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1. Experimental Study of the Interaction of a Laser Plasma Flow With a Transverse Magnetic Field

Author

R. Zemskov, A. A. Shaikin, A. A. Kochetkov, A. A. Soloviev, A. G. Luchinin, M. Yu. Glyavin, M. V. Starodubtsev, Ivan V. Yakovlev, S. E. Perevalov, K. F. Burdonov, A. V. Kotov, A. A. Kuzmin, Vladislav Ginzburg, Mikhail V. Morozkin, Efim A. Khazanov, Julien Fuchs, M. D. Proyavin, and I. A. Shaikin

Subjects
Physics, Quantum optics, Nuclear and High Energy Physics, Physics and Astronomy (miscellaneous), Plasma sheet, Astronomy and Astrophysics, Statistical and Nonlinear Physics, Plasma, Radius, Laser, Molecular physics, Electronic, Optical and Magnetic Materials, Magnetic field, law.invention, Plasma flow, Physics::Plasma Physics, law, Transverse magnetic field, Physics::Space Physics, Electrical and Electronic Engineering, human activities
Abstract

We present the results of studying experimentally the expansion of laser plasma in a strong external magnetic field (with a magnetic flux density of 13.5 T) at various sizes of the region of plasma formation on the surface of a solid-state target. It is shown that when the size of the plasma formation region is smaller than the classical plasma braking radius, a nearly identical topology of plasma flows is observed, which is characterized by the formation of a thin plasma sheet directed along the external magnetic field. If the width of the plasma formation region is comparable with the classical plasma braking radius, an additional plasma sheet starts to be formed.

Published
2020
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2. Pulsed magnetic field generation system for laser-plasma research

Author

A. G. Luchinin, V. A. Malyshev, E. A. Kopelovich, K. F. Burdonov, M. E. Gushchin, M. V. Morozkin, M. D. Proyavin, R. M. Rozental, A. A. Soloviev, M. V. Starodubtsev, A. P. Fokin, J. Fuchs, M. Yu. Glyavin, Institute of Applied Physics, 46 Ulyanov Street, 603950 Nizhny Novgorod, Russia (IAP-RAS), Laboratoire pour l'utilisation des lasers intenses (LULI), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)

Subjects
pulsed magnetic field, co-directional and oppositely connected coils, Physics::Medical Physics, FOS: Physical sciences, intense fields, Applied Physics (physics.app-ph), [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Physics - Applied Physics, Instrumentation, plasma, laser
Abstract

International audience; An up to 15 T pulsed magnetic field generator in a volume of a few cubic centimeters has been developed for experiments with magnetized laser plasma. The magnetic field is created by a pair of coils placed in a sealed reservoir with liquid nitrogen, installed in a vacuum chamber with a laser target. The bearing body provides the mechanical strength of the system both in the case of co-directional and oppositely connected coils. The configuration of the housing allows laser radiation to be introduced into the working area between the coils in a wide range of directions and focusing angles, place targets away from the symmetry axis of the magnetic system, and irradiate several targets simultaneously.

Published
2022
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3. Laboratory modelling of equatorial ‘tongue’ accretion channels in young stellar objects caused by the Rayleigh-Taylor instability

Author

Alexander Soloviev, Andrea Ciardi, R. Bonito, A. Korzhimanov, K. F. Burdonov, M. Romanova, M. V. Starodubtsev, W. P. Yao, A. Sladkov, Julien Fuchs, S. N. Chen, R. Zemskov, Salvatore Orlando, 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 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), IAP, Russian Academy of Sciences, 603155, Nizhny Novgorod, Russia, INAF - Osservatorio Astronomico di Palermo (OAPa), Istituto Nazionale di Astrofisica (INAF), Horia Hulubei National Institute of Physics and Nuclear Engineering (NIPNE), IFIN-HH, Cornell University [New York], European Project: ERC787539,GENESIS, Institute of Applied Physics (IAP, Nizhny Novgorod), and Alma Mater Studiorum University of Bologna (UNIBO)

Subjects
Physics, Young stellar object, accretion disks, Astronomy and Astrophysics, Astrophysics, stars: pre-main sequence, magnetohydrodynamics (MHD), Accretion (astrophysics), accretion, Space and Planetary Science, instabilities, Physics::Space Physics, Astrophysics::Solar and Stellar Astrophysics, Rayleigh–Taylor instability, Astrophysics::Earth and Planetary Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics::Galaxy Astrophysics
Abstract

