14 results on '"E. D. Filippov"'
Search Results
2. Shock Hugoniot data for water up to 5 Mbar obtained with quartz standard at high-energy laser facilities
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D. Mancelli, I. Errea, A. Tentori, O. Turianska, H. Larreur, K. Katagiri, N. Ozaki, N. Kamimura, D. Kamibayashi, K. Ishida, H. Ogura, K. Kawasaki, Y. Maeda, Y. Hironaka, K. Shigemori, K. Batani, G. Schaumann, O. Rosmej, P. Neumayer, B. Zielbauer, A. S. Martynenko, E. D. Filippov, S. Pikuz, D. Batani, European Commission, European Research Council, and Ministry of Science and Higher Education of the Russian Federation
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Article Subject ,Electrical and Electronic Engineering ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics - Abstract
In this work, we present experimental results on the behavior of liquid water at megabar pressure. The experiment was performed using the HIPER (High-Intensity Plasma Experimental Research) laser facility, a uniaxial irradiation chamber of GEKKO XII (GXII) at the Institute of Laser Engineering (ILE), and the PHELIX at GSI (GSI Helmholtz Centre for Heavy Ion Research), a single-beam high-power laser facility, to launch a planar shock into solid multilayered water samples. Equation-of-state data of water (H2O) are obtained in the pressure range 0.50–4.6 Mbar by tuning the laser-drive parameters. The Hugoniot parameters (pressure, density, etc.) and the shock temperature were simultaneously determined by using VISAR and SOP as diagnostic tools and quartz as the standard material for impedance mismatch experiments. Finally, our experimental results are compared with hydrodynamic simulations tested with different equations of state, showing good compatibility with tabulated SESAME tables for water., The authors would like to acknowledge the support of the laser technical team at GEKKO XII (ILE) and PHELIX (GSI). This work received funding from the Euratom Research and Training Program 2014–2018 and 2019-2020 (Grant agreement no. 633053). The involved teams were operated within the framework of the Enabling Research Project ENR-IFE19.CEA-01, Study of Direct Drive and Shock Ignition for IFE: Theory, Simulations, Experiments, Diagnostics Development. JIHT RAS team members were supported by the Ministry of Science and Higher Education of the Russian Federation (State Assignment no. 075-00460-21-00).
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- 2021
3. X-ray diagnostics in HEDP with high power lasers
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S. A. Pikuz, M. A. Alkhimova, E. D. Filippov, S. S. Makarov, A. S. Martynenko, M. D. Mishchenko, T. A. Pikuz, S. N. Ryazantsev, I. Yu. Skobelev, and A. Ya. Faenov
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- 2019
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4. X-ray daignostics of hydrodynamic phenomena in laser- induced astrophysically-relevant plasma
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E. D. Filippov, I. Yu. Skobelev, S. N. Ryazantsev, G. Revet, S. N. Chen, J. Fuchs, and S. A. Pikuz
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- 2019
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5. Laser-Produced Magnetic-Rayleigh-Taylor Unstable Plasma Slabs in a 20 T Magnetic Field
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J. Béard, S. S. Makarov, Andrea Ciardi, Shihua Chen, Mirela Cerchez, E. D. Filippov, T. Gangolf, B. Khiar, G. Revet, S. A. Pikuz, Oswald Willi, M. Ouillé, A. A. Soloviev, Julien Fuchs, M. Safronova, K. F. Burdonov, M. V. Starodubtsev, I. Yu. Skobelev, Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-CY Cergy Paris Université (CY), 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 National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Institute of Applied Physics (IAP, Nizhny Novgorod), Institut für Laser und Plasmaphysik, Heinrich Heine Universität Düsseldorf = Heinrich Heine University [Düsseldorf], Joint Institute for High Temperatures of the RAS (JIHT), Russian Academy of Sciences [Moscow] (RAS), 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 d'Etude du Rayonnement et de la Matière en Astrophysique et Atmosphères = Laboratory for Studies of Radiation and Matter in Astrophysics and Atmospheres (LERMA), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-CY Cergy Paris Université (CY), Lobachevsky State University [Nizhni Novgorod], Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Horia Hulubei National Institute of Physics and Nuclear Engineering (NIPNE), IFIN-HH, ANR-11-IDEX-0004,SUPER,Sorbonne Universités à Paris pour l'Enseignement et la Recherche(2011), ANR-10-EQPX-0029,EQUIP@MESO,Equipement d'excellence de calcul intensif de Mesocentres coordonnés - Tremplin vers le calcul petaflopique et l'exascale(2010), ANR-11-LABX-0062,PLAS@PAR,PLASMAS à PARIS, au delà des frontières(2011), European Project: 787539,GENESIS - 10.3030/787539, and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
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General Physics and Astronomy ,FOS: Physical sciences ,01 natural sciences ,Instability ,Collimated light ,law.invention ,Physics::Fluid Dynamics ,symbols.namesake ,law ,Physics::Plasma Physics ,[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] ,0103 physical sciences ,Rayleigh scattering ,010306 general physics ,Inertial confinement fusion ,ComputingMilieux_MISCELLANEOUS ,Physics ,Condensed matter physics ,Plasma ,Laser ,Physics - Plasma Physics ,Magnetic field ,Plasma Physics (physics.plasm-ph) ,Physics::Space Physics ,Slab ,symbols - Abstract
Magnetized laser-produced plasmas are central to many novel laboratory astrophysics and inertial confinement fusion studies, as well as in industrial applications. Here we provide the first complete description of the three-dimensional dynamics of a laser-driven plasma plume expanding in a 20 T transverse magnetic field. The plasma is collimated by the magnetic field into a slender, rapidly elongating slab, whose plasma-vacuum interface is unstable to the growth of the "classical", fluid-like magnetized Rayleigh-Taylor instability., Comment: Accepted for publication in Physical Review Letters
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- 2019
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6. Precise wavelength measurements of potassium He- and Li-like satellites emitted from the laser plasma of a mineral target
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S. N. Ryazantsev, M. D. Mishchenko, A. S. Martynenko, Oldrich Renner, I. Yu. Skobelev, M. Krůs, S. A. Pikuz, and E. D. Filippov
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Nuclear and High Energy Physics ,Range (particle radiation) ,Materials science ,Resonance ,Plasma ,Laser ,Atomic and Molecular Physics, and Optics ,Spectral line ,Ion ,law.invention ,Wavelength ,Nuclear Energy and Engineering ,law ,Atomic theory ,lcsh:QC770-798 ,lcsh:Nuclear and particle physics. Atomic energy. Radioactivity ,Electrical and Electronic Engineering ,Atomic physics - Abstract
Atomic models of high-Z multicharged ions are extremely complex and require experimental validation. One way to do so is to crosscheck the predicted wavelengths of resonance transitions in He- and Li-like ions against precise spectroscopic measurements that use the spectral lines of H-like ions for spectra calibration; these reference data can be modeled with outstanding precision. However, for elements with Z of at least 15, it is quite difficult to create a hot dense plasma with a large concentration of H-like charge states. To mitigate this issue, the suggestion here is to use as laser targets particular minerals comprising elements with moderate (between 15 and 30) and low (less than 15) Z, with emission from the latter delivering perfect reference lines over a whole range of He- and Li-like moderate-Z emission under examination. This approach is implemented to measure the wavelengths of resonance transitions (1snp → 1s2 for n = 2, 3) in He-like K ions and their dielectronic satellites by irradiating plates of orthoclase (KAlSi3O8) with 0.5-kJ subnanosecond laser pulses. X-ray spectra of the laser-generated plasma contain the investigated lines of highly charged K ions together with precisely known reference lines of H-like Al and Si atoms. The K-shell spectral line wavelengths are measured with a precision of around 0.3 mÅ.
