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Phase imaging of irradiated foils at the OMEGA EP facility using phase-stepping X-ray Talbot–Lau deflectometry

High Power Laser Science and Engineering 2023年第4期11卷 45-54页

作者： G.Pérez-Callejo V.Bouffetier L.Ceurvorst T.Goudal S.R.Klein D.Svyatskiy M.Holec P.Perez-Martin K.Falk a.casner T.E.Weber G.Kagan M.P.Valdivia Departamento de Física Teórica Atómica yÓptica Universidad de ValladolidValladolidSpain Universitéde Bordeaux-CNRS-CEA Centre Lasers Intenses et Applications(CELIA)UMR 5107TalenceFrance European XFEL GmbH SchenefeldGermany Laboratory for Laser Energetics RochesterNew YorkUSA CEA-DAM DIFArpajonFrance University of Michigan Ann ArborMichiganUSA Los Alamos National Laboratory Los AlamosNew MexicoUSA Lawrence Livermore National Laboratory LivermoreCaliforniaUSA Helmholtz-Zentrum Dresden-Rossendorf DresdenGermany Technische Universität Dresden DresdenGermany Institute of Physics of the ASCR PragueCzech Republic CEA-CESTA CS 60001Le Barp CedexFrance Blackett Laboratory Imperial College LondonLondonUK Department of Astrophysics and Astronomy The Johns Hopkins UniversityBaltimoreMarylandUSA Center for Energy Research University of California San DiegoSan DiegoCaliforniaUSA

Diagnosing the evolution of laser-generated high energy density(HED)systems is fundamental to develop a correct understanding of the behavior of matter under extreme ***–Lau interferometry constitutes a promising tool,since it permits simultaneous single-shot X-ray radiography and phase-contrast imaging of dense *** present the results of an experiment at OMEGA EP that aims to probe the ablation front of a laser-irradiated foil using a Talbot–Lau X-ray interferometer.A polystyrene(CH)foil was irradiated by a laser of 133 J,1 ns and probed with 8 keV laser-produced backlighter radiation from Cu foils driven by a short-pulse laser(153 J,11 ps).The ablation front interferograms were processed in combination with a set of reference images obtained ex situ using *** managed to obtain attenuation and phase-shift images of a laser-irradiated foil for electron densities above 1022 cm−*** results showcase the capabilities of Talbot–Lau X-ray diagnostic methods to diagnose HED laser-generated plasmas through high-resolution imaging.

关键词： deflectometry OMEGA EP phase-contrast imaging Talbot-Lau X-ray interferometry

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On the study of hydrodynamic instabilities in the presence of background magnetic fields in high-energy-density plasmas

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Matter and Radiation at Extremes 2021年第2期6卷 37-45页

作者： M.J.-E.Manuel B.Khiar G.Rigon B.Albertazzi S.R.Klein F.Kroll F.-E.Brack T.Michel P.Mabey S.Pikuz J.C.Williams M.Koenig a.casner C.C.Kuranz General Atomics San DiegoCalifornia 92121USA University of Chicago ChicagoIllinois 60637USA Laboratoire pour l’utilisation des lasers intenses 91128 Palaiseau CedexFrance University of Michigan Ann ArborMichigan 48109USA Helmholtz-Zentrum Dresden-Rossendorf 01328 DresdenGermany Technische Universitat Dresden 01062 DresdenGermany National Research Nuclear University Moscow 115409Russia Centre lasers intenses et applications 33405 Talence CedexFrance

Blast-wave-driven hydrodynamic instabilities are studied in the presence of a background B-field through experiments and simulations in the high-energy-density(HED)physics *** experiments conducted at the Laboratoire pour l’utilisation des lasers intenses(LULI),a laserdriven shock-tube platform was used to generate a hydrodynamically unstable interface with a prescribed sinusoidal surface perturbation,and short-pulse x-ray radiography was used to characterize the instability growth with and without a 10-T *** LULI experiments were modeled in FLASH using resistive and ideal magnetohydrodynamics(MHD),and comparing the experiments and simulations suggests that the Spitzer model implemented in FLASH is necessary and sufficient for modeling these planar *** results suggest insufficient amplification of the seed B-field,due to resistive diffusion,to alter the hydrodynamic *** the ideal-MHD simulations did not represent the experiments accurately,they suggest that similar HED systems with dynamic plasma-β(=2μ_(0)ρv^(2)/B^(2))values of less than∼100 can reduce the growth of blast-wave-driven Rayleigh–Taylor *** findings validate the resistive-MHD FLASH modeling that is being used to design future experiments for studying B-field effects in HED plasmas.

