Publications

2017

• Sustainable computational science: the ReScience initiative
  
  • Rougier Nicolas P.
  • Hinsen Konrad
  • Alexandre Frédéric
  • Arildsen Thomas
  • Barba Lorena
  • Benureau Fabien C. Y.
  • Brown C. Titus
  • de Buyl Pierre
  • Caglayan Ozan
  • Davison Andrew P.
  • Delsuc Marc André
  • Detorakis Georgios
  • Diem Alexandra K.
  • Drix Damien
  • Enel Pierre
  • Girard Benoît
  • Guest Olivia
  • Hall Matt G.
  • Henriques Rafael Neto
  • Hinaut Xavier
  • Jaron Kamil S
  • Khamassi Mehdi
  • Klein Almar
  • Manninen Tiina
  • Marchesi Pietro
  • Mcglinn Dan
  • Metzner Christoph
  • Petchey Owen L.
  • Plesser Hans Ekkehard
  • Poisot Timothée
  • Ram Karthik
  • Ram Yoav
  • Roesch Etienne
  • Rossant Cyrille
  • Rostami Vahid
  • Shifman Aaron
  • Stachelek Jemma
  • Stimberg Marcel
  • Stollmeier Frank
  • Vaggi Federico
  • Viejo Guillaume
  • Vitay Julien
  • Vostinar Anya
  • Yurchak Roman
  • Zito Tiziano
  PeerJ Computer Science, PeerJ, 2017, 3, pp.e142. Computer science offers a large set of tools for prototyping, writing, running, testing, validating, sharing and reproducing results, however computational science lags behind. In the best case, authors may provide their source code as a compressed archive and they may feel confident their research is reproducible. But this is not exactly true. James Buckheit and David Donoho proposed more than two decades ago that an article about computational results is advertising, not scholarship. The actual scholarship is the full software environment, code, and data that produced the result. This implies new workflows, in particular in peer-reviews. Existing journals have been slow to adapt: source codes are rarely requested, hardly ever actually executed to check that they produce the results advertised in the article. ReScience is a peer-reviewed journal that targets computational research and encourages the explicit replication of already published research, promoting new and open-source implementations in order to ensure that the original research can be replicated from its description. To achieve this goal, the whole publishing chain is radically different from other traditional scientific journals. ReScience resides on GitHub where each new implementation of a computational study is made available together with comments, explanations, and software tests. (10.7717/peerj-cs.142)
  DOI : 10.7717/peerj-cs.142
• Enhancement of Quasistationary Shocks and Heating via Temporal Staging in a Magnetized Laser-Plasma Jet
  
  • Higginson D. p.
  • Khiar B.
  • Revet G.
  • Béard Jérome
  • Blecher M.
  • Borghesi M.
  • Burdonov K.
  • Chen S. n.
  • Filippov E.
  • Khaghani D.
  • Naughton K.
  • Pépin H.
  • Pikuz S.
  • Portugall Oliver
  • Riconda C.
  • Riquier R.
  • Rodriguez R.
  • Ryazantsev S. n.
  • Skobelev I. yu.
  • Soloviev A. N.
  • Starodubtsev M.
  • Vinci T.
  • Willi O.
  • Ciardi A.
  • Fuchs J.
  Physical Review Letters, American Physical Society, 2017, 119 (25). (10.1103/PhysRevLett.119.255002)
  DOI : 10.1103/PhysRevLett.119.255002
• Structured targets for advanced laser-driven sources
  
  • Fedeli L.
  • Formenti A
  • Cialfi L
  • Sgattoni A.
  • Cantono G.
  • Passoni M.
  Plasma Physics and Controlled Fusion, IOP Publishing, 2017, 60 (1), pp.014013. Structured targets offer great control over ultra-intense laser-plasma interaction, allowing the optimization of laser-target coupling for specific applications. By means of particle-in-cell simulations we investigated three applications in particular: high-order harmonic generation (HHG) with grating targets, enhanced target coupling with multilayer targets and the generation of intense laser-driven terahertz (THz) pulses with structured targets. The irradiation of a solid grating target at the resonance angle for surface plasmon excitation enhances the HHG with respect to flat targets. Multilayer targets consisting of solid foils coated with a very low-density near-critical layer lead to a strong laser absorption and hot electron production that can improve laser-driven ion acceleration. We also explored the generation of THz radiation showing how using either gratings or multilayer targets the emission can be strongly enhanced with respect to simple flat targets. (10.1088/1361-6587/aa8a54)
  DOI : 10.1088/1361-6587/aa8a54
• Laboratory unraveling of matter accretion in young stars
  