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- 2021
7. Promising lines of research in the realms of laboratory nuclear astrophysics by means of powerful lasers
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A. Ya. Faenov, I. M. Mordvintsev, V. P. Krainov, B. V. Zagreev, I. Yu. Skobelev, S. A. Pikuz, S. A. Shulyapov, V. S. Belyaev, A. V. Lobanov, V. V. Bolshakov, I. N. Tsymbalov, A. P. Matafonov, Andrei B Savel'ev, A. Yu. Kedrov, and E. D. Filippov
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Physics ,Nuclear reaction ,Nuclear and High Energy Physics ,Isotope ,010308 nuclear & particles physics ,Nuclear Theory ,chemistry.chemical_element ,Astrophysics ,Laser ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,law.invention ,Nuclear physics ,chemistry ,law ,0103 physical sciences ,Nuclear astrophysics ,Neutron source ,Lithium ,Nuclear Experiment ,010306 general physics ,s-process - Abstract
Basic nuclear-astrophysics problems that can be studied under laboratory conditions at a laserradiation intensity of 1018 W/cm2 or more are specified. These are the lithium problem, the problem of determining neutron sources for s-processes of heavy-element formation, the formation of bypassed stable p-nuclei, and nuclear reactions involving isotopes used by astronomers for diagnostics purposes. The results of experiments at the Neodym laser facility are presented, and proposals for further studies in these realms are formulated.
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- 2016
8. Analyzing x-ray emission of target impurities to determine the parameters of recombining laser plasma
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S. A. Pikuz, G. Revet, E. D. Filippov, Julien Fuchs, I. Yu Skobelev, and Shihua Chen
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History ,Materials science ,law ,Impurity ,X-ray ,Plasma ,Atomic physics ,Laser ,Computer Science Applications ,Education ,law.invention - Abstract
In this work, the possibility of the implementation of impurities in the compositions of solid thick targets irradiated by intense lasers is discussed in order to solve problems of optically-thick plasma diagnostics. Calculations were conducted for relative intensities of oxygen resonance lines (H-like—3p–1s, 4p–1s, 5p–1s, 6p–1s, 7p–1s transitions) in a recombination quasi-stationary model to obtain plasma parameters. In the experiment with 0.6 ns, 40 J laser pulses focused to 600 μm focal spot at solid polyvinylidene chloride target the parameters of plasma jet stopped by solid oxidized Teflon obstacle were studied by means of spatially-resolved x-ray spectroscopy.
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- 2020
9. X-ray spectroscopy diagnostics to study complex supersonic plasma flows with astrophysical relevance in laser plasma
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S. A. Pikuz, E. D. Filippov, S. N. Ryazantsev, I. Yu. Skobelev, G. Revet, D. P. Higginson, S. N. Chen, B. Albertazzi, A. A. Soloviev, J. Beard, B. Khiar, A. Ciardi, A. Ya. Faenov, H. Pepin, and J. Fuchs
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- 2017
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10. X-ray spectroscopy diagnostics on supersonic astrophysically- relevant plasma jets
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S. A. Pikuz, E. D. Filippov, S. N. Ryazantsev, I. Yu. Skobelev, G. Revet, D. P. Higginson, S. N. Chen, B. Albertazzi, A. A. Soloviev, J. Beard, B. Khiar, A. Ciardi, A. Ya. Faenov, H. Pepin, and J. Fuchs
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- 2016
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11. Parameters of supersonic astrophysically-relevant plasma jets collimating via poloidal magnetic field measured by x-ray spectroscopy method
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S. N. Ryazantsev, Drew Higginson, Julien Fuchs, E. D. Filippov, Shihua Chen, D. Khaghani, G. Revet, I. Yu. Skobelev, and S. A. Pikuz
