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Laboratory radiative accretion shocks on GEKKO XⅡlaser facility for POLAR project

High Power Laser Science and Engineering 2018年第2期6卷 181-188页

作者： L.Van Box Som E.Falize M.Koenig Y.Sakawa B.Albertazzi E Barroso J.-***-Bidaud C.Busschaert a.ciardi Y.Hara N.Katsuki R.Kumar E Lefevre C.Michaut Th.Michel T.Miura T.Morita M.Mouchet G.Rigon T.Sano S.Shiiba H.Shimogawara S.Tomiya CEA-DAM-DIF F-91297 ArpajonFrance LERMA Sorbonne UniversiteObservatoire de ParisUniversite PSLCNRSF-75005 ParisFrance CEA Saclay DSM/Irfu/Service d'AstrophysiqueF-91191 Gif-sur-YvetteFrance LULI-CNRS Ecole PolytechniqueCEA:Universite Paris-Saclay UPMC Univ Paris 06:Sorbonne Universite-F-91128 Palaiseau Cedex France Graduate School of Engineering Osaka UniversitySuitaOsaka 565-0871Japan Institute of Laser Engineering Osaka UniversitySuitaOsaka 565-0871Japan Faculty of Engineering Sciences Kyushu University6-1 Kasuga-KoenKasugaFukuoka 816-8580Japan Aoyama Gakuin University Japan GEPI Observatoire de ParisPSL Research UniversityCNRSUniversite Paris DiderotSorbonne Paris CiteF-75014 ParisFrance LUTH Observatoire de ParisPSL Research UniversityCNRSUniversite Paris DiderotSorbonne Paris CiteF-92195 MeudonFrance

A new target design is presented to model high-energy radiative accretion shocks in polars. In this paper, we present the experimental results obtained on the GEKKO XII laser facility for the POLAR project. The experimental results are compared with 2 D FCI2 simulations to characterize the dynamics and the structure of plasma flow before and after the collision. The good agreement between simulations and experimental data confirms the formation of a reverse shock where cooling losses start modifying the post-shock region. With the multi-material structure of the target,a hydrodynamic collimation is exhibited and a radiative structure coupled with the reverse shock is highlighted in both experimental data and simulations. The flexibility of the laser energy produced on GEKKO XII allowed us to produce high-velocity flows and study new and interesting radiation hydrodynamic regimes between those obtained on the LULI2000 and Orion laser facilities.

关键词： accretion processes high power laser hydrodynamics laboratory astrophysics

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Detailed characterization of a laboratory magnetized supercritical collisionless shock and of the associated proton energization

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Matter and Radiation at Extremes 2022年第1期7卷 15-28页

作者： W.Yao A.Fazzini S.N.Chen K.Burdonov P.Antici J.B´eard S.Bolaños a.ciardi R.Diab E.D.Filippov S.Kisyov V.Lelasseux M.Miceli Q.Moreno V.Nastasa S.Orlando S.Pikuz D.C.Popescu G.Revet X.Ribeyre E.d’Humi`eres J.Fuchs LULI–CNRS CEAUPMC Univ Paris 06:Sorbonne Universit´eEcole PolytechniqueInstitut Polytechnique de ParisF-91128 Palaiseau CedexFrance Sorbonne Universit´e Observatoire de ParisUniversit´e PSLCNRSLERMAF-75005 ParisFrance ELI-NP “Horia Hulubei”National Institute for Physics and Nuclear Engineering30 Reactorului StreetRO-077125 Bucharest-MagureleRomania IAP Russian Academy of Sciences603155 Nizhny NovgorodRussia INRS-EMT 1650 Blvd.Lionel-BouletVarennesQuebec J3X 1S2Canada LNCMI UPR 3228CNRS-UGA-UPS-INSAF-31400 ToulouseFrance JIHT Russian Academy of Sciences125412 MoscowRussia Universit`a degli Studi di Palermo Dipartimento di Fisica e Chimica E.Segr`ePiazza del Parlamento 190134 PalermoItaly INAF–Osservatorio Astronomico di Palermo PalermoItaly University of Bordeaux Centre Lasers Intenses et ApplicationsCNRSCEAUMR 5107F-33405 TalenceFrance ELI-Beamlines Institute of PhysicsCzech Academy of Sciences5 Kvetna 83525241 Dolni BrezanyCzech Republic NRNU MEPhI 115409 MoscowRussia