This work was granted access to the HPC resources of MesoPSL financed by the Region Ile de France and the project EquipMeso (reference ANR-10-EQPX29-01) of the programme Investissements d’Avenir supervised by the Agence Nationale pour la Recherche.; International audience; Context. The equatorial accretion scenario, caused by the development of the Rayleigh-Taylor (RT) instability at the disk edge, was suggested by accurate three-dimensional magnetohydrodynamic (MHD) modelling, but no observational or experimental confirmation of such phenomena has been evidenced yet.Aims. We studied the propagation of a laterally extended laser-generated plasma stream across a magnetic field and investigated if this kind of structure can be scaled to the case of equatorial ‘tongue’ accretion channels in young stellar objects (YSOs); if so, this would support the possibility of equatorial accretion in young accreting stars.Methods. We conducted a scaled laboratory experiment at the PEARL laser facility. The experiment consists in an optical laser pulse that is focused onto the surface of a Teflon target. The irradiation of the target leads to the expansion of a hot plasma stream into the vacuum, perpendicularly to an externally applied magnetic field. We used a Mach-Zehnder interferometer to diagnose the plasma stream propagation along two axes, to obtain the three-dimensional distribution of the plasma stream.Results. The laboratory experiment shows the propagation of a laterally extended laser-generated plasma stream across a magnetic field. We demonstrate that: (i) such a stream is subject to the development of the RT instability, and (ii) the stream, decomposed into tongues, is able to efficiently propagate perpendicular to the magnetic field. Based on numerical simulations, we show that the origin of the development of the instability in the laboratory is similar to that observed in MHD models of equatorial tongue accretion in YSOs.Conclusions. As we verify that the laboratory plasma scales favourably to accretion inflows of YSOs, our laboratory results support the argument in favour of the possibility of the RT-instability-caused equatorial tongue accretion scenario in the astrophysical case.

Published
2022
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4. Characterization of Neutron Beams Generated in High-Intensity Interactions for Nuclear Physics Experiments

Author

Julien Fuchs, Par-Anders Soderstrom, Florin Rotaru, Sandra Dorard, Mirela Cerchez, Oswald Willi, Vincent Lelasseux, Soichiro Aogaki, Sophia Chen, S. A. Pikuz, Alice Fazzini, Florin Negoita, K. F. Burdonov, and Marius Gugiu

Subjects
Physics, Proton, Physics::Instrumentation and Detectors, business.industry, Detector, Modular design, Scintillator, Laser, law.invention, Nuclear physics, law, Calibration, Physics::Accelerator Physics, Neutron source, Neutron, Nuclear Experiment, business
Abstract

The advent of multi-PW laser facilities world-wide opens new opportunities for nuclear physics. With this perspective, we developed a high efficiency neutron counter taking into account the specifics of a high intensity laser environment. Using GEANT4 simulations and prototype testings, we report on the design of a modular neutron-counter based on boron-10 enriched scintillators and high-density polyethylene moderator. This detector has been calibrated using a plutonium-beryllium neutron source and commissioned during an actual neutrons producing laser experiment at theLULI2000 facility (France). An overall efficiency of 4.37(59)% has been demonstrated during calibration with a recovery time of a few hundreds microseconds after laser-plasma interaction. We also tested using units of this detector in neutron time-of-flight configuration during the commissioning of the 1PW arm of the Apollon laser facility. Neutrons produced by the conversion of proton accelerated by the 1PW arm of the Apollon facility have been detected, of which we will present preliminary results.

Published
2021
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5. Apollon Facility Short Focal Length Area Commissioning

Author

L. Lancia, K. F. Burdonov, T. Ceccotti, V. Lelasseaux, Fabien Quéré, F. Perez, Julien Fuchs, A. Leblanc, P. Forestier-Colleoni, A. Fazzini, and S. A. Pikuz

Subjects
Physics, Optics, law, business.industry, Focal length, Laser, business, Nominal power (radio broadcasting), Beam (structure), Laser beams, law.invention, Pulse (physics)
Abstract

We present here the results of the commissioning of the "short focal length" area, which was performed with the first available laser beam of the Apollon laser facility (Saclay, France), i.e. using the presently available F2 beam at a nominal power of one petawatt. This beam delivered laser pulses of 10 J average on-target energy with pulse durations of 25 fs.

Published
2021
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6. Status of a point-like neutron generator development

Author

R. A. Shaposhnikov, S. S. Vybin, K. F. Burdonov, M. Yu. Kazakov, A. F. Bokhanov, Sergey V. Razin, S.P. Shlepnev, M. V. Starodubtsev, Ivan Izotov, Vadim Skalyga, S. V. Golubev, and Alexander Soloviev

Subjects
Physics, Ion beam, business.industry, Neutron imaging, FOS: Physical sciences, Radiation, Ion source, Physics - Plasma Physics, law.invention, Plasma Physics (physics.plasm-ph), Optics, Neutron generator, law, Gyrotron, Neutron source, Neutron, business, Instrumentation, Mathematical Physics
Abstract

In this paper we report on a high current density ion beam profile diagnostics with a slit-based system as a reliable method, capable of high thermal load applications. The task arose in frames of a point-like neutron source development for neutron radiography. In previous research, it was suggested to construct such a system as a D-D neutron generator based on the high current gasdynamic ion source, which utilises the plasma of electron cyclotron resonance discharge sustained by powerful millimeter wave gyrotron radiation. This device is able to produce focused D+ beams with a characteristic diameter of 1 mm, total current above 100 mA, and current density at a level of several A/cm^2. Study of such intense beams profile to obtain the best focusing efficiency and minimize neutron producing area appeared to be a challenging task. The paper also demonstrates the possibility of fast neutron imaging with a point-like powerful neutron generator (neutron yield on the level of 10^10 1/s)., 11 pages, 7 figures, submitted to JINST

