; Vay, JL; Maynard, G; Cros, B | Abstract: In laser-driven wakefield, ionization induced injection is an efficient way to inject electrons in the plasma wave. A detailed study on the beam dynamics under the influence of beam loading effects, which can be controlled by the concentration of nitrogen impurity introduced in the hydrogen gas was conducted. For a specific value of this percentage, the final energy of the high-energy electron bunch becomes nearly independent of the trapped positions, thus leading to a small energy dispersion. We also show that the final beam emittance is mainly determined by the injection process.

Published
2017

13. Optimization of laser-plasma injector via beam loading effects using ionization-induced injection

Author

P. Lee, T. L. Audet, J.-L. Vay, Brigitte Cros, Gilles Maynard, Remi Lehe, Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique des gaz et des plasmas ( LPGP ), and Université Paris-Sud - Paris 11 ( UP11 ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
Accelerator Physics (physics.acc-ph), Nuclear and High Energy Physics, Materials science, Physics and Astronomy (miscellaneous), [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], FOS: Physical sciences, Electron, 7. Clean energy, 01 natural sciences, law.invention, law, Ionization, 0103 physical sciences, [ PHYS.PHYS.PHYS-GEN-PH ] Physics [physics]/Physics [physics]/General Physics [physics.gen-ph], lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, [ PHYS.PHYS.PHYS-ACC-PH ] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], 010306 general physics, Range (particle radiation), 010308 nuclear & particles physics, Charge density, Surfaces and Interfaces, Plasma, Laser, [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph], Physics - Plasma Physics, Plasma Physics (physics.plasm-ph), Cathode ray, lcsh:QC770-798, Physics::Accelerator Physics, Physics - Accelerator Physics, Atomic physics, Beam (structure)
Abstract

Simulations of ionization induced injection in a laser driven plasma wakefield show that high-quality electron injectors in the 50-200 MeV range can be achieved in a gas cell with a tailored density profile. Using the PIC code Warp with parameters close to existing experimental conditions, we show that the concentration of $\mathrm{N_2}$ in a hydrogen plasma with a tailored density profile is an efficient parameter to tune electron beam properties through the control of the interplay between beam loading effects and varying accelerating field in the density profile. For a given laser plasma configuration, with moderate normalized laser amplitude, $a_0=1.6$ and maximum electron plasma density, $n_{e0}=4\times 10^{18}\,\mathrm{cm^{-3}}$, the optimum concentration results in a robust configuration to generate electrons at 150~MeV with a rms energy spread of 4\% and a spectral charge density of 1.8~pC/MeV., Comment: 13 pages, 10 figures

Published
2017
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14. Dynamics of electron injection and acceleration driven by laser wakefield in tailored density profiles

Author

J.-L. Vay, P. Lee, Brigitte Cros, T. L. Audet, Remi Lehe, Gilles Maynard, Laboratoire de physique des gaz et des plasmas (LPGP), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Physics and Astronomy (miscellaneous), [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Electron, 01 natural sciences, Linear particle accelerator, 010305 fluids & plasmas, law.invention, Acceleration, Affordable and Clean Energy, law, 0103 physical sciences, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Thermal emittance, Laser power scaling, 010306 general physics, Physics, Surfaces and Interfaces, Plasma, Laser, Nuclear & Particles Physics, Physical Sciences, lcsh:QC770-798, Physics::Accelerator Physics, Beam emittance, Atomic physics
Abstract

© 2016, American Physical Society. All rights reserved. The dynamics of electron acceleration driven by laser wakefield is studied in detail using the particle-in-cell code WARP with the objective to generate high-quality electron bunches with narrow energy spread and small emittance, relevant for the electron injector of a multistage accelerator. Simulation results, using experimentally achievable parameters, show that electron bunches with an energy spread of ∼11% can be obtained by using an ionization-induced injection mechanism in a mm-scale length plasma. By controlling the focusing of a moderate laser power and tailoring the longitudinal plasma density profile, the electron injection beginning and end positions can be adjusted, while the electron energy can be finely tuned in the last acceleration section.