Collisionless shocks are ubiquitous in the Universe and are held responsible for the production of nonthermal particles and high-energy *** the absence of particle collisions in the system,theory shows that the interaction of an expanding plasma with a pre-existing electromagnetic structure(as in our case)is able to induce energy dissipation and allow shock *** formation can alternatively take place when two plasmas interact,through microscopic instabilities inducing electromagnetic fields that are able in turn to mediate energy dissipation and shock *** our platform in which we couple a rapidly expanding plasma induced by high-power lasers(JLF/Titan at LLNL and LULI2000)with high-strength magnetic fields,we have investigated the generation of a magnetized collisionless shock and the associated particle *** have characterized the shock as being collisionless and *** report here on measurements of the plasma density and temperature,the electromagnetic field structures,and the particle energization in the experiments,under various conditions of ambient plasma and magnetic *** have also modeled the formation of the shocks using macroscopic hydrodynamic simulations and the associated particle acceleration using kinetic particle-in-cell *** a companion paper to Yao et al.[***.17,1177–1182(2021)],here we show additional results of the experiments and simulations,providing more information to allow their reproduction and to demonstrate the robustness of our interpretation of the proton energization mechanism as being shock surfing acceleration.

关键词： field collision shock

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X-ray spectroscopy evidence for plasma shell formation in experiments modeling accretion columns in young stars

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Matter and Radiation at Extremes 2019年第6期4卷 22-29页

作者： E.D.Filippov I.Yu.Skobelev G.Revet S.N.Chen B.Khiar a.ciardi D.Khaghani D.P.Higginson S.A.Pikuz J.Fuchs Joint Institute for High Temperatures RAS125412 MoscowRussia National Research Nuclear University “MEPHI”115409 MoscowRussia LULI-CNRS ´Ecole PolytechniqueCEA:Universit´e Paris-SaclayUPMC Univ Paris 06:Sorbonne Universit´eF-91128 Palaiseau CedexFrance ELI-NP “Horia Hulubei”National Institute for Physics and Nuclear Engineering30 Reactorului StreetRO-077125 Bucharest-MagureleRomania Sorbonne Universit´e Observatoire de ParisUniversit´e PSLCNRSLERMAF-75005 ParisFrance Flash Center for Computational Science University of Chicago5640 S.Ellis AvenueChicagoIllinois 60637USA University of Bordeaux CEACNRSCentre Lasers Intenses et ApplicationsUMR 510733405 Talence CedexFrance Lawrence Livermore National Laboratory LivermoreCalifornia 94551USA

Recent achievements in laboratory astrophysics experiments with high-power lasers have allowed progress in our understanding of the early stages of star *** particular,we have recently demonstrated the possibility of simulating in the laboratory the process of the accretion of matter on young stars[*** et al.,***.3,e1700982(2017)].The present paper focuses on x-ray spectroscopy methods that allow us to investigate the complex plasma hydrodynamics involved in such *** demonstrate that we can infer the formation of a plasma shell,surrounding the accretion column at the location of impact with the stellar surface,and thus resolve the present discrepancies between mass accretion rates derived from x-ray and optical-radiation astronomical observations originating from the same *** our experiments,the accretion column ismodeled by having a collimated narrow(1 mm diameter)plasma stream first propagate along the lines of a large-scale external magnetic field and then impact onto an obstacle,mimicking the high-density region of the stellar chromosphere.A combined approach using steady-state and quasi-stationarymodels was successfully applied tomeasure the parameters of the plasma all along its propagation,at the impact site,and in the structure surrounding the impact *** formation of a hot plasma shell,surrounding the denser and colder core,formed by the incoming stream of matter is observed near the obstacle using x-ray spatially resolved spectroscopy.

关键词： accretion stars stellar

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What Is Happiness

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山东师范大学外国语学院学报（基础英语教育） 2007年第6期9卷 103-104页

作者： John ciardi

The right to pursue happiness is issued to Americans with their birth certificates, but no one seems quite sure which way it ran. It may be we are issued a hunting license but offered no game. Jonathan Swift1 seemed to think so when he attacked the idea of happiness as 'the possession of being well-deceived,' the felicity of being 'a fool among knaves'. For Swift saw society as Vanity Fair2, the land of false goals.

