Effects of sidelobes of focused flat-topped laser beams on vacuum electron acceleration

doi:10.1007/s00340-007-2673-z

	Effects of sidelobes of focused flat-topped laser beams on vacuum electron acceleration
	Wang, W.; Wang, P. X.; Ho, Y. K.; Kong, Q.; Gu, Y.; Wang, S. J.
刊名	APPLIED PHYSICS B-LASERS AND OPTICS
	2007-07-01
卷号	88 页码:273-279
ISSN号	0946-2171
DOI	10.1007/s00340-007-2673-z
英文摘要	Using three-dimensional test particle simulations, we investigated electrons accelerated by a focused flat-top laser beam at different intensities and flatness levels of the beam profile before focusing in vacuum. The results show that the presence of sidelobes around the main focal spot of the focused flat-top laser beam influences the optimum (as far as electron acceleration is concerned) initial momentum (and incident angle) of electrons for acceleration. The difference of initial conditions between laser beams with and without sidelobes becomes evident when the laser field is strong enough (a(0)> 10, corresponding to intensities 1 > 1x10(20) W/cm(2) for the laser wavelength lambda=1 mu m, where a(0) is a dimensionless parameter measuring laser intensity). The difference becomes more pronounced at increasing a(0). Because of the presence of sidelobes, there exist three typical CAS (capture and acceleration scenario) channels when a(0) >= 30 (corresponding to 1 > 1x10(21) W/cm(2) for lambda=1 mu m). The energy spread of the outgoing electrons is also discussed in detail.
WOS关键词	FLATTENED GAUSSIAN BEAMS ; SHORT-PULSE LASER ; INTENSE LASER ; COMPTON-SCATTERING ; PONDEROMOTIVE SCATTERING ; RELATIVISTIC ELECTRONS ; MAGNETIC-FIELD ; GENERATION ; REFRACTION
WOS研究方向	Optics ; Physics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000248054900022
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/27563]
专题	中国科学院近代物理研究所
通讯作者	Wang, W.
作者单位	1.Fudan Univ, Inst Modern Phys, Key Lab Minist Educ, Appl Ion Beam Phys Lab, Shanghai 200433, Peoples R China 2.Shanghai Inst Laser Plasma, Shanghai 201800, Peoples R China
推荐引用方式 GB/T 7714	Wang, W.,Wang, P. X.,Ho, Y. K.,et al. Effects of sidelobes of focused flat-topped laser beams on vacuum electron acceleration[J]. APPLIED PHYSICS B-LASERS AND OPTICS,2007,88:273-279.
APA	Wang, W.,Wang, P. X.,Ho, Y. K.,Kong, Q.,Gu, Y.,&Wang, S. J..(2007).Effects of sidelobes of focused flat-topped laser beams on vacuum electron acceleration.APPLIED PHYSICS B-LASERS AND OPTICS,88,273-279.
MLA	Wang, W.,et al."Effects of sidelobes of focused flat-topped laser beams on vacuum electron acceleration".APPLIED PHYSICS B-LASERS AND OPTICS 88(2007):273-279.