  • Revet Guilhem
  • Chen Sophia
  • Bonito Rosaria
  • Khiar Benjamin
  • Filippov Evgeny
  • Argiroffi Costanza
  • Higginson Drew
  • Orlando Salvatore
  • Béard Jérome
  • Blecher Marius
  • Borghesi Marco
  • Burdonov Konstantin
  • Khaghani Dimitri
  • Naughton Kealan
  • Pépin Henri
  • Portugall Oliver
  • Riquier Raphaël
  • Rodriguez Rafael
  • Ryazantsev Sergei
  • Yu. Skobelev Igor
  • Soloviev Alexander
  • Willi Oswald
  • Pikuz Sergey
  • Ciardi Andrea
  • Fuchs Julien
  Science Advances, American Association for the Advancement of Science (AAAS), 2017, 3 (11), pp.e1700982. Accretion dynamics in the formation of young stars is still a matter of debate because of limitations in observations and modeling. Through scaled laboratory experiments of collimated plasma accretion onto a solid in the presence of a magnetic field, we open a first window on this phenomenon by tracking, with spatial and temporal resolution, the dynamics of the system and simultaneously measuring multiband emissions. We observe in these experiments that matter, upon impact, is ejected laterally from the solid surface and then refocused by the magnetic field toward the incoming stream. This ejected matter forms a plasma shell that envelops the shocked core, reducing escaped x-ray emission. This finding demonstrates one possible structure reconciling current discrepancies between mass accretion rates derived from x-ray and optical observations, respectively. (10.1126/sciadv.1700982)
  DOI : 10.1126/sciadv.1700982
• Collisionless shocks in the context of Laboratory Astrophysics
  
  • Grassi Anna
  , 2017. The work presented in this thesis belongs to the general framework of Laboratory Astrophysics. We address various aspects of the physics of collisionless shocks developing in the presence of relativistic plasma flows, in configurations of interest for the astrophysical and the laser-plasma interaction (LPI) communities. The approach used throughout this thesis relied on both analytical modeling and high-performance kinetic simulations, a central tool to describe LPI processes as well as the non-linear physics behind shock formation. The PIC code SMILEI has been widely used and developed during this work. Three physical configurations are studied. First we consider the Weibel instability driven by two counter-streaming electron beams aligned with an external magnetic field. The linear and non-linear phases are explained using theoretical models confirmed by simulations.Then the generation of non-collisional shocks during the interaction of two relativistic plasma pairs is studied in the presence of a perpendicular magnetic field. We focus on the comparison of theoretical predictions for macroscopic variables with the simulation results, as well as on the definition and measurement of the shock formation time, all of which are of great importance for future experiments.Finally, we proposed a scheme to produce, in the laboratory, the ion-Weibel-instability with the use of an ultra-high-intensity laser. The produced flows are faster and denser than in current experiments, leading to a larger growth rate and stronger magnetic fields. These results are important for the LPI at very high intensity. (10.70675/555a8599zbd01z4aa9z89e9z14e9587edd11)
  DOI : 10.70675/555a8599zbd01z4aa9z89e9z14e9587edd11
• Etude expérimentale des effets multi-faisceaux sur l'instabilité de diffusion Brillouin stimulée
  
  • Neuville Cedric
  , 2017. Les installations laser dimensionnées pour réaliser des expériences de fusion thermonucléaire par confinement inertiel laser utilisent de nombreux faisceaux laser pour répondre à des contraintes de symétrie d'irradiation et pour déposer suffisamment d'énergie dans la matière. Malheureusement, le croisement des faisceaux laser dans un plasma impactent leurs propagations. Quand un faisceau laser se propage dans un plasma, il peut se coupler aux ondes acoustiques ioniques et diffuser une fraction importante de son énergie par diffusion Brillouin stimulée. Aussi bien les niveaux que les directions de ces diffusions sont profondément modifiés lorsque les faisceaux laser se croisent. Ce manuscrit présente l'étude expérimentale de deux types de modification multi-faisceaux :- en utilisant la flexibilité de l'installation laser LULI2000 (Laboratoire d'Utilisation des Lasers Intenses, Palaiseau, France), nous avons étudié le transfert d'énergie entre deux et trois faisceaux laser ;- les soixante faisceaux laser de l'installation OMEGA (Laboratory for Laser Energetics, Rochester, Etats-Unis) nous ont permis d'observer les diffusions produites par des instabilités Brillouin collectives dans des plasmas plans en géométrie ouverte et à l'entrée de cavités d'expériences de fusion.Ces deux mécanismes peuvent drastiquement redistribuer l'énergie laser incidente en échangeant jusqu’à 30% de l'énergie entre les faisceaux ou en diffusant plus de 10% de l'énergie laser dans des directions inhabituelles. (10.70675/31a359c0z31d9z4885z98ecz3bb04d5a1318)
  DOI : 10.70675/31a359c0z31d9z4885z98ecz3bb04d5a1318
• Investigations of high pressure phase diagrams of MgO-SiO2 systems with laser shock compression
  
