Collective absorption of laser radiation in plasma at sub-relativistic intensities

查看全文 作　　者：[1,2]Y.J.Gu;[1,3]O.Klimo;[4]Ph.Nicolai;[1]S.Shekhanov;[1,5]S.Weber;[1,4]V.T.Tikhonchuk

机构地区：[1]ELI-Beamlines,Institute of Physics,Czech Academy of Sciences,25241 Dolni Brezany,Czech Republic;[2]Institute of Plasma Physics of the CAS,Za Slovankou 1782/3,18200 Prague,Czech Republic;[3]Faculty of Nuclear Sciences and Physical Engineering,Czech Technical University in Prague,11519 Prague,Czech Republic;[4]Centre of Intense Lasers and Applications,University of Bordeaux,CNRS,CEA,33405 Talence,France;[5]School of Science,Xi'an Jiaotong University,Xi'an 710049,China

出　　处：《High Power Laser Science and Engineering》索引2019年第7卷第3期,共10页

基　　金：funding from the Euratom Research and Training Programme 2014–2018 under grant agreement No. 633053;supported by the project ELITAS (CZ.02.1.01/0.0/0.0/16 013/0001793);by the project High Field Initiative (CZ.02.1.01/0.0/0.0/15 003/ 0000449);from the European Regional Development Fund;supported by the project ADONIS (Advanced research using high intensity laser produced photons and particles), CZ.02.1.01/0.0/0.0/16 019/0000789;from the European Regional Development Fund;partially supported by the Center of Advanced Applied Natural Sciences, Reg. No. CZ.02.1.01/0.0/0.0/16 019/0000778;by the Operational Program Research, Development and Education;co-financed by the European Structural and Investment Funds;the state budget of the Czech Republic 摘　　要：Processes of laser energy absorption and electron heating in an expanding plasma in the range of irradiances Iλ^2=1015–1016 W·μm^2/cm^2 are studied with the aid of kinetic simulations.The results show a strong reflection due to stimulated Brillouin scattering and a significant collisionless absorption related to stimulated Raman scattering near and below the quarter critical density.Also presented are parametric decay instability and resonant excitation of plasma waves near the critical density.All these processes result in the excitation of high-amplitude electron plasma waves and electron acceleration.The spectrum of scattered radiation is significantly modified by secondary parametric processes,which provide information on the spatial localization of nonlinear absorption and hot electron characteristics.The considered domain of laser and plasma parameters is relevant for the shock ignition scheme of inertial confinement fusion. 关键词：INERTIAL CONFINEMENT fusion parametric INSTABILITIES

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Collective absorption of laser radiation in plasma at sub-relativistic intensities

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