Published
2016

15. Modeling laser-driven electron acceleration using WARP with Fourier decomposition

Author

Gilles Maynard, T. L. Audet, P. Lee, Remi Lehe, Brigitte Cros, and J.-L. Vay

Subjects
Nuclear and High Energy Physics, 01 natural sciences, Atomic, 010305 fluids & plasmas, law.invention, Electron acceleration, Particle and Plasma Physics, law, Electron injection, 0103 physical sciences, Ionization-induced injection, Nuclear, 010306 general physics, Instrumentation, Fourier series, Physics, Waves in plasmas, PIC, Dynamics (mechanics), Molecular, Plasma, WARP, Laser, Nuclear & Particles Physics, Computational physics, LPA, Other Physical Sciences, Cathode ray, Astronomical and Space Sciences
Abstract

© 2015 Elsevier B.V. WARP is used with the recent implementation of the Fourier decomposition algorithm to model laser-driven electron acceleration in plasmas. Simulations were carried out to analyze the experimental results obtained on ionization-induced injection in a gas cell. The simulated results are in good agreement with the experimental ones, confirming the ability of the code to take into account the physics of electron injection and reduce calculation time. We present a detailed analysis of the laser propagation, the plasma wave generation and the electron beam dynamics.

Published
2016

16. Localization of ionization-induced trapping in a laser wakefield accelerator using a density down-ramp

Author

P. Monot, Antoine Maitrallain, S. Reymond, T. L. Audet, I. Gallardo González, Henrik Ekerfelt, Martin Hansson, Anders Persson, Claes-Göran Wahlström, Xavier Davoine, Bastian Aurand, S. Dobosz Dufrénoy, Olle Lundh, F. G. Desforges, Brigitte Cros, Department of Physics, Mathematical Physics, Lund University, Lund University [Lund], Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Sud - Paris 11 (UP11)-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 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), 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), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Condensed Matter::Quantum Gases, [PHYS]Physics [physics], Achievement of high brightness electron beam with laser plasma accelerators [13.2], 010308 nuclear & particles physics, Electron, Trapping, Condensed Matter Physics, Plasma acceleration, Accelerators and Storage Rings, 01 natural sciences, Novel Acceleration Techniques (ANAC2) [13], Linear particle accelerator, Charged particle, Ion, Nuclear Energy and Engineering, Ionization, Field desorption, 0103 physical sciences, Physics::Accelerator Physics, Physics::Atomic Physics, Atomic physics, 010306 general physics
Abstract

International audience; We report on a study on controlled trapping of electrons, by field ionization of nitrogen ions, in laser wakefield accelerators in variable length gas cells. In addition to ionization-induced trapping in the density plateau inside the cells, which results in wide, but stable, electron energy spectra, a regime of ionization-induced trapping localized in the density down-ramp at the exit of the gas cells, is found. The resulting electron energy spectra are peaked, with 10% shot-to-shot fluctuations in peak energy. Ionization-induced trapping of electrons in the density down-ramp is a way to trap and accelerate a large number of electrons, thus improving the efficiency of the laser-driven wakefield acceleration.

Published
2016
Full Text
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17. Investigation of ionization-induced electron injection in a wakefield driven by laser inside a gas cell

Author

S. Dobosz Dufrénoy, A. Maitrallain, Martin Hansson, Claes-Göran Wahlström, Brigitte Cros, Olle Lundh, T. L. Audet, Gilles Maynard, Anders Persson, I. Gallardo González, P. Lee, F. G. Desforges, Remi Lehe, P. Monot, Bastian Aurand, J.-L. Vay, Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Lund University [Lund], 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), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), 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), and Lawrence Berkeley National Laboratory [Berkeley] (LBNL)