  • Bolis Riccardo Maria
  , 2017. Two decades of exoplanet discoveries brought the physics of planetary interiors among the topics of broad and current interests. To advance in this field, one of the key ingredient is the knowledge of the equation of states and physical properties of planetary constituents. At the extreme conditions of planetary interiors ( 1-100 Mbar, 10^3-10^4 K), matter lies in the Warm Dense Matter (WDM) regime and theoretical descriptions are not trivial. Important progress have been done with ab-initio calculations based on differential functional theories, but such calculations need to be validated by experiments.In this thesis, we experimentally characterized phase diagrams and physical properties of MgO, MgSiO3 and Mg2SiO4 at conditions relevant for planetary science (0.5-10 Mbar). The studied compounds are the Mg end members of (Fe, Mg)SiO3 and (Fe, Mg)2SiO4 that are among the most abundant components of Earth’s mantle and are also thought to be abundant in Super-Earth’s mantle and giant planet cores. To bring these materials to planetary interior conditions we performed laser shock compression experiments at three high power laser facilities: LULI2000 (France), GEKKOXII (Japan), MEC at LCLS(USA). At LULI2000 and GEKKOXII we investigated the liquid properties and melting of MgO, MgSiO3 and Mg2SiO4 using decaying shocks coupled to visible diagnostics. At LULI2000 we studied with XANES spectroscopy MgO in the WDM regime highlighting its metallisation mechanism and structural properties in the liquid phase. Finally, at the MEC end station of LCLS, we used X-ray diffraction to measure shock induced structural changes on MgSiO3 and Mg2SiO4 in the solid region of their phase diagrams. Altogether these works, obtained with different diagnostics, imply a revision of the phase diagrams of the studied compounds. In particular we determined a new experimental melting point for MgO (at 470 ± 40 GPa and 9860 ± 810 K), we ruled out the occurrence of an MgSiO3 liquid-liquid transition (supposed to occur at ~ 400 GPa along the Hugoniot) and we evidenced for the first time the occurrence of an amorphous phase along the Forsterite (Mg2SiO4 crystal) Hugoniot (at ~50 GPa). (10.70675/521b7282zd172z4138z8e18z1cb59b21c53c)
  DOI : 10.70675/521b7282zd172z4138z8e18z1cb59b21c53c
• Towards Coherent Combination of 61 Fiber Amplifiers
  
  • Heilmann Anke
  • Le Dortz Jérémy
  • Bellanger Séverine
  • Daniault Louis
  • Fsaifes Ihsan
  • Antier Marie
  • Bourderionnet Jérôme
  • Larat Christian
  • Lallier Eric
  • Brignon Arnaud
  • Simon-Boisson Christophe
  • Chanteloup Jean-Christophe
  , 2017, pp.JM5A.14. We report the first coherent combination of seven fiber amplifiers in the femtosecond regime using an interferometric phase measurement. Details of the setup will be presented, as well as first results evaluating the combination efficiency. (10.1364/ASSL.2017.JM5A.14)
  DOI : 10.1364/ASSL.2017.JM5A.14
• Inertial confinement fusion for energy: overview of the ongoing experimental, theoretical and numerical studies
  
  • Jacquemot S.
  Nuclear Fusion, IOP Publishing, 2017, 57 (10), pp.102024. (10.1088/1741-4326/aa6d2d)
  DOI : 10.1088/1741-4326/aa6d2d
• General features of experiments on the dynamics of laser-driven electron–positron beams
  
  • Warwick J.R.
  • Alejo A.
  • Dzelzainis T.
  • Schumaker W.
  • Doria D.
  • Romagnani L.
  • Poder K.
  • Cole J.M.
  • Yeung M.
  • Krushelnick K.
  • Mangles S.P.D.
  • Najmudin Z.
  • Samarin G.M.
  • Symes D.
  • Thomas A.G.R.
  • Borghesi M.
  • Sarri G.
  , 2018, 909, pp.95-101. The experimental study of the dynamics of neutral electron–positron beams is an emerging area of research, enabled by the recent results on the generation of this exotic state of matter in the laboratory. Electron–positron beams and plasmas are believed to play a major role in the dynamics of extreme astrophysical objects such as supermassive black holes and pulsars. For instance, they are believed to be the main constituents of a large number of astrophysical jets, and they have been proposed to significantly contribute to the emission of gamma-ray bursts and their afterglow. However, despite extensive numerical modelling and indirect astrophysical observations, a detailed experimental characterisation of the dynamics of these objects is still at its infancy. Here, we will report on some of the general features of experiments studying the dynamics of electron–positron beams in a fully laser-driven setup. (10.1016/j.nima.2018.02.054)
  DOI : 10.1016/j.nima.2018.02.054
• Shock generation comparison with planar and hemispherical targets in shock ignition relevant experiment
  
