First radiative shock experiments on the SG-II laser  

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 

机构地区：[1]Blackett Laboratory,Imperial College London,London,UK [2]First Light Fusion Ltd,Yarnton,UK [3]LERMA,Sorbonne-Université,Observatoire de Paris,CNRS,France [4]ELI Beamlines Center,Institute of Physics,Czech Academy of Sciences,Dolni Brezany,Czech Republic [5]Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai,China [6]Instituto de Fusión Nuclear Guillermo Velarde,Universidad Politécnica de Madrid,Madrid,Spain [7]AWE plc.,Aldermaston,Reading,UK [8]Science and Technology Facilities Council,Rutherford Appleton Laboratory,Harwell Campus,Chilton,Didcot,UK [9]University of Michigan,Ann Arbor,MI,USA [10]Current affiliation:Magdrive Ltd,Harwell,UK

出　　处：《High Power Laser Science and Engineering》2021年第2期193-200,共8页高功率激光科学与工程（英文版）

基　　金：the Royal Society(UK)through a University Research Fellowship(URF-R-180032);a Research Fellows Enhancement Award(RGF-EA-180240);an International Exchanges grant(IES-R3-170140);a Research Grant(RG2017-R2);The authors would like to thank the operation group of the SG-II laser facility.C.S.acknowledges support from the French INSU-PNPS programme.U.C.acknowledges support by the project Advanced Research(CZ.02.1.01/0.0/0.0/16_019/0000789)from European Regional Development Fund(ADONIS)。

摘　　要：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 China.Laser-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 bar.The 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 apex.These results are compared with experiments looking at counter-propagating shocks,showing a symmetric drive that leads to a collision and stagnation from∼40 ns onward.We 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 

分 类 号：TN248[电子电信—物理电子学]