Effect of density modulation on backward stimulated Raman Scattering in   a laser-irradiated plasma

doi:10.1063/1.4979170

CORC > 北京大学 > 工学院

	Effect of density modulation on backward stimulated Raman Scattering in a laser-irradiated plasma
	Zhang, H. C. ; Xiao, C. Z. ; Wang, Q. ; Feng, Q. S. ; Liu, Z. J. ; Zheng, C. Y.
刊名	PHYSICS OF PLASMAS
	2017
关键词	PARAMETRIC-INSTABILITIES WAVES BRILLOUIN COMPETITION
DOI	10.1063/1.4979170
英文摘要	The influence of an arbitrary static sinusoidal density modulation on Raman backscattering is discussed theoretically and numerically. One-dimensional Vlasov simulations show a suppression of convective gain of seed with large modulation amplitude epsilon or small modulation vector k(s), which is consistent with the modulation theory, namely, the generation of harmonics. However, this initial suppression is soon replaced by a periodic enhancement of reflectivity in the nonlinear stage due to the different performance of Langmuir wave propagation in density peaks and valleys. Modulation effects are also instantiated in electron acceleration. With large k(s), finite orders of harmonics may lead to obvious layers of the phase island structure, and local phase island mixing occurs when the wave amplitude increases. With small k(s), electrons could be accelerated by a series of adjacent harmonics from low phase velocity to high phase velocity step by step, which may produce a large number of superthermal electrons even with relativistic kinetic energy. Published by AIP Publishing.; National Natural Science Foundation of China [11575035, 11475030, 11375032, 11435011]; Science Challenge Project [JCKY2016212A505]; National Basic Research Program of China [2013CB834101]; SCI(E); ARTICLE; 3; 24
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/474802]
专题	工学院
推荐引用方式 GB/T 7714	Zhang, H. C.,Xiao, C. Z.,Wang, Q.,et al. Effect of density modulation on backward stimulated Raman Scattering in a laser-irradiated plasma[J]. PHYSICS OF PLASMAS,2017.
APA	Zhang, H. C.,Xiao, C. Z.,Wang, Q.,Feng, Q. S.,Liu, Z. J.,&Zheng, C. Y..(2017).Effect of density modulation on backward stimulated Raman Scattering in a laser-irradiated plasma.PHYSICS OF PLASMAS.
MLA	Zhang, H. C.,et al."Effect of density modulation on backward stimulated Raman Scattering in a laser-irradiated plasma".PHYSICS OF PLASMAS (2017).