  • Baton S. D.
  • Le Bel E.
  • Brygoo S.
  • Ribeyre X.
  • Rousseaux C.
  • Breil J.
  • Koenig M.
  • Batani D.
  • Raffestin D.
  Physics of Plasmas, American Institute of Physics, 2017, 24 (9), pp.092708. We performed an experiment on the " Ligne d'Intégration Laser " facility to produce strong shocks with plasma conditions relevant for the Shock Ignition approach to Inertial Confinement Fusion. Two kinds of target have been used: planar and hemispherical. We observe an increase of the shock velocity in hemispherical geometry, which entails a fairly planar shock despite the Gaussian focal spot. Numerical results reproduce in the successful way the shock dynamics in the two cases, indicating, for laser intensities around 1.5x10¹⁵ W/cm² at 3ω, an ablation pressure of (90 ± 20) Mbar and (120 ± 20) Mbar in planar and hemispherical geometry respectively. (10.1063/1.4989525)
  DOI : 10.1063/1.4989525
• Ejecta from periodical grooves in tin foils under laser-driven shock loading
  
  • Prudhomme G.
  • Franzkowiak J.-E.
  • de Resseguier T.
  • Brambrink E.
  • Roland C.
  • Loison Didier
  • Lescoute E.
  • Sollier A.
  , 2018, 1979, pp.080010. Laser-driven shock loading is a versatile, low destructive method to study material dynamic behaviors with an efficient repetitive rate. In these experiments, compared with the more conventional high-explosive or impact-based techniques, all the scales are reduced (few ns shock duration, a few mm planar loaded area) while the shock pressure may reach several tens of GPa. This configuration makes possible the use of many diagnostics with limited exposition to generated fragments. We present recent experiments of material ejection under laser-driven shock loading. The target is a thin plate of Tin with periodical grooves of few tens of μm in its rear surface, in order to induce solid or liquid micro-jetting. These jets turn into a cloud of μm-sized particles. Depending on surface roughness, the velocity and the density of the cloud vary. The density of the cloud is estimated thanks to a new high-resolution X-ray imaging with a laser-driven source; while optical shadowgraphy observes the displacement of the fastest particles. Thus, μm-structures in the particles cloud and in the target can be revealed. © 2018 Author(s). (10.1063/1.5044852)
  DOI : 10.1063/1.5044852
• Picosecond radiography combined with other techniques to investigate microjetting from laser shock-loaded grooves
  
  • de Resseguier T.
  • Roland C.
  • Prudhomme G.
  • Brambrink E.
  • Franzkowiak J.E.
  • Loison Didier
  • Lescoute E.
  • Sollier A.
  • Berthe Laurent
  , 2018, 1979, pp.080011. Debris ejection upon shock breakout at a rough surface is a key issue for many applications, including pyrotechnics and inertial confinement fusion. For a few years, we have used laser driven shocks to investigate microjetting in metallic samples with calibrated grooves in their free surface. Fast transverse optical shadowgraphy, time-resolved measurements of both planar surface and jet tip velocities, and post-shock analysis of recovered material have provided data over ranges of small spatial and temporal scales, short loading pulses (ns-order) and extremely high strain rates. The new experiment presented here involves two laser beams in a pump-probe configuration. Picosecond laser irradiation of a thin copper wire generates x-rays which are used to radiograph the microjets expanding from single grooves in tin and copper samples shock-loaded by a longer, nanosecond laser pulse. Such ultrashort radiography can be used to infer the density gradients along the jets as well as inside the samples deep beneath the grooves. Thus, combining this x-ray probe with the other experimental techniques mentioned above provides a more complete insight into the physics of microjetting at very high loading rates and the ballistic properties of the resulting ejecta. © 2018 Author(s). (10.1063/1.5044853)
  DOI : 10.1063/1.5044853
• Beam-plasma instability and density holes: Langmuir wave-packet formation and particle acceleration
  