Published
2020

7. Enhanced x-ray emission arising from laser-plasma confinement by a strong transverse magnetic field

Author

Amira Guediche, Julien Fuchs, S. A. Pikuz, J. Béard, K. F. Burdonov, S. Bolaños, W. P. Yao, M. V. Starodubtsev, Jack Hare, E. D. Filippov, G. Revet, Igor Yu. Skobelev, Denis Romanovsky, Sophia Chen, S. S. Makarov, Andrea Ciardi, University of Nizhny Novgorod, Joint Institute for High Temperatures of the RAS (JIHT), Russian Academy of Sciences [Moscow] (RAS), Lomonosov Moscow State University (MSU), Institute of Applied Physics of RAS, 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 (UMR_8112)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-CY Cergy Paris Université (CY), Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Horia Hulubei National Institute for Physics and Nuclear Engineering, Imperial College London, The National Research Nuclear University MEPhI (Moscow Engineering Physics Institute) [Moscow, Russia], Lobachevsky State University [Nizhni Novgorod], 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), 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), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)

Subjects
Materials science, Science, FOS: Physical sciences, Magnetically confined plasmas, 01 natural sciences, Article, 010305 fluids & plasmas, law.invention, Magnetization, law, Physics::Plasma Physics, 0103 physical sciences, Emissivity, Radiative transfer, 010306 general physics, [PHYS]Physics [physics], Multidisciplinary, Laser-produced plasmas, Plasma, Laser, Physics - Plasma Physics, Magnetic field, Plasma Physics (physics.plasm-ph), Transverse plane, Physics::Space Physics, Medicine, Atomic physics, Magnetohydrodynamics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

We analyze, using experiments and 3D MHD numerical simulations, the dynamics and radiative properties of a plasma ablated by a laser (1 ns, 10$^{12}$-10$^{13}$ W/cm$^2$) from a solid target, as it expands into a homogeneous, strong magnetic field (up to 30 T) transverse to its main expansion axis. We find that as soon as 2 ns after the start of the expansion, the plasma becomes constrained by the magnetic field. As the magnetic field strength is increased, more plasma is confined close to the target and is heated by magnetic compression. We also observe a dense slab that rapidly expands into vacuum after ~ 8 ns; however, this slab contains only ~ 2 % of the total plasma. As a result of the higher density and increased heating of the confined plasma, there is a net enhancement of the total x-ray emissivity induced by the magnetization., 15 pages, 4 figures, Supplementary Information, submitted to PRL

Published
2020
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8. Laboratory evidence for asymmetric accretion structure upon slanted matter impact in young stars

Author

Rosaria Bonito, Salvatore Orlando, O. Willi, Julien Fuchs, S. N. Chen, K. F. Burdonov, Mirela Cerchez, J. Béard, G. Revet, S. A. Pikuz, M. V. Starodubtsev, Rafael L. Rodríguez, E. D. Filippov, Costanza Argiroffi, Andrea Ciardi, G. Espinosa, S. Bolanos, Michal Smid, 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 intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112)), Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Burdonov K., Revet G., Bonito R., Argiroffi C., Beard J., Bolanos S., Cerchez M., Chen S.N., Ciardi A., Espinosa G., Filippov E., Pikuz S., Rodriguez R., Smid M., Starodubtsev M., Willi O., Orlando S., Fuchs J., 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), INAF - Osservatorio Astronomico di Palermo (OAPa), Istituto Nazionale di Astrofisica (INAF), Università degli studi di Palermo - University of Palermo, Heinrich Heine Universität Düsseldorf = Heinrich Heine University [Düsseldorf], Horia Hulubei National Institute for Physics and Nuclear Engineering, Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS Paris), 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), Universidad de las Palmas de Gran Canaria (ULPGC), Joint Institute for High Temperatures of the RAS (JIHT), Russian Academy of Sciences [Moscow] (RAS), Institute of Applied Physics (IAP, Nizhny Novgorod), Moscow State Engineering Physics Institute (MEPhI), Helmholtz-Zentrum Dresden-Rossendorf (HZDR), This work was partly done within the LABEX Plas@Par, the DIM ACAV funded by the Region Ilede-France, This work was supported by Grant No. 11-IDEX- 0004-02 from ANR (France), ANR-12-BS09-0025,SILAMPA,Simuler en laboratoire des écoulements de plasmas magnétisés pour l'astrophysique(2012), European Project: ERC787539,GENESIS, 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), 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), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), and Université Paris-Seine-Université Paris-Seine-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Shock wave, stars, Accretion, Magnetohydrodynamics (MHD), Young stellar object, FOS: Physical sciences, X-rays: stars, Astrophysics, 01 natural sciences, Shock waves, Settore FIS/05 - Astronomia E Astrofisica, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010306 general physics, Ejecta, 010303 astronomy & astrophysics, Chromosphere, Solar and Stellar Astrophysics (astro-ph.SR), Astrophysics::Galaxy Astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, pre-main sequence -X-rays, Astronomy and Astrophysics, Plasma, Planetary system, [PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], accretion disks -instabilities -magnetohydrodynamics (MHD) -shock waves -stars, Accretion (astrophysics), Stars, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Instabilities, Accretion disks, Stars: pre-main sequence, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