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Physics ,History ,X-ray spectroscopy ,business.industry ,Plasma ,01 natural sciences ,Collimated light ,010305 fluids & plasmas ,Computer Science Applications ,Education ,Magnetic field ,Optics ,0103 physical sciences ,Supersonic speed ,Atomic physics ,010306 general physics ,business - Published
- 2016
12. [Ways to improve the care of patients with suppurative surgical diseases]
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M V, Kazarezov, G A, Morgunov, A M, Korolëva, I I, Korolev, V O, Bergen, and E D, Filippov
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Male ,Siberia ,Sepsis ,Acute Disease ,Wound Infection ,Humans ,Cellulitis ,Female ,Abscess ,Quality of Health Care - Published
- 1995
13. Characterization and performance of the Apollon Short-Focal-Area facility following its commissioning at 1 PW level
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A. Chaleil, Jean-Luc Paillard, Y. Ayoul, A. Beluze, W. P. Yao, F. Negoita, A. Leblanc, Julien Fuchs, Xavier Davoine, V. Lelasseux, G. Qi, A. Fazzini, Fabrizio Consoli, N. Lebas, F. Perez, A. Freneaux, S. A. Pikuz, J. P. Delaneau, L. Lecherbourg, Emmanuel d'Humières, V. Horny, P.-A. Söderström, E. D. Filippov, Sophia Chen, D. Cavanna, Patrick Audebert, J. L. Dubois, M. Chabanis, F. Mathieu, Patrizio Antici, Zhi-wei Chen, Fabien Quéré, T. Ceccotti, L. Lancia, J. Albrecht, P. Forestier-Colleoni, W. Ma, M. Cuciuc, Laurent Gremillet, M. Scisciò, S. Vallières, Camille Evrard, Lucas Ranc, Shuhui Sun, Dimitris N. Papadopoulos, K. Burdonov, Luc Martin, P. Wang, Laboratoire pour l'utilisation des lasers intenses (LULI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Énergie Matériaux Télécommunications - INRS (EMT-INRS), Institut National de la Recherche Scientifique [Québec] (INRS)-Université du Québec à Montréal = University of Québec in Montréal (UQAM), Physique à Haute Intensité (PHI), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), CEA- Saclay (CEA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Horia Hulubei National Institute of Physics and Nuclear Engineering (NIPNE), IFIN-HH, Agenzia Nazionale per le nuove Tecnologie, l’energia e lo sviluppo economico sostenibile (ENEA), Centre d'Etudes Lasers Intenses et Applications (CELIA), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB), Joint Institute for High Temperatures of the RAS (JIHT), Russian Academy of Sciences [Moscow] (RAS), Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), State Key Laboratory of Nuclear Physics and Technology (SKL-NPT), Peking University [Beijing], Burdonov, Konstantin, Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire Matière sous Conditions Extrêmes (LMCE), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Italian National agency for new technologies, Energy and sustainable economic development [Frascati] (ENEA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), A.M.Obukhov Institute of Atmospheric Physics (IAP), Laboratoire Charles Fabry / Lasers, Laboratoire Charles Fabry (LCF), Institut d'Optique Graduate School (IOGS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Thales LAS France, Institut National de la Recherche Scientifique [Québec] (INRS), ANR-17-CE30-0026,PiNNaCLE,Développement d'une ligne de neutrons pulsés compacte et de haute brillance(2017), European Project: 787539,GENESIS - 10.3030/787539, European Project: 633053,H2020,EURATOM-Adhoc-2014-20,EUROfusion(2014), Burdonov, K., Fazzini, A., Lelasseux, V., Albrecht, J., Antici, P., Ayoul, Y., Beluze, A., Cavanna, D., Ceccotti, T., Chabanis, M., Chaleil, A., Chen, S. N., Chen, Z., Consoli, F., Cuciuc, M., Davoine, X., Delaneau, J. P., D'Humieres, E., Dubois, J. -L., Evrard, C., Filippov, E., Freneaux, A., Forestier-Colleoni, P., Gremillet, L., Horny, V., Lancia, L., Lecherbourg, L., Lebas, N., Leblanc, A., Ma, W., Martin, L., Negoita, F., Paillard, J. -L., Papadopoulos, D., Perez, F., Pikuz, S., Qi, G., Quere, F., Ranc, L., Soderstrom, P. -A., Scisciò, M., Sun, S., Vallieres, S., Wang, P., Yao, W., Mathieu, F., Audebert, P., and Fuchs, J.