关键词：外国文学美文赏析散文当代幸福观

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Characterization of the stability and dynamics of a laser-produced plasma expanding across a strong magnetic field

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Matter and Radiation at Extremes 2022年第2期7卷 53-61页

作者： Weipeng Yao Julien Capitaine Benjamin Khiar Tommaso Vinci Konstantin Burdonov Jérôme Béard Julien Fuchs Andrea.ciardi LULI–CNRS CEASorbonne UniversitéEcole PolytechniqueInstitut Polytechnique de ParisF-91128 Palaiseau cedexFrance Sorbonne Université Observatoire de ParisUniversitéPSLCNRSLERMAF-75005 ParisFrance Office National d’Etudes et de Recherches Aérospatiales(ONERA) F-91123 PalaiseauFrance IAP Russian Academy of Sciences603950 Nizhny NovgorodRussia LNCMI UPR 3228CNRS-UGA-UPS-INSAF-31400 ToulouseFrance

Magnetized laser-produced plasmas are central to many studies in laboratory astrophysics,in inertial confinement fusion,and in industrial ***,we present the results of large-scale three-dimensional magnetohydrodynamic simulations of the dynamics of a laser-produced plasma expanding into a transverse magnetic field with a strength of tens of *** simulations show the plasma being confined by the strong magnetic field into a slender slab structured by the magnetized Rayleigh–Taylor instability that develops at the plasma–vacuum *** find that when the initial velocity of the plume is perturbed,the slab can develop kink-like motions that disrupt its propagation.

关键词： expanding dynamics magnetic

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SUMMER SONG

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考试与评价（英语八年级专刊） 2010年第7期 1-1页

作者： John ciardi

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Summer Song

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考试与评价（英语七年级专刊） 2011年第8期 1-1页

作者： John ciardi 莫悠可不详福建厦门

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Optimizing laser coupling,matter heating,and particle acceleration from solids using multiplexed ultraintense lasers

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Matter and Radiation at Extremes 2024年第4期9卷 16-28页

作者： Weipeng Yao Motoaki Nakatsutsumi Sébastien Buffechoux Patrizio Antici Marco Borghesi Andrea.ciardi Sophia N.Chen Emmanuel d’Humières Laurent Gremillet Robert Heathcote Vojtech Horny Paul McKenna Mark N.Quinn Lorenzo Romagnani Ryan Royle Gianluca Sarri Yasuhiko Sentoku Hans-Peter Schlenvoigt Toma Toncian Olivier Tresca Laura Vassura Oswald Willi Julien Fuchs LULI-CNRS CEASorbonne UniversitéEcole PolytechniqueInstitut Polytechnique de ParisF-91128 Palaiseau CedexFrance Sorbonne Université Observatoire de ParisUniversité PSLCNRSLERMAF-75005 ParisFrance INRS-EMT 1650 BoulLionel-BouletVarennesQuebec J3X 1S2Canada Center for Plasma Physics School of Mathematics and PhysicsQueen’s University BelfastBelfast BT71NNUnited Kingdom “Horia Hulubei”National Institute for Physics and Nuclear Engineering 30 Reactorului StreetRO-077125 Bucharest-MagureleRomania University of Bordeaux Centre Lasers Intenses et ApplicationsCNRSCEAUMR 5107F-33405 TalenceFrance CEA DAMDIFF-91297 ArpajonFrance Université Paris-Saclay CEALMCE91680 Bruyères-le-ChatelFrance Central Laser Facility STFC Rutherford Appleton LaboratoryDidcotUnited Kingdom SUPA Department of PhysicsUniversity of StrathclydeGlasgow G40NGUnited Kingdom Department of Physics University of NevadaRenoNevada 89557USA Institute of Laser Engineering Osaka University2-6 YamadaokaSuitaOsaka 565-0871Japan Institut fur Laser und Plasmaphysik Heinrich Heine Universitat DusseldorfDusseldorfGermany

Realizing the full potential of ultrahigh-intensity lasers for particle and radiation generation will require multi-beam arrangements due to technology ***,we investigate how to optimize their coupling with solid ***,we show that overlapping two intense lasers in a mirror-like configuration onto a solid with a large preplasma can greatly improve the generation of hot electrons at the target front and ion acceleration at the target *** underlying mechanisms are analyzed through multidimensional particle-in-cell simulations,revealing that the self-induced magnetic fields driven by the two laser beams at the target front are susceptible to reconnection,which is one possible mechanism to boost electron *** addition,the resistive magnetic field generated during the transport of the hot electrons in the target bulk tends to improve their *** simulations also indicate that such effects can be further enhanced by overlapping more than two laser beams.