Aims. Investigating the process of matter accretion onto forming stars through scaled experiments in the laboratory is important in order to better understand star and planetary system formation and evolution. Such experiments can indeed complement observations by providing access to the processes with spatial and temporal resolution. A previous investigation revealed the existence of a two-component stream: a hot shell surrounding a cooler inner stream. The shell was formed by matter laterally ejected upon impact and refocused by the local magnetic field. That laboratory investigation was limited to normal incidence impacts. However, in young stellar objects, the complex structure of magnetic fields causes variability of the incident angles of the accretion columns. This led us to undertake an investigation, using laboratory plasmas, of the consequence of having a slanted accretion impacting a young star. Methods. Here, we used high power laser interactions and strong magnetic field generation in the laboratory, complemented by numerical simulations, to study the asymmetry induced upon accretion structures when columns of matter impact the surface of young stars with an oblique angle. Results. Compared to the scenario where matter accretes perpendicularly to the star surface, we observe a strongly asymmetric plasma structure, strong lateral ejecta of matter, poor confinement of the accreted material, and reduced heating compared to the normal incidence case. Thus, slanted accretion is a configuration that seems to be capable of inducing perturbations of the chromosphere and hence possibly influencing the level of activity of the corona.

Published
2020
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9. Influence of laser radiation polarisation on small-scale self-focusing in isotropic crystals

Author

A. A. Kochetkov, M. S. Kuzmina, Vladislav Ginzburg, Andrey Shaykin, Efim A. Khazanov, and K. F. Burdonov

Subjects
Materials science, Scale (ratio), business.industry, Isotropy, Statistical and Nonlinear Physics, Self-focusing, Radiation, Laser, 01 natural sciences, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, 010309 optics, Optics, law, 0103 physical sciences, Electrical and Electronic Engineering, 010306 general physics, business
Published
2017
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10. Formation of a plasma with the determining role of radiative processes in thin foils irradiated by a pulse of the PEARL subpetawatt laser

Author

G. V. Pokrovskii, Ivan V. Yakovlev, T. A. Pikuz, A. A. Kuzmin, I. A. Shaikin, M. V. Starodubtsev, A. D. Sladko, Vladislav Ginzburg, S. A. Pikuz, I. Yu. Skobelev, A. A. Soloviev, A. A. Shaikin, K. F. Burdonov, A. A. Eremeev, R. R. Osmanov, Efim A. Khazanov, Julien Fuchs, James Colgan, M. A. Alkhimova, A. M. Sergeev, and A. Ya. Faenov

Subjects
Materials science, Physics and Astronomy (miscellaneous), Solid-state physics, business.industry, Plasma, Laser, 01 natural sciences, 010305 fluids & plasmas, Ion, law.invention, Pulse (physics), Optics, Physics::Plasma Physics, law, 0103 physical sciences, Femtosecond, Radiative transfer, Irradiation, Atomic physics, 010306 general physics, business
Abstract

A superbright X-ray source with a radiation temperature of ~1.2 keV making it possible to create a solid-state plasma whose kinetics is determined by the radiative processes has been implemented under the impact of a 170-TW pulse of the PEARL femtosecond laser facility on an aluminum target with submicron thickness. The diagnostics of the created plasma is performed by X-ray spectral methods using spectral transitions in hollow multicharged ions.

Published
2017
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11. Alignment of solid targets under extreme tight focus conditions generated by an ellipsoidal plasma mirror

Author

A. A. Soloviev, Deepak Kumar, Vít Lédl, Stefan Weber, M. V. Starodubtsev, Motoaki Nakatsutsumi, S. E. Perevalov, Paul McKenna, K. F. Burdonov, Sushil Kumar Singh, Hannes Bohlin, L. Lancia, Alexander I. Kotov, Michael Morrissey, S. S. Makarov, Michal Smid, Gashaw Fente, S. A. Pikuz, Denis Romanovsky, David Neely, R. Kodama, Tomáš Laštovička, Julien Fuchs, Laboratoire pour l'utilisation des lasers intenses (LULI), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Magnification, 01 natural sciences, 010305 fluids & plasmas, law.invention, Optics, law, 0103 physical sciences, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Focal Spot Size, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Electrical and Electronic Engineering, 010306 general physics, QC, ComputingMilieux_MISCELLANEOUS, Physics, business.industry, Plasma, Laser, Ellipsoid, Atomic and Molecular Physics, and Optics, Numerical aperture, Nuclear Energy and Engineering, lcsh:QC770-798, Focus (optics), business, Intensity (heat transfer)
Abstract

