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First radiative shock experiments on the SG-Ⅱ laser

High Power Laser Science and Engineering 2021年第2期9卷 198-205页

作者： Francisco Suzuki-Vidal Thomas Clayson Chantal Stehlé Uddhab Chaulagain Jack W.D.Halliday Mingying Sun Lei Ren Ning Kang Huiya Liu Baoqiang Zhu Jianqiang Zhu Carolina De Almeida Rossi Teodora Mihailescu Pedro Velarde manuel cotelo John M.Foster Colin N.Danson Christopher Spindloe Jeremy P.Chittenden Carolyn Kuranz Blackett Laboratory Imperial College London First Light Fusion Ltd 3. Magdrive Ltd LERMA Sorbonne-Université ELI Beamlines Center Institute of Physics Czech Academy of Sciences Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Instituto de Fusión Nuclear Guillermo Velarde Universidad Politécnica de Madrid AWE plc. Aldermaston Science and Technology Facilities Council Rutherford Appleton LaboratoryHarwell Campus University of Michigan

We report on the design and first results from experiments looking at the formation of radiative shocks on the Shenguang-Ⅱ(SG-Ⅱ) laser at the Shanghai Institute of Optics and Fine Mechanics in ***-heating of a two-layer CH/CH-Br foil drives a～40 km/s shock inside a gas cell filled with argon at an initial pressure of 1 *** use of gas-cell targets with large(several millimetres) lateral and axial extent allows the shock to propagate freely without any wall interactions,and permits a large field of view to image single and colliding counter-propagating shocks with time-resolved,pointprojection X-ray backlighting(～20 μm source size,4.3 keV photon energy).Single shocks were imaged up to 100 ns after the onset of the laser drive,allowing to probe the growth of spatial nonuniformities in the shock *** results are compared with experiments looking at counter-propagating shocks,showing a symmetric drive that leads to a collision and stagnation from～40 ns *** present a preliminary comparison with numerical simulations with the radiation hydrodynamics code ARWEN,which provides expected plasma parameters for the design of future experiments in this facility.

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First radiative shock experiments on the SG-II laser

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High Power Laser Science and Engineering 2021年第2期9卷 193-200页

作者： Francisco Suzuki-Vidal Thomas Clayson Chantal Stehlé Uddhab Chaulagain Jack W.D.Halliday Mingying Sun Lei Ren Ning Kang Huiya Liu Baoqiang Zhu Jianqiang Zhu Carolina De Almeida Rossi Teodora Mihailescu Pedro Velarde manuel cotelo John M.Foster Colin N.Danson Christopher Spindloe Jeremy P.Chittenden Carolyn Kuranz Blackett Laboratory Imperial College LondonLondonUK First Light Fusion Ltd YarntonUK LERMA Sorbonne-UniversitéObservatoire de ParisCNRSFrance ELI Beamlines Center Institute of PhysicsCzech Academy of SciencesDolni BrezanyCzech Republic Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghaiChina Instituto de Fusión Nuclear Guillermo Velarde Universidad Politécnica de MadridMadridSpain AWE plc. AldermastonReadingUK Science and Technology Facilities Council Rutherford Appleton LaboratoryHarwell CampusChiltonDidcotUK University of Michigan Ann ArborMIUSA Current affiliation:Magdrive Ltd HarwellUK

We report on the design and first results from experiments looking at the formation of radiative shocks on the ShenguangII(SG-II)laser at the Shanghai Institute of Optics and Fine Mechanics in ***-heating of a two-layer CH/CH–Br foil drives a∼40 km/s shock inside a gas cell filled with argon at an initial pressure of 1 *** use of gas-cell targets with large(several millimetres)lateral and axial extent allows the shock to propagate freely without any wall interactions,and permits a large field of view to image single and colliding counter-propagating shocks with time-resolved,pointprojection X-ray backlighting(∼20µm source size,4.3 keV photon energy).Single shocks were imaged up to 100 ns after the onset of the laser drive,allowing to probe the growth of spatial nonuniformities in the shock *** results are compared with experiments looking at counter-propagating shocks,showing a symmetric drive that leads to a collision and stagnation from∼40 ns *** present a preliminary comparison with numerical simulations with the radiation hydrodynamics code ARWEN,which provides expected plasma parameters for the design of future experiments in this facility.

关键词： high energy density physics laboratory astrophysics plasma physics high-power laser laser-driven shocks experiments X-ray backlighting X-ray radiography

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