关键词： laser acceleration particle

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幸福的定义

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海外英语 2004年第7期 21-页

作者： John ciardi 张继华　大庆石油学院外语系

　　为拥有而拥有和为与邻里攀比而拥有或许就是梭罗的低层次概念.主动约束自己,深化自己对自然界中永恒的事物的认识或许就是其高层次概念.……

关键词：主动约束概念自然界

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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: experimental diagnostics and simulations

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High Power Laser Science and Engineering 2020年第1期8卷 30-36页

作者： John Pasley Georgia Andrianaki Andreas Baroutsos Dimitri Batani Emmanouil PBenis Andrea.ciardi Donna Cook Vasilios Dimitriou Brendan Dromey Ioannis Fitilis Giancarlo Gatti Anastasios Grigoriadis Marine Huault Jose Antonio Pérez Hernández Evaggelos Kaselouris Ondrej Klimo Michel Koenig George Koundourakis Milan Kucharik Jiri Limpouch Richard Liska Carlos Salgado Lopez Sophia Malko Susana Olmos-Miguelanez Yannis Orphanos Valeria Ospina Nektarios APapadogiannis Stelios Petrakis Jan Psikal Maria Serena Rivetta Maria-ose Rodriguez-Conde Joao Jorge Santos Milan Sinor Alexandros Skoulakis Ioannis Tazes Laura Tejada Pascual Calliope Tsitou Pavel Vachal Luca Volpe Jiri Vyskocil Steven White Mark Yeung Ghassan Zerouli Michael Tatarakis York Plasma Institute University of YorkHeslingtonYork YO105DQUK Hellenic Mediterranean University Institute of Plasma Physics and Lasers-IPPL74100 Rethymnon73133 ChaniaCreteGreece University of Bordeaux CNRSCEACELIA(Centre Lasers Intenses et Applications)UMR 5107F-33405 TalenceFrance Department of Physics University of IoanninaGR 45110 IoanninaGreece LULI-CNRS CEASorbonne UniversiesEcole PolytechniqueInstitut Polytechnique de Paris-F-91128 Palaiseau CedexFrance Observatoire de Paris 5 Place J JanssenMeudon 92195France Centre for Plasma Physics School of Mathematics and PhysicsQueen’s University BelfastBelfast BT71NNUK Centro de Láseres Pulsados(CLPU) Edificio M5Parque CientficoC/Adaja 837185 VillamayorSalamancaSpain University of Salamanca 37008 SalamancaSpain Faculty of Nuclear Sciences and Physical Engineering Czech Technical University in PragueBrehova 711519Prague 1Czech Republic University Institute for Educational Sciences University of Salamanca37008 SalamancaSpain Group of Research“Interaction and e Learning”(GRIAL) University of Salamanca37008 SalamancaSpain CLPU Laser-Plasma Chair at University of Salamanca 37008 SalamancaSpain

The second and final year of 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 4 weeks a year,and the programme spans 2 *** aims to train students from across Europe in theoretical,applied and laboratory skills relevant to the pursuit of research in laser plasma interaction physics and inertial confinement *** are intermingled with laboratory sessions and continuous assessment *** programme,which is led by workers from the Hellenic Mediterranean University 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 finished its second and final *** Learning Teaching Training activities have been held at the Queen’s University Belfast,the University of Bordeaux,the Czech Technical University,the University of Salamanca and the Institute of Plasma Physics and Lasers of the Hellenic Mediterranean *** last of these institutes hosted two 2-week-long Intensive Programmes,while the activities at the other four universities were each 5 days in *** addition,a’Multiplier Event’was held at the University of Ioannina,which will be briefly *** this second year,the work has concentrated on training in both experimental diagnostics and simulation techniques appropriate to the study of 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 will be *** particular,this paper will f

关键词： laser plasma interactions postgraduate education

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