The design of ellipsoidal plasma mirrors (EPMs) for the PEARL laser facility is presented. The EPMs achieve a magnification of 0.32 in focal spot size, and the corresponding increase in focused intensity is expected to be about 8. Designing and implementing such focusing optics for short-pulse (

Published
2019
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12. Laser-Produced Magnetic-Rayleigh-Taylor Unstable Plasma Slabs in a 20 T Magnetic Field

Author

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])

Subjects
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

Published
2019
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13. Experimental stand for studying the impact of laser-accelerated protons on biological objects

Author

A. M. Sergeev, A. A. Kuzmin, Ivan V. Yakovlev, Shihua Chen, I. A. Shaikin, Andrey Shaykin, Vladislav Ginzburg, A. A. Eremeev, A. A. Soloviev, R. R. Osmanov, A. Sladkov, A V Maslennikova, M. V. Starodubtsev, N I Ignatova, Efim A. Khazanov, Julien Fuchs, K. F. Burdonov, and G. Revet

Subjects
Physics, Proton, business.industry, Biological objects, Magnetic separation, Statistical and Nonlinear Physics, Electron, Radiation, Laser, 01 natural sciences, Atomic and Molecular Physics, and Optics, Power level, 010305 fluids & plasmas, Electronic, Optical and Magnetic Materials, law.invention, Hadron therapy, Optics, law, 0103 physical sciences, Electrical and Electronic Engineering, Atomic physics, 010306 general physics, business
Abstract

An original experimental stand is presented, aimed at studying the impact of high-energy protons, produced by the laser-plasma interaction at a petawatt power level, on biological objects. In the course of pilot experiments with the energy of laser-accelerated protons up to 25 MeV, the possibility is demonstrated of transferring doses up to 10 Gy to the object of study in a single shot with the magnetic separation of protons from parasitic X-ray radiation and fast electrons. The technique of irradiating the cell culture HeLa Kyoto and measuring the fraction of survived cells is developed. The ways of optimising the parameters of proton beams and the suitable methods of their separation with respect to energy and transporting to the studied living objects are discussed. The construction of the stand is intended for the improvement of laser technologies for hadron therapy of malignant neoplasms.

Published
2016
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14. Nd : glass rod laser with an output energy of 500 J

Author

A. A. Kuzmin, Efim A. Khazanov, I. A. Shaikin, Andrey Shaykin, and K. F. Burdonov

Subjects
010302 applied physics, Materials science, business.industry, chemistry.chemical_element, Statistical and Nonlinear Physics, Laser, 01 natural sciences, Neodymium, Atomic and Molecular Physics, and Optics, Rod, Electronic, Optical and Magnetic Materials, Pulse (physics), Phosphate glass, law.invention, 010309 optics, Optics, chemistry, law, 0103 physical sciences, Electrical and Electronic Engineering, Multistage amplifier, Parametric oscillator, business, Energy (signal processing)
Abstract

The energy of two orthogonally polarised pulses injected into an available multistage amplifier based on neodymium phosphate glass rods was increased from 300 to 500 J (in both pulses). The second output pulse with an energy of 200 J will be used to pump an additional parametric amplifier of a petawatt laser.

Published
2016
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15. Using a multimode laser in interferometry of ultrasmall phase inhomogeneities

Author

M. V. Starodubtsev, K. F. Burdonov, and Alexander Soloviev

Subjects
0301 basic medicine, Fiber diameter, Materials science, Physics and Astronomy (miscellaneous), business.industry, Phase (waves), Optical interferometer, 01 natural sciences, 03 medical and health sciences, Interferometry, 030104 developmental biology, Optics, 0103 physical sciences, Calibration, Sensitivity (control systems), 010306 general physics, business, Astrophysics::Galaxy Astrophysics
Abstract

We describe a method for measuring the concentration of low-density gas jets with the aid of a multibeam optical interferometer. Sensitivity with respect to optical thickness distortions achieved in experiments was on a level of λ/600. The proposed method is well suited for the calibration of gas targets used in experiments on laser–plasma interactions.

Published
2016
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16. Experimental study of strongly mismatched regime of laser-driven wakefield acceleration

Author

A. A. Soloviev, A. A. Kochetkov, Ivan V. Yakovlev, A. V. Kotov, I. A. Shaikin, A. P. Korobeinikova, I. Yu. Kostyukov, D. S. Romanovskiy, M. V. Starodubtsev, A. A. Golovanov, A. A. Kuzmin, Andrey Shaykin, Vladislav Ginzburg, Efim A. Khazanov, S. E. Perevalov, and K. F. Burdonov

Subjects
Physics, Acceleration, Optics, Nuclear Energy and Engineering, business.industry, law, Condensed Matter Physics, business, Laser, law.invention
Published
2020
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17. Comparison of Dimensionless Parameters in Astrophysical MHD Systems and in Laboratory Experiments

