Electron self-injection into the phase of a wake excited by a driver laser in a nonuniform density target

doi:10.1063/1.4926589

	Electron self-injection into the phase of a wake excited by a driver laser in a nonuniform density target
	Yu, Q.1; Gu, Y. J.2; Li, X. F.1; Huang, S.1; Kong, Q.1; Kawata, S.3
刊名	PHYSICS OF PLASMAS
	2015-07-01
卷号	22 页码:4
ISSN号	1070-664X
DOI	10.1063/1.4926589
英文摘要	It is well known that if electrons are externally injected into a density upramp, then their dephasing lengths will be extended greatly, and thus these electrons will gain more energy. However, we find that a density upramp can also be used to control the beam's collimation and the emittance that occurs by self-injection in the gradient. When electrons self-inject into the wakefield in a density gradient, an electron filtering mechanism is found to occur in the injection process. Electrons with high transverse velocities are scattered and only electrons with high longitudinal to transverse velocity ratios can be candidate electrons for self-injection. This causes the trapped electrons to be more highly collimated. In addition, the injection occurs near the axis, which causes the accelerated electron beam to have reduced emittance. An ultra-collimated electron beam with an angle spread of similar to 1 degrees and emittance of similar to 0.01 mm mrad is generated by a 2.5-dimensional particle-in-cell (2.5-D PIC) simulation. (C) 2015 AIP Publishing LLC.
资助项目	Natural Science Foundation of China[10605010] ; Shanghai Leading Academic Discipline Project[B107] ; JSPS-CAS Core-University Program on Plasma and Nuclear Fusion ; Utsunomiya University Center for Optical Research and Education
WOS关键词	WAKEFIELD ACCELERATOR
WOS研究方向	Physics
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000358933600053
资助机构	Natural Science Foundation of China ; Shanghai Leading Academic Discipline Project ; JSPS-CAS Core-University Program on Plasma and Nuclear Fusion ; Utsunomiya University Center for Optical Research and Education
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/40324]
专题	中国科学院近代物理研究所
通讯作者	Kong, Q.
作者单位	1.Fudan Univ, Inst Modern Phys, Appl Ion Beam Phys Lab, Key Lab,Minist Educ, Shanghai 200433, Peoples R China 2.ELI Beamlines Project, Inst Phys, ASCR, Prague 18221, Czech Republic 3.Utsunomiya Univ, Dept Adv Interdisciplinary Sci, Utsunomiya, Tochigi 3218585, Japan
推荐引用方式 GB/T 7714	Yu, Q.,Gu, Y. J.,Li, X. F.,et al. Electron self-injection into the phase of a wake excited by a driver laser in a nonuniform density target[J]. PHYSICS OF PLASMAS,2015,22:4.
APA	Yu, Q.,Gu, Y. J.,Li, X. F.,Huang, S.,Kong, Q.,&Kawata, S..(2015).Electron self-injection into the phase of a wake excited by a driver laser in a nonuniform density target.PHYSICS OF PLASMAS,22,4.
MLA	Yu, Q.,et al."Electron self-injection into the phase of a wake excited by a driver laser in a nonuniform density target".PHYSICS OF PLASMAS 22(2015):4.