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Nuclear and High Energy Physics ,Materials science ,Phase (waves) ,FOS: Physical sciences ,QC770-798 ,01 natural sciences ,Electromagnetic radiation ,010305 fluids & plasmas ,law.invention ,[PHYS] Physics [physics] ,Optics ,law ,Nuclear and particle physics. Atomic energy. Radioactivity ,0103 physical sciences ,Irradiation ,Electrical and Electronic Engineering ,010306 general physics ,ComputingMilieux_MISCELLANEOUS ,[PHYS]Physics [physics] ,business.industry ,Laser ,Atomic and Molecular Physics, and Optics ,Physics - Plasma Physics ,Characterization (materials science) ,Intensity (physics) ,Plasma Physics (physics.plasm-ph) ,Nuclear Energy and Engineering ,business ,Beam (structure) ,Nominal power (photovoltaic) - Abstract
We present the results of the first commissioning phase of the ``short focal length'' area (SFA) of the Apollon laser facility (located in Saclay, France), which was performed with the first available laser beam (F2), scaled to a nominal power of one petawatt. Under the conditions that were tested, this beam delivered on target pulses of 10 J average energy and 24 fs duration. Several diagnostics were fielded to assess the performance of the facility. The on-target focal spot, its spatial stability, the temporal intensity profile prior to the main pulse, as well as the resulting density gradient formed at the irradiated side of solid targets, have been thoroughly characterized, with the goal of helping users design future experiments. Emissions of energetic electrons, ions, and electromagnetic radiation were recorded, showing good laser-to-target coupling efficiency and an overall performance comparable with that of similar international facilities. This will be followed in 2022 by a further commissioning stage at the multi-petawatt level.
14. Particle energization in colliding subcritical collisionless shocks investigated in the laboratory
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Fazzini, A., Yao, W., Burdonov, K., Béard, J., Chen, S. N., Ciardi, A., d'Humières, E., Diab, R., Filippov, E. D., Kisyov, S., Lelasseux, V., Miceli, M., Moreno, Q., Orlando, S., Pikuz, S., Ribeyre, X., Starodubtsev, M., Zemskov, R., Fuchs, J., A. Fazzini, W. Yao, K. Burdonov, J. B??ard, S. N. Chen, A. Ciardi, E. d???Humi??re, R. Diab, E. D. Filippov, S. Kisyov, V. Lelasseux, M. Miceli, Q. Moreno, S. Orlando, S. Pikuz, X. Ribeyre, M. Starodubtsev, R. Zemskov, J. Fuchs, 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 d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Centre d'Etudes Lasers Intenses et Applications (CELIA), and Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)
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Plasma Physics (physics.plasm-ph) ,Settore FIS/05 - Astronomia E Astrofisica ,[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] ,[SDU]Sciences of the Universe [physics] ,Space and Planetary Science ,Astrophysics::High Energy Astrophysical Phenomena ,FOS: Physical sciences ,Astronomy and Astrophysics ,shock waves ,interplanetary medium ,Physics - Plasma Physics ,acceleration of particles - Abstract
Context. Colliding collisionless shocks appear across a broad variety of astrophysical phenomena and are thought to be possible sources of particle acceleration in the Universe. Aims. The main goal of our experimental and computational work is to understand the effect of the interpenetration between two subcritical collisionless shocks on particle energization. Methods. To investigate the detailed dynamics of this phenomenon, we performed a dedicated laboratory experiment. We generated two counter-streaming subcritical collisionless magnetized shocks by irradiating two Teflon (C2F4) targets with 100 J, 1 ns laser beams on the LULI2000 laser facility. The interaction region between the plasma flows was pre-filled with a low-density background hydrogen plasma and initialized with an externally applied homogeneous magnetic field perpendicular to the shocks. We also modeled the macroscopic evolution of the system via hydrodynamic simulations and the microphysics at play during the interaction via particle-in-cell (PIC) simulations. Results. Here, we report our measurements of the plasma density and temperature during the formation of the supercritical shocks, their transition to subcritical, and their final interpenetration. We find that in the presence of two shocks, the ambient ions reach energies around 1.5 times of those obtained with single shocks. Both the presence of the downstream zone of the second shock and of the downstream zone common for the two shocks play a role in the different energization: the characteristics of the perpendicular electric fields in the two areas indeed allow for certain particles to continue being accelerated or, at least, to avoid being decelerated. Conclusions. The findings of our laboratory investigation are relevant for our understanding of the energy distribution of high-energy particles that populate the interplanetary space in our solar system and the very local interstellar medium around the heliopause, where observations have indicated evidence of subcritical collisionless shocks that may eventually go on to collide with one another.
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- 2022
- Full Text
- View/download PDF
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