Author

K. F. Burdonov, E. P. Kurbatov, Julien Fuchs, G. Revet, Dmitry Bisikalo, M. V. Starodubtsev, Shouyuan Chen, A. A. Solov’ev, Andrea Ciardi, Institute of Astronomy of the Russian Academy of Sciences (INASAN), Institute of Applied Physics, Université Paris Cité (UPCité), Observatoire de Paris, Université Paris sciences et lettres (PSL), Laboratoire pour l'utilisation des lasers intenses (LULI), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, AM Herculis, Accretion (meteorology), Astronomy and Astrophysics, Plasma, 01 natural sciences, Magnetic field, Computational physics, Intermediate polar, Physics::Plasma Physics, Space and Planetary Science, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Polar, Astrophysics::Earth and Planetary Astrophysics, Magnetohydrodynamics, 010306 general physics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], 010303 astronomy & astrophysics, Dimensionless quantity
Abstract

International audience; Estimates of typical parameters of accretion flows in the representative intermediate polar EX Hydrae, the polar AM Herculis, and the "hot Jupiter" WASP-12b are presented. Dimensionless parameters of astrophysical systems are compared with those of laboratory experiments on laser ablation in magnetic fields. It is shown that laboratory simulations of astrophysical flows is possible in principle, provided that some adjustment to the magnetic field, plasma density, and plasma velocity are made.

Published
2018
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18. Detailed characterization of laser-produced astrophysically-relevant jets formed via a poloidal magnetic nozzle

Author

A. A. Soloviev, K. Naughton, Benjamin Khiar, Drew Higginson, R. Riquier, E. D. Filippov, Oliver Portugall, Caterina Riconda, G. Revet, S. A. Pikuz, Tommaso Vinci, S. N. Ryazantsev, I. Yu. Skobelev, D. Khaghani, M. Blecher, H. Pépin, Oswald Willi, Marco Borghesi, J. Béard, K. F. Burdonov, M. V. Starodubtsev, Julien Fuchs, S. N. Chen, Andrea Ciardi, Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), 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 Pulsés (LNCMP), 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), Queen's University [Belfast] (QUB), 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), Joint Institute for High Temperatures of the RAS (JIHT), Russian Academy of Sciences [Moscow] (RAS), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), 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), Don State Technical University, Institute of Applied Physics (IAP, Nizhny Novgorod), Dipartimento di Fisica 'Giuseppe Occhialini' = Department of Physics 'Giuseppe Occhialini' [Milano-Bicocca], Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB), Institut für Laser und Plasmaphysik, Heinrich Heine Universität Düsseldorf = Heinrich Heine University [Düsseldorf], École normale supérieure - Paris (ENS Paris), 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), and Università degli Studi di Milano-Bicocca [Milano] (UNIMIB)

Subjects
Astrophysical plasmas, Nuclear and High Energy Physics, Tokamak, Atmospheric-pressure plasma, Outflows, 01 natural sciences, 010305 fluids & plasmas, law.invention, Magnetohydrodynamics, law, Physics::Plasma Physics, 0103 physical sciences, Jets, Magnetic pressure, 010306 general physics, Magnetosphere particle motion, ComputingMilieux_MISCELLANEOUS, Physics, [PHYS]Physics [physics], Jet (fluid), Radiation, Plasma, Magnetic field, [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con], Atomic physics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Laser-plasma interactions
Abstract

The collimation of astrophysically-relevant plasma ejecta in the form of narrow jets via a poloidal magnetic field is studied experimentally by irradiating a target situated in a 20 T axial magnetic field with a 40 J, 0.6 ns, 0.7 mm diameter, high-power laser. The dynamics of the plasma shaping by the magnetic field are studied over 70 ns and up to 20 mm from the source by diagnosing the electron density, temperature and optical self-emission. These show that the initial expansion of the plasma is highly magnetized, which leads to the formation of a cavity structure when the kinetic plasma pressure compresses the magnetic field, resulting in an oblique shock [A. Ciardi et al., Phys. Rev. Lett. 110, 025002 (2013)]. The resulting poloidal magnetic nozzle collimates the plasma into a narrow jet [B. Albertazzi et al., Science 346, 325 (2014)]. At distances far from the target, the jet is only marginally magnetized and maintains a high aspect ratio due to its high Mach-number (M∼20) and not due to external magnetic pressure. The formation of the jet is evaluated over a range of laser intensities (1012–1013 W/cm2), target materials and orientations of the magnetic field. Plasma cavity formation is observed in all cases and the viability of long-range jet formation is found to be dependent on the orientation of the magnetic field.

Published
2017
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19. Laser amplifier based on a neodymium glass rod 150 mm in diameter

Author

A.V. Charukhchev, A. A. Kuzmin, A. A. Soloviev, Andrey Shaykin, Andrey P. Fokin, Efim A. Khazanov, I. A. Shaikin, and K. F. Burdonov

Subjects
Materials science, business.industry, Amplifier, Single pulse, chemistry.chemical_element, Statistical and Nonlinear Physics, Laser, Neodymium, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Pulse (physics), law.invention, Optics, chemistry, law, Stored energy, Electrical and Electronic Engineering, Pulse energy, business, Bandwidth-limited pulse
Abstract

A unique large-aperture neodymium glass rod amplifier is experimentally studied. The small-signal gain distribution is measured at different pump energies. The aperture-averaged gain is found to be 2.3. The stored energy (500 J), the maximum possible pump pulse repetition rate, and the depolarisation in a single pulse and in a series of pulses with a repetition rate of one pulse per five minutes are calculated based on the investigations performed. It is shown that the use of this amplifier at the exit of the existing laser can increase the output pulse energy from 300 to 600 J.