关键词： field. hydrodynamic instabilities

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Analytical modelling of the expansion of a solid obstacle interacting with a radiative shock

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High Power Laser Science and Engineering 2018年第2期6卷 123-132页

作者： Th.Michel E.Falize B.Albertazzi G.Rigon Y.Sakawa T.Sano H.Shimogawara R.Kumar T.Morita C.Michaut a.casner R Barroso P.Mabey Y.Kuramitsu S.Laffite L.Van Box Som G.Gregori R.Kodama N.Ozaki P.Tzeferacos D.Lamb M.Koenig luli-cnrs ecole polytechniquecea:universite paris-saclayupmc univ paris 06:sorbonne universites-f-91128 palaiseau cedexFrance cea damdifF-91297 ArpajonFrance cea saclay dsm/irfu/service d'astrophysiqueF-91191 Gif-sur-YvetteFrance institute of laser engineering osaka universitySuitaOsaka 565-0871Japan faculty of engineering sciences kyushu university6-1 Kasuga-KoenKasugaFukuoka 816-8580Japan luth observatoire de parispsl research universitycnrsuniversite paris diderotSorbonne Paris Cite92190 MeudonFrance universite de bordeaux-cnrs-cea celia UMR 5107F-33405 TalenceFrance gepi observatoire de parispsl research universitycnrsuniversite paris diderotSorbonne Paris Cite75014 ParisFrance graduate school of engineering osaka universitySuitaOsaka 565-0871Japan lerma observatoire de parispsl research universitycnrssorbonne universitesUPMC Univ.Paris 06F-75005 ParisFrance clarendon laboratory university of oxfordParks RoadOxford OX1 3PUUK flash center for computational science university of chicagoIL 60637USA

In this paper, we present a model characterizing the interaction of a radiative shock(RS) with a solid material, as described in a recent paper(Koenig et al., Phys. Plasmas, 24, 082707(2017)), the new model is then related to recent experiments performed on the GEKKO XII laser facility. The RS generated in a xenon gas cell propagates towards a solid obstacle that is ablated by radiation coming from the shock front and the radiative precursor, mimicking processes occurring in astrophysical phenomena. The model presented here calculates the dynamics of the obstacle expansion,which depends on several parameters, notably the geometry and the temperature of the shock. All parameters required for the model have been obtained from experiments. Good agreement between experimental data and the model is found when spherical geometry is taken into account. As a consequence, this model is a useful and easy tool to infer parameters from experimental data(such as the shock temperature), and also to design future experiments.

关键词： high energy density physics laser–plasmas interaction modelling plasmas astrophysics plasma physics radiative hydrodynamics radiative shock

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Development of new diagnostics based on LiF detector for pump-probe experiments

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Matter and Radiation at Extremes 2018年第4期3卷 197-206页

作者： T.Pikuz A.Faenov NOzaki T.Matsuoka B.Albertazzi N.J.Hartley K.Miyanishi K.Katagiri S.Matsuyama K.Yamauchi H.Habara Y.Inubushi T.Togashi H.Yumoto H.Ohashi Y.Tange T.Yabuuchi M.Yabashi A.N.Grum-Grzhimailo a.casner I.Skobelev S.Makarov S.Pikuz G.Rigon M.Koenig K.A.Tanaka T.Ishikawa R.Kodama Graduate School of Engineering Osaka UniversitySuitaOsaka 565-0871Japan Joint Institute for High Temperatures Russian Academy of SciencesMoscow 125412Russia Open and Transdisciplinary Research Initiatives Osaka UniversitySuitaOsaka 565-0871Japan Photon Pioneers Center Osaka UniversitySuitaOsaka 565-0871Japan LULI e CNRS Ecole PolytechniqueCEA:Universite Paris-SaclayUPMC Univ Paris 06:Sorbonne Universites-F-91128 Palaiseau cedexFrance Helmholtz-Zentrum Dresden-Rossendorf Dresden 01328Germany Japan Synchrotron Radiation Research Institute Sayo-choSayo-gunHyogo 679-5198Japan RIKEN Spring-8 Center Sayo-choSayo-gunHyogo 679-5148Japan Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State UniversityMoscow 119991Russia Universite de Bordeaux-CNRS-CEA CELIA(Center Lasers Intenses et Applications)UMR 5107F-33405 TalenceFrance National Research Nuclear University MEPhI Moscow 115409Russia ELI-NP/IFN-HH Maqurele-Bucharest 077125 Romania ILE Osaka UniversitySuitaOsaka 565-0871Japan

We present new diagnostics for use in optical laser pump-X-ray Free Electron Laser(XFEL)probe experiments to monitor dimensions,intensity profile and focusability of the XFEL beam and to control initial quality and homogeneity of targets to be driven by optical laser *** developing X-ray imaging,based on the use of an LiF crystal detector,we were able to measure the distribution of energy inside a hard X-ray beam with unprecedented high spatial resolution(~1 mm)and across a field of view larger than some *** diagnostic can be used in situ,provides a very high dynamic range,has an extremely limited cost,and is relatively easy to be implemented in pump-probe *** proposed methods were successfully applied in pump-probe experiments at the SPring-8 Angstrom Compact free electron LAser(SACLA)XFEL facility and its potential was demonstrated for current and future High Energy Density Science experiments.