  • Sgattoni A.
  • Amiranoff François
  • Briand C.
  • Henri Pierre
  • Grech M.
  • Riconda C.
  Physics of Plasmas, American Institute of Physics, 2017, 24 (7). The role of density perturbations of the background plasma in the development of Langmuir waves generated by beam-plasma instabilities is a very debated issue in space physics. The presence of clumpy electrostatic wave-packets (in particular Langmuir waves), from in situ observations, is indeed puzzling. Several processes have been proposed to explain the formation of waveforms, such as Stochastic Growth Theory and trapping in eigenmodes. Here we explore another mechanism considering the seeding of the beam-plasma instability by density holes. We have performed several 1D-1V Vlasov simulations in the electrostatic limit. We show that in the presence of a density hole, a large amplitude solitary wave-packet of Langmuir waves is formed and that it evolves towards clumpier waveforms. Moreover, the large-amplitude wave-packets generated near the hole can reach saturation and accelerate the electrons of the beam: their velocity distribution is strongly distorted, leading to a multi-peaked structure that generates new unstable modes having phase velocities both larger and smaller than the average speed of the beam. The relationship between the wave amplitude and the characteristics of the density hole is also described, showing how the electron beam may select specific holes to generate enhanced localised Langmuir wave-packets. (10.1063/1.4989724)
  DOI : 10.1063/1.4989724
• Thermal anisotropy in [110] and [111] oriented cubic crystals for laser application (orale)
  
  • Genevrier Kevin
  • Papadopoulos Dimitrios N.
  • Camy P.
  • Doualan J. -L.
  • Moncorgé R.
  • Georges Patrick
  • Druon Frédéric
  , 2017.
• Optimization of critical-density gas jet targets for laser ion acceleration in the collisionless shockwave acceleration regime
  
  • Henares J.L.
  • Tarisien M.
  • Puyuelo P.
  • Marquès J-R
  • Nguyen-Bui T.
  • Gobet F.
  • Raymond X.
  • Versteegen M.
  • Hannachi F.
  , 2018, 1079, pp.012004. Laser ion acceleration induced by high-power laser systems is nowadays an important research subject due to the large potential range of applications it could satisfy. Most of the available high-power laser facilities deliver only a few laser pulses per hour. The new facilities under development will operate at higher repetition rates (up to 10 Hz). Conventional target technologies (solid targets) and acceleration mechanisms (Target Normal Sheath Acceleration – TNSA) used so far in laser-based ion acceleration are difficult to implement at high repetition rate. New ion acceleration mechanisms such as Collisionless Shockwave Acceleration (CSA) using high density gas jets represent therefore a promising alternative. Dense gas jet targets show several advantages such as constant refresh and negligible debris production. However, full comprehension of the fluid dynamics involved in the gas jet target production is fundamental for its optimization, and at present precise data is scarce. An ongoing study of design and optimization of supersonic gas jet nozzles for laser-based ion acceleration is presented. (10.1088/1742-6596/1079/1/012004)
  DOI : 10.1088/1742-6596/1079/1/012004
• Dynamic fracture of tantalum under extreme tensile stress
  
  • Albertazzi Bruno
  • Ozaki Norimasa
  • Zhakhovsky Vasily
  • Faenov Anatoly
  • Habara Hideaki
  • Harmand Marion
  • Hartley Nicholas
  • Ilnitsky Denis
  • Inogamov Nail
  • Inubushi Yuichi
  • Ishikawa Tetsuya
  • Katayama Tetsuo
  • Koyama Takahisa
  • Koenig Michel
  • Krygier Andrew
  • Matsuoka Takeshi
  • Matsuyama Satoshi
  • Mcbride Emma
  • Migdal Kirill Petrovich
  • Morard Guillaume
  • Ohashi Haruhiko
  • Okuchi Takuo
  • Pikuz Tatiana
  • Purevjav Narangoo
  • Sakata Osami
  • Sano Yasuhisa
  • Sato Tomoko
  • Sekine Toshimori
  • Seto Yusuke
  • Takahashi Kenjiro
  • Tanaka Kazuo
  • Tange Yoshinori
  • Togashi Tadashi
  • Tono Kensuke
  • Umeda Yuhei
  • Vinci Tommaso
  • Yabashi Makina
  • Yabuuchi Toshinori
  • Yamauchi Kazuto
  • Yumoto Hirokatsu
  • Kodama Ryosuke
  Science Advances, American Association for the Advancement of Science (AAAS), 2017, 3 (6), pp.e1602705. The understanding of fracture phenomena of a material at extremely high strain rates is a key issue for a wide variety of scientific research ranging from applied science and technological developments to fundamental science such as laser-matter interaction and geology. Despite its interest, its study relies on a fine multiscale description, in between the atomic scale and macroscopic processes, so far only achievable by large-scale atomic simulations. Direct ultrafast real-time monitoring of dynamic fracture (spallation) at the atomic lattice scale with picosecond time resolution was beyond the reach of experimental techniques. We show that the coupling between a high-power optical laser pump pulse and a femtosecond x-ray probe pulse generated by an x-ray free electron laser allows detection of the lattice dynamics in a tantalum foil at an ultrahigh strain rate of Embedded Image $\dot \varepsilon$~2 × 10$^8$ to 3.5 × 10$^8$ s$^{−1}$. A maximal density drop of 8 to 10%, associated with the onset of spallation at a spall strength of ~17 GPa, was directly measured using x-ray diffraction. The experimental results of density evolution agree well with large-scale atomistic simulations of shock wave propagation and fracture of the sample. Our experimental technique opens a new pathway to the investigation of ultrahigh strain-rate phenomena in materials at the atomic scale, including high-speed crack dynamics and stress-induced solid-solid phase transitions (10.1126/sciadv.1602705)
  DOI : 10.1126/sciadv.1602705
• Detailed characterization of laser-produced astrophysically-relevant jets formed via a poloidal magnetic nozzle
  