Published
2014
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20. Experimental evidence for short-pulse laser heating of solid-density target to high bulk temperatures

Author

Vladislav Ginzburg, Ivan V. Yakovlev, A. V. Korzhimanov, A. A. Eremeev, A. A. Soloviev, S. A. Pikuz, M. V. Starodubtsev, A. A. Kuzmin, G. V. Pokrovskiy, Tatiana Pikuz, A. Sladkov, G. Revet, Efim A. Khazanov, Andrey Shaykin, Julien Fuchs, S. N. Chen, K. F. Burdonov, I. A. Shaikin, and R. R. Osmanov

Subjects
Chirped pulse amplification, Coupling, Resistive touchscreen, Multidisciplinary, Materials science, business.industry, lcsh:R, lcsh:Medicine, Laser, 01 natural sciences, Article, 010305 fluids & plasmas, law.invention, Pulse (physics), Optics, law, 0103 physical sciences, State of matter, Slab, Deposition (phase transition), lcsh:Q, 010306 general physics, business, lcsh:Science
Abstract

Heating efficiently solid-density, or even compressed, matter has been a long-sought goal in order to allow investigation of the properties of such state of matter of interest for various domains, e.g. astrophysics. High-power lasers, pinches, and more recently Free-Electron-Lasers (FELs) have been used in this respect. Here we show that by using the high-power, high-contrast “PEARL” laser (Institute of Applied Physics-Russian Academy of Science, Nizhny Novgorod, Russia) delivering 7.5 J in a 60 fs laser pulse, such coupling can be efficiently obtained, resulting in heating of a slab of solid-density Al of 0.8 µm thickness at a temperature of 300 eV, and with minimal density gradients. The characterization of the target heating is achieved combining X-ray spectrometry and measurement of the protons accelerated from the Al slab. The measured heating conditions are consistent with a three-temperatures model that simulates resistive and collisional heating of the bulk induced by the hot electrons. Such effective laser energy deposition is achieved owing to the intrinsic high contrast of the laser which results from the Optical Parametric Chirped Pulse Amplification technology it is based on, allowing to attain high target temperatures in a very compact manner, e.g. in comparison with large-scale FEL facilities.

Published
2016

21. Post-pulse generation effect in Q-switched lasers

Author

Andrey Shaykin, K. F. Burdonov, and Efim A. Khazanov

Subjects
Distributed feedback laser, Materials science, business.industry, Laser pumping, Injection seeder, Laser, law.invention, Longitudinal mode, Optics, law, Diode-pumped solid-state laser, Physics::Accelerator Physics, Laser power scaling, business, Tunable laser
Abstract

We revealed experimentally the generation of a second giant pulse at the neighboring longitudinal mode in an Nd:YLF Q-switched laser and implemented new method of longitudinal mode selection based on this effect.

Published
2016
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22. Fast electron generation using PW-class PEARL facility

Author

I. Yu. Kostyukov, E. N. Nerush, G.A. Luchinin, O. V. Palashov, Arkady Kim, Efim A. Khazanov, A. V. Korzhimanov, Andrey Shaykin, A.V. Kirsanov, Arkady Gonoskov, A. A. Soloviev, K. F. Burdonov, Vladislav Ginzburg, A. K. Poteomkin, M. V. Starodubtsev, V. V. Zelenogorsky, Vladimir Lozhkarev, Ivan V. Yakovlev, E. V. Katin, A.N. Mal'shakov, A. M. Sergeev, and M.A. Martyanov

Subjects
Physics, Nuclear and High Energy Physics, Jet (fluid), business.industry, Electron, Laser, law.invention, Pulse (physics), PEARL (programming language), Optics, law, Cathode ray, Physics::Accelerator Physics, Supersonic speed, business, Instrumentation, computer, Beam (structure), computer.programming_language
Abstract

We use a PW-class PEARL facility to study fast electron beam generation during high intensity laser pulse interaction with a supersonic gas jet. We show that electron beams with several hundreds of MeV and relatively large charges, of hundreds of pC and more, can be effectively produced without any guiding structures. PIC simulations also confirm the obtained experimental data and provide optimized conditions of laser–plasma interaction for high-charged beam production.

Published
2011
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23. A New Method of Longitudinal Mode Selection in Q-switched Lasers

Author

Efim A. Khazanov, K. F. Burdonov, and Andrey Shaykin

Subjects
Physics, business.industry, Injection seeder, Laser, Q-switching, law.invention, Pulse (physics), Longitudinal mode, Optics, Modulation, law, business, Frequency modulation, Tunable laser
Abstract

The effect of post-pulse (the second giant pulse at the neighboring longitudinal mode) generation in a Q-switched laser was revealed in experiment. Based on this effect, a new method of longitudinal mode selection was implemented.