Subjects
Charge injection, Electric fields, Hydrogen, Fluids & Plasmas, Classical Physics, chemistry.chemical_element, Electron, 01 natural sciences, Atomic, 010305 fluids & plasmas, law.invention, Particle and Plasma Physics, law, Electric field, Ionization, 0103 physical sciences, Nuclear, 010306 general physics, Physics, [PHYS]Physics [physics], Molecular, Charge (physics), Condensed Matter Physics, Laser, Pulse (physics), Plasma waves, Focal points, Cardinal point, chemistry, Particle-in-cell method, Atomic physics, Astronomical and Space Sciences
Abstract

© 2016 AIP Publishing LLC. Ionization-induced electron injection was investigated experimentally by focusing a driving laser pulse with a maximum normalized potential of 1.2 at different positions along the plasma density profile inside a gas cell, filled with a gas mixture composed of 99%H2+1%N2. Changing the laser focus position relative to the gas cell entrance controls the accelerated electron bunch properties, such as the spectrum width, maximum energy, and accelerated charge. Simulations performed using the 3D particle-in-cell code WARP with a realistic density profile give results that are in good agreement with the experimental ones. The interest of this regime for optimizing the bunch charge in a selected energy window is discussed.

Published
2016

18. Analysis of electron injection in laser wakefield acceleration using betatron emission in capillary tubes

Author

T. L. Audet, B. S. Paradkar, P. Monot, J. Ju, Anders Persson, Martin Hansson, Olle Lundh, S. Dobosz Dufrénoy, Gilles Maynard, F. G. Desforges, Claes-Göran Wahlström, Brigitte Cros, Bastian Aurand, P. Lee, Lovisa Senje, I. Gallardo-González, J.-L. Vay, Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Lund University [Lund], 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), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), 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), Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Department of Physics, Kenneth W. D. Ledingham, Klaus Spohr, Paul McKenna, Paul R. Bolton, Eric Esarey, Carl B. Schroeder, and Florian J. Grüner

Subjects
Physics, Simulations, [PHYS]Physics [physics], Ionization, Waves in plasmas, Lasers, Electrons, Plasma, Electron, Laser, Betatron, Fluence, law.invention, Capillaries, Acceleration, Particles, law, Plasmas, X-rays, Atomic physics
Abstract

International audience; The dynamics of ionization-induced electron injection in the high density (~ 1:2 × 1019cm-3) regime of Laser Wakefield Acceleration (LWFA) was investigated by analyzing betatron X-ray emission inside dielectric capillary tubes. A comparative study of the electron and betatron X-ray properties was performed for both self-injection and ionization-induced injection. Direct experimental evidence of early onset of ionization-induced injection into the plasma wave was obtained by mapping the X-ray emission zone inside the plasma. Particle-In-Cell (PIC) simulations showed that the early onset of ionization-induced injection, due to its lower trapping threshold, suppresses self-injection of electrons. An increase of X-ray fluence by at least a factor of two was observed in the case of ionization-induced injection due to an increased trapped charge compared to self-injection mechanism. © (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

Published
2015

19. Enhanced stability of laser wakefield acceleration using dielectric capillary tubes

Author

P. Monot, J. Ju, S. Dobosz Dufrénoy, Lovisa Senje, F. G. Desforges, Martin Hansson, T. L. Audet, Olle Lundh, Anders Persson, Brigitte Cros, Claes-Göran Wahlström, Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), 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), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), 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), Department of Chemistry, Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Department of Physics, Mathematical Physics, Lund University, Lund University, Università degli Studi di Firenze = University of Florence (UniFI), and Lund University [Lund]

Subjects
Physics, Nuclear and High Energy Physics, Jet (fluid), [PHYS.PHYS]Physics [physics]/Physics [physics], Physics and Astronomy (miscellaneous), Capillary action, business.industry, Charge (physics), Surfaces and Interfaces, Dielectric, Electron, Laser, Accelerators and Storage Rings, Stability (probability), Novel Acceleration Techniques (ANAC2) [13], law.invention, Acceleration, Optics, law, lcsh:QC770-798, Physics::Accelerator Physics, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Atomic physics, Coordination and Communication [13.1], business
Abstract