关键词： XFEL Shock waves Pump-probe experiments High energy density science X-ray spectroscopy X-ray imaging

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Turbulent hydrodynamics experiments in high energy density plasmas： scientific case and preliminary results of the TurboHEDP project

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High Power Laser Science and Engineering 2018年第3期6卷 50-64页

作者： A. casner G. Rigon B. Albertazzi Th. Michel T. Pikuz A. Faenov P. Mabey N. Ozaki Y. Sakawa T. Sano J. Ballet P. Tzeferacos D. Lamb E. Falize G. Gregori M. Koenig Universite de Bordeaux-CNRS-CEA CELIA (CEntre Lasers Intenses et Applications) UMR 5107 F-33405 Talence France LULI- CNRS Ecole Polytechnique CEA Universite Paris-Saclay UPMC Univ Paris 06 : Sorbonne Universites -F-91128 Palaiseau cedex France ENS Lyon Universite de Lyon CHELS 69342 Lyon France Open and Transdisciplinary Research Initiatives Osaka University Suita Osaka 565-0871 Japan Joint Institute for High Temperature RAS Moscow 125412 Russia Graduate School of Engineering Osaka University Suita Osaka 565-0871 Japan Institute of Laser Engineering Osaka University Suita Osaka 565-0871 Japan Laboratoire AIM CEA-IRFU/CNRS/Universite Paris Diderot Departement d'Astrophysique CEA Saclay F-91191 Gif sur Yvette France Flash Center for Computational Science University of Chicago USA CEA DAM DIF F-91297 Arpajon France Clarendon Laboratory University of Oxford Parks Road Oxford OX1 3PU UK

The physics of compressible turbulence in high energy density(HED) plasmas is an unchartered experimental *** of compressible and radiative flows relevant for astrophysics rely mainly on subscale parameters. Therefore,we plan to perform turbulent hydrodynamics experiments in HED plasmas(TurboHEDP) in order to improve our understanding of such important phenomena for interest in both communities: laser plasma physics and astrophysics. We will focus on the physics of supernovae remnants which are complex structures subject to fluid instabilities such as the Rayleigh–Taylor and Kelvin–Helmholtz instabilities. The advent of megajoule laser facilities, like the National Ignition Facility and the Laser Megajoule, creates novel opportunities in laboratory astrophysics, as it provides unique platforms to study turbulent mixing flows in HED plasmas. Indeed, the physics requires accelerating targets over larger distances and longer time periods than previously achieved. In a preparatory phase, scaling from experiments at lower laser energies is used to guarantee the performance of future MJ experiments. This subscale experiments allow us to develop experimental skills and numerical tools in this new field of research, and are stepping stones to achieve our objectives on larger laser facilities. We review first in this paper recent advances in high energy density experiments devoted to laboratory astrophysics. Then we describe the necessary steps forward to commission an experimental platform devoted to turbulent hydrodynamics on a megajoule laser facility. Recent novel experimental results acquired on LULI2000, as well as supporting radiative hydrodynamics simulations, are presented. Together with the development of LiF detectors as transformative X-ray diagnostics, these preliminary results are promising on the way to achieve micrometric spatial resolution in turbulent HED physics experiments in the near future.

关键词：高能密度湍流物理激光技术发展现状

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一个不小心,科技就成了“隐形杀手”

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新东方英语（中英文版） 2017年第11期 43-47页

作者： Steve casner 崔丞

有了智能手机，我们再也不担心会错过消息。可你知道因看手机分心而导致的交通事故有多少吗？用扫地机器人打扫超方便。可你想过万一黑客入侵。机器人也会变杀手吗？各种新科技的不断涌现的确给我们的生活带来了诸多便利和惊喜，然而一... 详细信息

有了智能手机，我们再也不担心会错过消息。可你知道因看手机分心而导致的交通事故有多少吗？用扫地机器人打扫超方便。可你想过万一黑客入侵。机器人也会变杀手吗？各种新科技的不断涌现的确给我们的生活带来了诸多便利和惊喜，然而一些隐蔽的危险也正潜藏其中，不易察觉……

关键词：新科技杀手隐形智能手机交通事故黑客入侵机器人

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