Simulations of Stimulated Raman Scattering in Low-Density Plasmas  

作　　者：曹莉华 常铁强 刘占军 郑春阳 

机构地区：[1]Institute of Applied Physics and Computational Mathematics,Beijing 100088,China

出　　处：《Plasma Science and Technology》2007年第4期422-426,共5页等离子体科学和技术（英文版）

基　　金：supported by National High Technology ICF Committee in China;the National Natural Science Fund of China(Nos.10675024,10335020,10375011 and 10576007);the Laboratory of Computational Physics(No.51479050205ZW0905)

摘　　要：Stimulated Raman particle-in-cell （PIC） simulations scattering （SRS） in a low-density The backward stimulated Raman plasma slab is investigated by scattering （B-SRS） dominates initially and erodes the head of the pump wave, while the forward stimulated Raman scattering （F-SRS） subsequently develops and is located at the rear part of the slab. Two-stage electron acceleration may be more efficient due to the coexistence of these two instabilities. The B-SRS plasma wave with low phase velocities can accelerate the background electrons which may be further boosted to higher energies by the F-SRS plasma wave with high phase velocities. The simulations show that the peaks of the main components in both the frequency and wave number spectra occur at the positions estimated from the phase-matching conditions.Stimulated Raman particle-in-cell （PIC） simulations scattering （SRS） in a low-density The backward stimulated Raman plasma slab is investigated by scattering （B-SRS） dominates initially and erodes the head of the pump wave, while the forward stimulated Raman scattering （F-SRS） subsequently develops and is located at the rear part of the slab. Two-stage electron acceleration may be more efficient due to the coexistence of these two instabilities. The B-SRS plasma wave with low phase velocities can accelerate the background electrons which may be further boosted to higher energies by the F-SRS plasma wave with high phase velocities. The simulations show that the peaks of the main components in both the frequency and wave number spectra occur at the positions estimated from the phase-matching conditions.

关 键 词：stimulated Raman scattering PIC simulation electron acceleration 

分 类 号：O572.322[理学—粒子物理与原子核物理]