International audience; The stability of beams of laser wakefield accelerated electrons in dielectric capillary tubes is experimentally investigated. These beams are found to be more stable in charge and pointing than the corresponding beams of electrons accelerated in a gas jet. Electron beams with an average charge of 43 pC and a standard deviation of 14% are generated. The fluctuations in charge are partly correlated to fluctuations in laser pulse energy. The pointing scatter of the electron beams is measured to be as low as 0.8 mrad (rms). High laser beam pointing stability improved the stability of the electron beams.

Published
2014

20. Reproducibility of electron beams from laser wakefield acceleration in capillary tubes

Author

J. Ju, Lovisa Senje, Martin Hansson, Claes-Göran Wahlström, T. L. Audet, Anders Persson, Brigitte Cros, F. G. Desforges, Olle Lundh, S. Dobosz-Dufrenoy, Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Department of Chemistry, Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Chinese Academy of Sciences [Beijing] (CAS), Lund University [Lund], 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), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), 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), Department of Physics, and Università degli Studi di Firenze = University of Florence (UniFI)

Subjects
Physics, Nuclear and High Energy Physics, Jet (fluid), Electron density, [PHYS.PHYS]Physics [physics]/Physics [physics], Plasma parameters, Plasma, Electron, Laser, law.invention, Full width at half maximum, law, Physics::Accelerator Physics, Atomic physics, Instrumentation, Beam divergence
Abstract

The stability of accelerated electron beams produced by self injection of plasma electrons into the wakefield driven by a laser pulse guided inside capillary tubes is analyzed statistically in relation to laser and plasma parameters, and compared to results obtained in a gas jet. The analysis shows that reproducible electron beams are achieved with a charge of 66 pC +/- 11%, a FWHM beam divergence of 9 mrad +/- 14%, a maximum energy of 120 MeV +/- 10% and pointing fluctuations of 2.3 mrad using 10 mm long, 178 mu m diameter capillary tubes at an electron density of (10.0 +/- 1.5) x 10(18) cm(-3). Active stabilization of the laser pointing was used and laser parameters were recorded on each shot. Although the shot-to-shot laser energy fluctuations can account for a fraction of the electrons fluctuations, gas density fluctuations are suspected to be a more important source of instability. (C) 2013 Elsevier B.V. All rights reserved.

Published
2014

21. Dynamics of ionization-induced electron injection in the high density regime of laser wakefield acceleration

Author

B. S. Paradkar, P. Monot, Gilles Maynard, J. Ju, Claes-Göran Wahlström, T. L. Audet, Magnus Hansson, Anders Persson, S. Dobosz-Dufrenoy, Lovisa Senje, Olle Lundh, Brigitte Cros, F. G. Desforges, J.-L. Vay, Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Department of Chemistry, Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Chinese Academy of Sciences [Beijing] (CAS), Lund University [Lund], 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), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), 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), and Università degli Studi di Firenze = University of Florence (UniFI)

Subjects
Physics, [PHYS.PHYS]Physics [physics]/Physics [physics], Waves in plasmas, Plasma, Electron, Condensed Matter Physics, Betatron, Laser, Fluence, law.invention, law, Ionization, Plasma diagnostics, Physics::Atomic Physics, Atomic physics
Abstract

International audience; The dynamics of ionization-induced electron injection in high density (~1.2 × 1019 cm-3) regime of laser wakefield acceleration is investigated by analyzing the betatron X-ray emission. In such high density operation, the laser normalized vector potential exceeds the injection-thresholds of both ionization-injection and self-injection due to self-focusing. In this regime, direct experimental evidence of early on-set of ionization-induced injection into the plasma wave is given by mapping the X-ray emission zone inside the plasma. Particle-In-Cell simulations show that this early on-set of ionization-induced injection, due to its lower trapping threshold, suppresses the trapping of self-injected electrons. A comparative study of the electron and X-ray properties is performed for both self-injection and ionization-induced injection. An increase of X-ray fluence by at least a factor of two is observed in the case of ionization-induced injection due to increased trapped charge compared to self-injection mechanism.

