Rescattering of stimulated Raman side scattering in nonuniform plasmas  

作　　者：S.Tan Q.Wang Y.Chen W.B.Yao C.Z.Xiao J.F.Myatt 

机构地区：[1]School of Physics and Electronics,Hunan University,Changsha 410082,China [2]Institute of Applied Physics and Computational Mathematics,Beijing 100094,China [3]School of Electrical and Information Engineering,Anhui University of Science and Technology,Huainan,Anhui 232001,China [4]Department of Electrical and Computer Engineering,University of Alberta,9211116 St.NW,Edmonton,Alberta T6G 1H9,Canada

出　　处：《Matter and Radiation at Extremes》2024年第5期68-76,共9页极端条件下的物质与辐射（英文）

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDA25050700);the Fund of the National Key Laboratory of Plasma Physics(Grant No.6142A04230103);the National Natural Science Foundation of China(Grant No.11805062);the China Postdoctoral Science Foundation(Grant No.2022M720513);the Anhui Provincial Natural Science Foundation(Grant No.2308085QA25).

摘　　要：Rescattering of stimulated Raman side scattering(SRSS)is observed for the first time via two-dimensional(2D)particle-in-cell(PIC)simulations.We construct a theoretical model for the rescattering process,which can predict the region of occurrence of mth-order SRSS and estimate its threshold.The rescattering process is identified by the 2D PIC simulations under typical conditions of a direct-drive inertial confinement fusion scheme.Hot electrons produced by second-order SRSS propagate nearly perpendicular to the density gradient and gain nearly the same energy as in first-order SRSS,but there is no cascade acceleration to produce superhot electrons.Parametric studies for a wide range of ignition conditions show that SRSS and associated rescatterings are robust and important processes in inertial confinement fusion.

关 键 词：NONUNIFORM ACCELERATION SCATTERING 

分 类 号：O53[理学—等离子体物理]