Rescattering of stimulated Raman side scattering in nonuniform plasmasOA
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.
S.Tan;Q.Wang;Y.Chen;W.B.Yao;C.Z.Xiao;J.F.Myatt;
School of Physics and Electronics,Hunan University,Changsha 410082,ChinaInstitute of Applied Physics and Computational Mathematics,Beijing 100094,ChinaSchool of Electrical and Information Engineering,Anhui University of Science and Technology,Huainan,Anhui 232001,ChinaDepartment of Electrical and Computer Engineering,University of Alberta,9211116 St.NW,Edmonton,Alberta T6G 1H9,Canada
物理学
nonuniformaccelerationscattering
《Matter and Radiation at Extremes》 2024 (005)
P.68-76 / 9
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).
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