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Enhanced ion acceleration using the high-energy petawatt PETAL laser

Matter and Radiation at Extremes 2021年第5期6卷 62-79页

作者： d.Raffestin L.Lecherbourg I.Lantúejoul B.Vauzour P.E.Masson-Laborde X.davoine N.Blanchot J.L.dubois X.Vaisseau E.d’Humières L.Gremillet A.duval Ch.Reverdin B.Rosse G.Boutoux J.E.ducret Ch.Rousseaux V.Tikhonchuk d.batani CEA DAMCESTAF-33116 Le BarpFrance Centre Laser Intenses et Applications Universit´e de Bordeaux-CNRS-CEAUMR 510733405 TalenceFrance CEA DAMDIFF-91297 ArpajonFrance Universit´e Paris-Saclay CEALMCE91680 Bruy`eres-le-ChˆatelFrance CEA DRFIRFUGANILF-14000 CaenFrance ELI-Beamlines Research Centre 25241 DolníBrezanyCzech Republic

The high-energy petawatt PETAL laser system was commissioned at CEA’s Laser M´egajoule facility during the 2017–2018 *** paper reports in detail on the first experimental results obtained at PETAL on energetic particle and photon generation from solid foil targets,with special emphasis on proton *** a moderately relativistic(d significantly above those expected from preliminary numerical simulations using idealized interaction *** hydrodynamic and kinetic simulations,taking into account the actual laser parameters,show the importance of the energetic electron production in the extended low-density preplasma created by the laser *** hot-electron generation occurs through two main pathways:(i)stimulated backscattering of the incoming laser light,triggering stochastic electron heating in the resulting counterpropagating laser beams;(ii)laser filamentation,leading to local intensifications of the laser field and plasma channeling,both of which tend to boost the electron ***,owing to the large(∼100μm)waist and picosecond duration of the PETAL beam,the hot electrons can sustain a high electrostatic field at the target rear side for an extended period,thus enabling efficient target normal sheath acceleration of the rear-side *** particle distributions predicted by our numerical simulations are consistent with the measurements.

关键词： acceleration high energy

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Multibeam laser-plasma interaction at the Gekko XII laser facility in conditions relevant for direct-drive inertial confinement fusion

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High Power Laser Science and Engineering 2023年第2期11卷 70-80页

作者： G.Cristoforetti P.Koester S.Atzeni d.batani S.Fujioka Y.Hironaka S.Hüller T.Idesaka K.Katagiri K.Kawasaki R.Kodama d.Mancelli Ph.Nicolai N.Ozaki A.Schiavi K.Shigemori R.Takizawa T.Tamagawa d.Tanaka A.Tentori Y.Umeda A.Yogo L.A.Gizzi Intense Laser Irradiation Laboratory INO-CNRPisaItaly dipartimento SBAI Universitàdi Roma‘La Sapienza’RomaItaly UniversitéBordeaux CNRSCEACELIATalenceFrance Institute of Laser Engineering Osaka UniversityOsakaJapan Centre de Physique Théorique CPHT CNRSIP ParisEcole PolytechniquePalaiseauFrance Graduate School of Engineering Osaka UniversityOsakaJapan Institute of Plasma Physics and Lasers Hellenic Mediterranean University Research CentreRethymnonGreece Institute for Integrated Radiation and Nuclear Science Kyoto UniversitySennanOsakaJapan

Laser–plasma interaction and hot electrons have been characterized in detail in laser irradiation conditions relevant for direct-drive inertial confinement *** experiment was carried out at the Gekko XII laser facility in multibeam planar target geometry at an intensity of approximately 3×10^(15)W/cm^(2).Experimental data suggest that high-energy electrons,with temperatures of 20–50 keV and conversion efficiencies ofηduced by the damping of electron plasma waves driven by two-plasmon decay(TPd).Stimulated Raman scattering(SRS)is observed in a near-threshold growth regime,producing a reflectivity of approximately 0.01%,and is well described by an analytical model accounting for the convective growth in independent *** experiment reveals that both TPd and SRS are collectively driven by multiple beams,resulting in a more vigorous growth than that driven by single-beam laser intensity.

关键词： inertial confinement fusion laser plasma interaction parametric instabilities

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Observation and modelling of stimulated Raman scattering driven by an optically smoothed laser beam in experimental conditions relevant for shock ignition

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High Power Laser Science and Engineering 2021年第4期9卷 160-178页

作者： G.Cristoforetti S.Hüller P.Koester L.Antonelli S.Atzeni F.Baffigi d.batani C.Baird N.Booth M.Galimberti K.Glize A.Héron M.Khan P.Loiseau d.Mancelli M.Notley P.Oliveira O.Renner M.Smid A.Schiavi G.Tran N.C.Woolsey L.A.Gizzi Intense Laser Irradiation Laboratory INO-CNRINO-CNR56124 PisaItaly Centre de Physique Théorique CPHT CNRSIP ParisEcole Polytechnique91128 PalaiseauFrance York Plasma Institute Department of PhysicsUniversity of YorkYork YO105DDUK dipartimento SBAI Universitàdi Roma'La Sapienza'00161 RomaItaly Universitéde Bordeaux CNRSCEACELIA33405 TalenceFrance STFC Rutherford Appleton Lab Central Laser FacilityDidcot SN21SZUK Key Laboratory for Laser Plasmas(MOE) Shanghai Jiao Tong UniversityShanghai 200240China CEA DAMDIF91297 ArpajonFrance UniversitéParis-Saclay CEALMCE91680 Bruyeres-le-ChatelFrance Institute of Physics ELI BeamlinesInstitute of Plasma PhysicsCzech Academy of Sciences18221 PragueCzech Republic Helmholtz-Zentrum dresden-Rossendorf 01328 DresdenGermany