Published
2014

22. Laser plasma acceleration of electrons with multi-PW laser beams in the frame of CILEX

Author

O. Delferrière, Mickael Grech, Arnaud Beck, F. G. Desforges, J. Ju, François Amiranoff, Jean-Raphael Marques, A. Di Piazza, P. Monot, S. Dobosz-Dufrenoy, B. S. Paradkar, C. Bruni, Xavier Davoine, Gilles Maynard, Caterina Riconda, J. Schwindling, Laurent Gremillet, Nicolas Delerue, A. Specka, Brigitte Cros, Patrick Mora, P. Audebert, Fabrice Mathieu, D. Normand, T. Vinatier, Cecile Rimbault, A. Chancé, M. Lobet, Ph. Martin, T. L. Audet, Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Dept. Accelerateurs, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-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), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Ralph Assmann, Massimo Ferrario, Jens Osterhoff, Arnd E. Specka, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
Nuclear and High Energy Physics, Research group A. Di Piazza – Division C. H. Keitel, Electron, 7. Clean energy, 01 natural sciences, 010305 fluids & plasmas, law.invention, Relativistic particle, Acceleration, Positron, Optics, Multi-stage LPA, law, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Instrumentation, Physics, Range (particle radiation), Laser wakefield, business.industry, Plasma, Plasma acceleration, Laser, Electron acceleration, LPA, PW laser, Laser plasma acceleration, Physics::Accelerator Physics, business
Abstract

International audience; Laser plasma acceleration of electrons has progressed along with advances in laser technology. It is thus expected that the development in the near-future of multi-PW-class laser and facilities will enable a vast range of scientific opportunities for laser plasma acceleration research. On one hand, high peak powers can be used to explore the extremely high intensity regime of laser wakefield acceleration, producing for example large amounts of electrons in the GeV range or generating high energy photons. On the other hand, the available laser energy can be used in the quasi-linear regime to create accelerating fields in large volumes of plasma and study controlled acceleration in a plasma stage of externally injected relativistic particles, either electrons or positrons. In the frame of the Centre Interdisciplinaire de la Lumière EXtrême (CILEX), the Apollon-10P laser will deliver two beams at the 1 PW and 10 PW levels, in ultra-short (View the MathML source) pulses, to a target area dedicated to electron acceleration studies, such as the exploration of the non-linear regimes predicted theoretically, or multi-stage laser plasma acceleration.

Published
2013

23. Localization of ionization-induced trapping in a laser wakefield accelerator using a density down-ramp.

Author

M Hansson, T L Audet, H Ekerfelt, B Aurand, I Gallardo González, F G Desforges, X Davoine, A Maitrallain, S Reymond, P Monot, A Persson, S Dobosz Dufrénoy, C-G Wahlström, B Cros, and O Lundh

Subjects
*LASER plasma accelerators, *ELECTRON impact ionization, *ELECTRON energy states, *PLASMA density, *ELECTRON traps
Abstract

We report on a study on controlled trapping of electrons, by field ionization of nitrogen ions, in laser wakefield accelerators in variable length gas cells. In addition to ionization-induced trapping in the density plateau inside the cells, which results in wide, but stable, electron energy spectra, a regime of ionization-induced trapping localized in the density down-ramp at the exit of the gas cells, is found. The resulting electron energy spectra are peaked, with 10% shot-to-shot fluctuations in peak energy. Ionization-induced trapping of electrons in the density down-ramp is a way to trap and accelerate a large number of electrons, thus improving the efficiency of the laser-driven wakefield acceleration. [ABSTRACT FROM AUTHOR]

Published
2016
Full Text
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