  • Higginson D.P.
  • Revet G.
  • Khiar B.
  • Béard Jérome
  • Blecher M.
  • Borghesi M.
  • Burdonov K.
  • Chen S.N.
  • Filippov E.
  • Khaghani D.
  • Naughton K.
  • Pépin H.
  • Pikuz S.
  • Portugall Oliver
  • Riconda C.
  • Riquier R.
  • Ryazantsev S.N.
  • Skobelev I.Yu.
  • Soloviev A. N.
  • Starodubtsev M.
  • Vinci T.
  • Willi O.
  • Ciardi A.
  • Fuchs J.
  High Energy Density Physics, Elsevier, 2017, 23, pp.48-59. (10.1016/j.hedp.2017.02.003)
  DOI : 10.1016/j.hedp.2017.02.003
• HORIZON 2020 EuPRAXIA Design Study
  
  • Walker Paul Andreas
  • Alesini David
  • Alexandrova Alexandra
  • Anania Maria Pia
  • Andreev Nikolay
  • Assmann Ralph
  • Audet Thomas
  • Bacci Alberto
  • Barna Imre
  • Beaton Andrew
  • Beck Arnaud
  • Beluze Audrey
  • Bernhard Axel
  • Bielawski Serge
  • Bisesto Fabrizio
  • Bödewadt Joern
  • Brandi Fernando
  • Bringer Olivier
  • Brinkmann Reinhard
  • Bründermann Erik
  • Bussolino Giancarlo
  • Buescher Markus
  • Chancé Antoine
  • Chen Min
  • Chiadroni Enrica
  • Cianchi Alessandro
  • Clarke James
  • Couprie Marie-Emmanuelle
  • Croia Michele
  • Cros Brigitte
  • Dale John
  • Dattoli Giuseppe
  • Delerue Nicolas
  • Delferrière Olivier
  • Delinikolas Panagiotis
  • Dias João
  • Dorda Ulrich
  • Ertel Klaus
  • Ferran Pousa Ángel
  • Ferrario Massimo
  • Filippi Francesco
  • Fils Jérôme
  • Fiorito Ralph
  • Fonseca Ricardo
  • Galimberti Marco
  • Gallo Alessandro
  • Garzella David
  • Gastinel Philippe
  • Giove Dario
  • Giribono Anna
  • Gizzi Leonida
  • Grüner Florian
  • Habib A. Fahim
  • Haefner Leon
  • Heinemann Thomas
  • Hidding Bernhard
  • Holzer Bernhard
  • Hooker Simon
  • Hosokai Tomonao
  • Jaroszynski Dino
  • Joshi Chan
  • Kaluza Malte
  • Karger Oliver
  • Karsch Stefan
  • Khazanov Efim
  • Khikhlukha Danila
  • Knetsch Alexander
  • Kocon Dariusz
  • Koester Petra
  • Kononenko Olena
  • Korn Georg
  • Kostyukov Igor
  • Labate Luca
  • Lechner Christoph
  • Leemans Wim
  • Lehrach Andreas
  • Li Fei Yu
  • Li Xiangkun
  • Lifschitz Agustin
  • Litvinenko Vladimir
  • Lu Wei
  • Maier Andreas
  • Malka Victor
  • Manahan Grace
  • Mangles Stuart
  • Marchetti Barbara
  • Marocchino Alberto
  • Martinez de La Ossa Alberto
  • Martins Joana
  • Masaki Kando
  • Massimo Francesco
  • Mathieu Francois
  • Maynard Gilles
  • Mehrling Timon
  • Molodozhentsev Alexander
  • Mosnier Alban
  • Mostacci Andrea
  • Müller Anke-Susanne
  • Najmudin Zulfikar
  • Nghiem Phu Anh Phi
  • Nguyen Federico
  • Niknejadi Pardis
  • Osterhoff Jens
  • Papadopoulos Dimitrios
  • Patrizi Barbara
  • Pattathil Rajeev
  • Petrillo Vittoria
  • Pocsai Mihály
  • Poder Kristjan
  • Pompili Riccardo
  • Pribyl Lukas
  • Pugacheva Daria
  • Romeo Stefano
  • Rossi Andrea
  • Sahai Aakash
  • Sano Yoshinobu
  • Scherkl Paul
  • Schramm Ulrich
  • Schroeder Carl
  • Schwindling Jerome
  • Scifo Jessica
  • Serafini Luca
  • Sheng Zhengming
  • Silva Luis
  • Simon Claire
  • Sinha Ujjwal
  • Specka Arnd
  • Streeter Matthew
  • Svystun Elena
  • Symes Daniel
  • Szwaj Christophe
  • Tauscher Gabriele
  • Thomas Alec
  • Thompson Neil
  • Toci Guido
  • Tomassini Paolo
  • Vaccarezza Cristina
  • Vannini Matteo
  • Vieira Jorge
  • Villa Fabio
  • Wahlstrom Claes-Goran
  • Walczak Roman
  • Weikum Maria
  • Welsch Carsten
  • Wolfenden Joseph
  • Xia Guoxing
  • Yabashi Makina
  • Yu Lule
  • Zhu Jun
  • Zigler Arie
  , 2017, 874, pp.TUOBB3. The Horizon 2020 Project EuPRAXIA ('European Plasma Research Accelerator with eXcellence In Applications') aims at producing a design report of a highly compact and cost-effective European facility with multi-GeV electron beams using plasma as the acceleration medium. The accelerator facility will be based on a laser and/or a beam driven plasma acceleration approach and will be used for photon science, high-energy physics (HEP) detector tests, and other applications such as compact X-ray sources for medical imaging or material processing. EuPRAXIA started in November 2015 and will deliver the design report in October 2019. EuPRAXIA aims to be included on the ESFRI roadmap in 2020. (10.18429/JACoW-IPAC2017-TUOBB3)
  DOI : 10.18429/JACoW-IPAC2017-TUOBB3
• Design update and recent results of the Apollon 10 PW facility (orale)
  