We report results and modelling of an experiment performed at the Target Area West Vulcan laser facility,aimed at investigating laser±plasma interaction in conditions that are of interest for the shock ignition scheme in inertial confinement fusion(ICF),that is,laser intensity higher than 10^(16) W/cm^(2) impinging on a hot(T>1 keV),inhomogeneous and long scalelength pre-formed *** show a significant stimulated Raman scattering(SRS)backscattering(;%-20%of laser energy)driven at low plasma densities and no signatures of two-plasmon decay(TPd)/SRS driven at the quarter critical density *** are satisfactorily reproduced by an analytical model accounting for the convective SRS growth in independent laser speckles,in conditions where the reflectivity is dominated by the contribution from the most intense speckles,where SRS becomes *** and kinetic simulations well reproduce the onset of SRS at low plasma densities in a regime strongly affected by non-linear Landau damping and by filamentation of the most intense laser *** absence of TPd/SRS at higher densities is explained by pump depletion and plasma smoothing driven by *** prevalence of laser coupling in the low-density profile justifies the low temperature measured for hot electrons(7-12 keV),which is well reproduced by numerical simulations.

关键词： plasma simulations shock ignition stimulated Raman scattering inertial confinement fusion laser-plasma interaction

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Time evolution of stimulated Raman scattering and two-plasmon decay at laser intensities relevant for shock ignition in a hot plasma

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High Power Laser Science and Engineering 2019年第3期7卷 142-155页

作者： G.Cristoforetti L.Antonelli d.Mancelli S.Atzeni F.Baffigi F.Barbato d.batani G.Boutoux F.d'Amato J.dostal R.dudzak E.Filippov Y.J.Gu L.Juha O.Klimo M.Krus S.Malko A.S.Martynenko Ph.Nicolai V.Ospina S.Pikuz O.Renner J.Santos V.T.Tikhonchuk J.Trela S.Viciani L.Volpe S.Weber L.A.Gizzi National Institute of Optics CNRPisa and FlorenceItaly York Plasma Physics Institute University of YorkHe slingtonYorkUK Universite de Bordeaux CNRSCEACELIATalenceFrance donostia International Physics Center(diPC) Donostia/San SebastianBasque CountrySpain dipartimento SBAI Universita di Roma La SapienzaRomaItaly National Research Nuclear University MEPhl MoscowRussia CEA DAMDIFArpajonFrance department of Radiation and Chemical Physics Institute of Physics of the CASPragueCzech Republic Laser Plasma department Institute of Plasma Physics of the CASPragueCzech Republic Joint Institute for High Temperature RAS MoscowRussia ELI-Beamlines Institute of Physics of the CASPragueCzech Republic FNSPE Czech Technical University in PraguePragueCzech Republic Universidad de Salamanca Ctr Laseres PulsadosSalamancaSpain Centro de Laseres Pulsados(CLPU) VillamayorSalamancaSpain

Laser–plasma interaction(LPI)at intensities 1015–1016 W·cm^-2 is dominated by parametric instabilities which can be responsible for a significant amount of non-collisional absorption and generate large fluxes of high-energy nonthermal *** a regime is of paramount importance for inertial confinement fusion(ICF)and in particular for the shock ignition *** this paper we report on an experiment carried out at the Prague Asterix Laser System(PALS)facility to investigate the extent and time history of stimulated Raman scattering(SRS)and two-plasmon decay(TPd)instabilities,driven by the interaction of an infrared laser pulse at an intensity^1.2×1016 W·cm^-2 with a^100μm scalelength plasma produced from irradiation of a flat plastic *** laser pulse duration(300 ps)and the high value of plasma temperature(~4 ke V)expected from hydrodynamic simulations make these results interesting for a deeper understanding of LPI in shock ignition *** results show that absolute TPd/SRS,driven at a quarter of the critical density,and convective SRS,driven at lower plasma densities,are well separated in time,with absolute instabilities driven at early times of interaction and convective backward SRS emerging at the laser peak and persisting all over the tail of the ***-scattering SRS,driven at low plasma densities,is also clearly *** results are compared to fully kinetic large-scale,two-dimensional ***-in-cell results,beyond reproducing the framework delineated by the experimental measurements,reveal the importance of filamentation instability in ruling the onset of SRS and stimulated Brillouin scattering instabilities and confirm the crucial role of collisionless absorption in the LPI energy balance.

