首页|Rescattering of stimulated Raman side scattering in nonuniform plasmas
Rescattering of stimulated Raman side scattering in nonuniform plasmas
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Rescattering of stimulated Raman side scattering(SRSS)is observed for the first time via two-dimensional(2D)particle-in-cell(PIC)sim-ulations.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
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School of Physics and Electronics,Hunan University,Changsha 410082,China
Institute of Applied Physics and Computational Mathematics,Beijing 100094,China
School of Electrical and Information Engineering,Anhui University of Science and Technology,Huainan Anhui 232001,China
Department of Electrical and Computer Engineering,University of Alberta,9211116 St.NW,Edmonton,Alberta T6G 1H9,Canada
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Strategic Priority Research Program of the Chinese Academy of SciencesFund of the National Key Laboratory of Plasma PhysicsNational Natural Science Foundation of ChinaChina Postdoctoral Science FoundationAnhui Provincial Natural Science Foundation
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