  • Le Garrec Bruno
  • Papadopoulos Dimitrios N.
  • Leblanc Catherine
  • Zou J-P
  • Freneaux Antoine
  • Martin Luc
  • Lebas N.
  • Beluze Audrey
  • Mathieu François
  • Audebert Patrick
  • Chériaux G.
  • Georges Patrick
  • Druon Frédéric
  , 2017. The Apollon 10-PW facility, currently under construction in France, is delivering 30 J before compression at a repetition rate of 1 shot per minute and we are currently increasing to get 100J. (10.1364/CLEO_SI.2017.SF1K.3)
  DOI : 10.1364/CLEO_SI.2017.SF1K.3
• Design update and recent results of the Apollon 10 PW facility (orale)
  
  • Le Garrec Bruno
  • Papadopoulos Dimitrios N.
  • Le Blanc Charles
  • P. Zou J.
  • Chériaux G.
  • Georges Patrick
  • Druon Frédéric
  • Martin Luc
  • Freneaux L.
  • Beluze Audrey
  • Lebas N.
  • Mathieu F.
  • Audebert P.
  , 2017, 10238, pp.102380Q. In this paper we are giving a summary of the Apollon 10 PW facility laser design together with updated laser performance. The Apollon facility is currently under construction in France. The APOLLON laser system is a laser designed for delivering pulses as short as 15 fs (10⁻¹⁵ s) with an energy exceeding 150 Joules on target. The peak power delivered by this laser system will be 10 Petawatts (10¹⁶W). The Apollon laser system will be delivering 4 beams: one 10 PW beam (F1 beam 400 mm diameter), one 1 PW beam (F2 beam 140 mm diameter) and two additional probe beams (F3 and F4) at a repetition rate of 1 shot per minute. The laser system is based on Ti-sapphire amplifiers pumped by frequency doubled solid-state lasers. The repetition rate of the high energy part will be 1 shot per minute. The main beam at the output of the last amplifier will be split and dispatched to two experimental areas. The main laser beam is delivering 30 J before compression at a repetition rate of 1 shot per minute and we are currently increasing to get 100J. Design update and recent results of the Apollon 10 PW facility (PDF Download Available). Available from: https://www.researchgate.net/publication/316893870_Design_update_and_recent_results_of_the_Apollon_10_PW_facility [accessed Sep 12, 2017]. (10.1117/12.2265182)
  DOI : 10.1117/12.2265182
• Collimated propagation of fast electron beams accelerated by high-contrast laser pulses in highly-resistive shocked-carbon
  