Published
2015
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24. 150MM diameter Nd:glass rod laser amplifier: characterization and prospects

Author

Andrey Shaykin, Alexander Soloviev, I. A. Shaikin, Alexey Kuzmin, Efim A. Khazanov, and K. F. Burdonov

Subjects
Thermal shock, Materials science, business.industry, Aperture, Amplifier, Laser pumping, Laser, law.invention, Pulse (physics), Lens (optics), Optics, law, Focal length, business
Abstract

We present the results of the investigation of a Nd:glass rod laser amplifier 320 mm long and 150 mm in diameter. The gain and depolarization distributions over the amplifier aperture as well as the stored energy have been measured for different values of the pump energy. The small signal gain averaged over the rod aperture was 2.3 when the pump energy was 48 kJ. The corresponding stored energy was 500 J. We have determined the maximal pulse repetition rate that is quiet safe from the point of the thermal shock damage. It is about 1 shot per 5 minutes. The calculated focal length of the thermal lens exceeds 1.5 km in such a regime. We have shown that the use of a couple of such amplifiers gives the possibility to increase the energy of laser pulses up to 650 J.

Published
2014
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25. Two-screen single-shot electron spectrometer for laser wakefield accelerated electron beams

Author

A. A. Soloviev, Efim A. Khazanov, E. N. Nerush, I. Yu. Kostyukov, M. V. Starodubtsev, Andrey Shaykin, and K. F. Burdonov

Subjects
Physics, Electron spectrometer, Spectrometer, business.industry, Particle accelerator, Electron, Laser, Linear particle accelerator, law.invention, Optics, law, Magnet, Physics::Accelerator Physics, Plasma diagnostics, Atomic physics, business, Instrumentation
Abstract

The laser wakefield acceleration electron beams can essentially deviate from the axis of the system, which distinguishes them greatly from beams of conventional accelerators. In case of energy measurements by means of a permanent-magnet electron spectrometer, the deviation angle can affect accuracy, especially for high energies. A two-screen single-shot electron spectrometer that correctly allows for variations of the angle of entry is considered. The spectrometer design enables enhancing accuracy of measuring narrow electron beams significantly as compared to a one-screen spectrometer with analogous magnetic field, size, and angular acceptance.

Published
2011

26. LWFA Experiments at PEARL Facility

Author

Alexander A. Sergeev, K. F. Burdonov, Ivan V. Yakovlev, Alex Kirsanov, Andrey Shaykin, G.A. Luchinin, E. V. Katin, Vladislav Ginzburg, A.N. Mal'shakov, Oleg Palashov, M. V. Starodubtsev, Vladimir Lozhkarev, Mikhail A. Martyanov, Alexander Soloviev, Anatoly Poteomkin, and Efim A. Khazanov

Subjects
Physics, business.industry, Thomson scattering, Plasma, Electron, Laser, law.invention, Nuclear physics, Acceleration, PEARL (programming language), Optics, law, Physics::Accelerator Physics, Physics::Atomic Physics, business, computer, Laser beams, computer.programming_language
Abstract

The results of laser wakefield acceleration experimental series carried out at PEARL (PEtawatt pArametrical Laser) system are discussed in the paper. The electron beams with energies up to 300 MeV were observed.

Published
2011
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27. A novel technique for longitudinal mode selection in Q-switched lasers

Author

Andrey Shaykin, K. F. Burdonov, and Efim A. Khazanov

Subjects
Novel technique, Physics, Longitudinal mode, Optics, Physics and Astronomy (miscellaneous), law, business.industry, Laser, business, Instrumentation, Selection (genetic algorithm), Pulse (physics), law.invention
Abstract

We revealed experimentally and explained the generation of a second giant pulse at the neighboring longitudinal mode in an Nd:YLF Q-switched laser. The delay between two pulses was about 100 ns. Based on this effect, a new method of longitudinal mode selection was implemented.

Published
2015
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28. Laser-plasma experiments on solid-density target heating to high bulk temperatures at PEARL facility

Author

A. V. Korzhimanov, M. V. Starodubtsev, R. R. Osmanov, S. A. Pikuz, Vladislav Ginzburg, A. A. Eremeev, I. Shaykin, Efim A. Khazanov, A. A. Kuzmin, Julien Fuchs, S. N. Chen, Andrey Shaykin, Ivan V. Yakovlev, Alexander Soloviev, A. Sladkov, G. Revet, and K. F. Burdonov

Subjects
Materials science, Solid density, Isochoric process, media_common.quotation_subject, Analytical chemistry, 02 engineering and technology, Plasma, 021001 nanoscience & nanotechnology, Laser, 01 natural sciences, Temperature measurement, law.invention, 010309 optics, law, 0103 physical sciences, Contrast (vision), 0210 nano-technology, FOIL method, media_common
Abstract

We show that almost isochoric heating to high temperatures (300 eV) of $\mu $m-thick solid-density foil can be achieved in a compact and efficient manner using an ultrahigh contrast, high-power, ultra-short duration laser.

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