关键词： plasma simulations shock ignition stimulated Raman scattering two-plasmon decay

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Multibeam laser±plasma interaction at the Gekko Ⅻ laser facility in conditions relevant for direct-drive inertial confinement fusion

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High Power Laser Science and Engineering 2023年第2期 75-85页

作者： G.Cristoforetti P.Koester S.Atzeni d.batani S.Fujioka Y.Hironaka S.Hüller T.Idesaka K.Katagiri K.Kawasaki R.Kodama d.Mancelli Ph.Nicolai N.Ozaki A.Schiavi K.Shigemori R.Takizawa T.Tamagawa d.Tanaka A.Tentori Y.Umeda A.Yogo L.A.Gizzi Intense Laser Irradiation Laboratory 2. dipartimento SBAI Università di Roma ‘La Sapienza' 3. Université BordeauxCNRS CEA CELIA Institute of Laser Engineering Osaka University Centre de Physique Théorique CPHT CNRS IP ParisEcole Polytechnique Graduate School of Engineering Osaka University Institute of Plasma Physics and Lasers Hellenic Mediterranean University Research Centre Institute for Integrated Radiation and Nuclear Science Kyoto University

Laser±plasma interaction and hot electrons have been characterized in detail in laser irradiation conditions relevant for direct-drive inertial confinement fusion. The experiment was carried out at the Gekko XII laser facility in multibeam planar target geometry at an intensity of approximately 3 × 1015W/cm2. Experimental data suggest that high-energy electrons, with temperatures of 20-50 ke V and conversion efficiencies of η duced by the damping of electron plasma waves driven by two-plasmon decay(TPd). Stimulated Raman scattering(SRS) is observed in a near-threshold growth regime, producing a reflectivity of approximately 0.01%, and is well described by an analytical model accounting for the convective growth in independent speckles. The experiment reveals that both TPd and SRS are collectively driven by multiple beams, resulting in a more vigorous growth than that driven by single-beam laser intensity.

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Innovative Education and Training in high power laser plasmas(PowerLaPs) for plasma physics, high power laser-matter interactions and high energy density physics-theory and experiments

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High Power Laser Science and Engineering 2019年第2期7卷 22-26页

作者： John Pasley Georgia Andrianaki Andreas Baroutsos dimitri batani Emmanouil P.Benis Marco Borghesi Eugene Clark donna Cook Emmanuel d'Humieres Vasilios dimitriou Brendan dromey Michael Ehret Ioannis Fitilis Anastasios Grigoriadis Satya Kar Evaggelos Kaselouris Ondrej Klimo Michel Koenig Kyriaki Kosma George Koundourakis Milan Kucharik Aveen Lavery Jiri Limpouch Yannis Orphanos Nektarios A.Papadogiannis Stelios Petrakis dave Riley Maria Serena Rivetta Laura Tejada Pascual Joao Jorge Santos Alexandros Skoulakis Ioannis Tazes Vladimir Tikhonchuk Jocelain Trela Calliope Tsitou Luca Volpe Steven White Mark Yeung Michael Tatarakis York Plasma Institute University of York Technological Educational Institute of Crete School of Applied SciencesCentre for Plasma Physics and Lasers-CPPL Universitéde Bordeaux CNRSCEACELIA(Centre Lasers Intenses et Applications) department of Physics University of Ioannina Centre for Plasma Physics School of Mathematics and PhysicsQueen’s University Belfast Faculty of Nuclear Sciences and Physical Engineering Czech Technical University in Prague LULI-CNRS Ecole Polytechnique CEA:UniversitéParis-Saclay UPMC Univ Paris 06:Sorbonne Universités CLPU Laser-Plasma Chair University of Salamanca Centro de Láseres Pulsados(CLPU) Edificio M5.Parque Cientfico.C/Adaja

The Erasmus Plus programme’Innovative Education and Training in high power laser plasmas’,otherwise known as PowerLaPs,is *** PowerLaPs programme employs an innovative paradigm in that it is a multi-centre programme where teaching takes place in five separate institutes with a range of different aims and styles of *** ’in class’ time is limited to four weeks a year,and the programme spans two *** aims to train students from across Europe in theoretical,applied and laboratory skills relevant to the pursuit of research in laserplasma interaction physics and inertial confinement fusion(ICF).Lectures are intermingled with laboratory sessions and continuous assessment *** programme,which is led by workers from the Technological Educational Institute(TEI)of Crete,and supported by co-workers from the Queen’s University Belfast,the University of Bordeaux,the Czech Technical-University in Prague,Ecole Polytechnique,the University of Ioannina,the University of Salamanca and the University of York,has just completed its first *** far three Learning Teaching Training(LTT)activities have been held,at the Queen’s University Belfast,the University of Bordeaux and the Centre for Plasma Physics and Lasers(CPPL)of TEI *** last of these was a two-week long Intensive Programme(IP),while the activities at the other two universities were each five days in *** far work has concentrated upon training in both theoretical and experimental work in plasma physics,high power laser-matter interactions and high energy density *** nature of the programme will be described in detail and some metrics relating to the activities carried out to date will be presented.

关键词： higher education inertial confinement fusion laser-plasma interactions post-graduate education

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