  • Vaisseau X.
  • Morace A.
  • Touati M.
  • Nakatsutsumi M.
  • Baton S. D.
  • Hulin S.
  • Nicolai Ph.
  • Nuter R.
  • Batani D.
  • Beg F. N
  • Breil J.
  • Fedosejevs R.
  • Feugeas J.-L.
  • Forestier-Colleoni P.
  • Fourment C.
  • Fujioka S.
  • Giuffrida L.
  • Kerr S.
  • Mclean H. S
  • Sawada H.
  • Tikhonchuk V.  T
  • Santos J.  J.
  Physical Review Letters, American Physical Society, 2017, 118 (20), pp.205001. Collimated transport of ultrahigh intensity electron current was observed in cold and in laser-shocked vitreous carbon, in agreement with simulation predictions. The fast electron beams were created by coupling high-intensity and high-contrast laser pulses onto copper-coated cones drilled into the carbon samples. The guiding mechanism—observed only for times before the shock breakout at the inner cone tip—is due to self-generated resistive magnetic fields of ∼0.5–1 kT arising from the intense currents of fast electrons in vitreous carbon, by virtue of its specific high resistivity over the range of explored background temperatures. The spatial distribution of the electron beams, injected through the samples at different stages of compression, was characterized by side-on imaging of hard x-ray fluorescence. (10.1103/PhysRevLett.118.205001)
  DOI : 10.1103/PhysRevLett.118.205001
• Using X-ray spectroscopy of relativistic laser plasma interaction to reveal parametric decay instabilities: a modeling tool for astrophysics
  
  • Oks E.
  • Dalimier E.
  • Faenov A.Ya.
  • Angelo P.
  • Pikuz S.A.
  • Tubman E.
  • Butler N.M.H.
  • Dance R.J.
  • Pikuz T.A.
  • Skobelev I.Yu.
  • Alkhimova M.A.
  • Booth N.
  • Green J.
  • Gregory C.
  • Andreev A.
  • Zhidkov A.
  • Kodama Ryosuke
  • Mckenna P.
  • Woolsey N.
  Optics Express, Optical Society of America - OSA Publishing, 2017, 25 (3), pp.1958. (10.1364/OE.25.001958)
  DOI : 10.1364/OE.25.001958
• Relativistic surface plasmon enhanced harmonic generation from gratings
  
  • Fedeli L.
  • Sgattoni A.
  • Cantono G.
  • Macchi A.
  Applied Physics Letters, American Institute of Physics, 2017, 110 (5), pp.051103. The role of relativistic surface plasmons (SPs) in high order harmonic emission from laser-irradiated grating targets has been investigated by means of particle-in-cell simulations. SP excitation drives a strong enhancement of the intensity of harmonics, particularly in the direction close to the surface tangent. The SP-driven enhancement overlaps with the angular separation of harmonics generated by the grating, which is beneficial for applications requiring monochromatic extreme ultraviolet (XUV) pulses. (10.1063/1.4975365)
  DOI : 10.1063/1.4975365
• Kinetic and finite ion mass effects on the transition to relativistic self-induced transparency in laser-driven ion acceleration
  
  • Siminos E.
  • Grech M.
  • Wettervik B. Svedung
  • Fülöp T.
  New Journal of Physics, Institute of Physics: Open Access Journals, 2017, 19. We study kinetic effects responsible for the transition to relativistic self-induced transparency in the interaction of a circularly-polarized laser-pulse with an overdense plasma and their relation to hole-boring (HB) and ion acceleration. It is demonstrated using particle-in-cell simulations and an analysis of separatrices in single-electron phase-space, that ion motion can suppress fast electron escape to the vacuum, which would otherwise lead to transition to the relativistic transparency regime. A simple analytical estimate shows that for large laser pulse amplitude a 0 the time scale over which ion motion becomes important is much shorter than usually anticipated. As a result of enhanced ion mobility, the threshold density above which HB occurs decreases with the charge-to-mass ratio. Moreover, the transition threshold is seen to depend on the laser temporal profile, due to the effect that the latter has on electron heating. Finally, we report a new regime in which a transition from relativistic transparency to HB occurs dynamically during the course of the interaction. It is shown that, for a fixed laser intensity, this dynamic transition regime allows optimal ion acceleration in terms of both energy and energy spread. (10.1088/1367-2630/aa8e66)
  DOI : 10.1088/1367-2630/aa8e66