Ultra-low Emittance Electron Beams from Two-color LaserIonization Injection

被引：7

作者：

Yu, L. -L. ^{[1
,2
]}

Esarey, E. ^{[1
]}

Schroeder, C. B. ^{[1
]}

Vay, J. -L. ^{[1
]}

Benedetti, C. ^{[1
]}

Geddes, C. G. R. ^{[1
]}

Chen, M. ^{[2
]}

Leemans, W. P. ^{[1
]}

机构：

[1] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[2] Shanghai Jiao Tong Univ, Dept Phys & Astron, Minist Educ, Key Lab Laser Plasmas, Shanghai 200240, Peoples R China

来源：

ADVANCED ACCELERATOR CONCEPTS, (AAC 2014) | 2016年 / 1777卷

关键词：

LASER; WAKEFIELD;

D O I：

10.1063/1.4965621

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this paper we discuss how we used two laser pulses of different colors to generate femtosecond, ultralow emittance (similar to 10(-2) mm mrad) electron beams in a laser-driven plasma-based accelerator. A long-wavelength pump pulse was used to excite a large wake without fully ionizing a high-Z gas. A short-wavelength injection pulse, with a small ponderomotive force and large peak electric field, ionizes a fraction of the remaining bound electrons into trapped wake orbits with a small quiver momentum. Two-dimensional (2D) Particle-In-Cell (PIC) simulations show that the transverse emittance of the injected beam can be an order of magnitude smaller than previously achieved in laser-plasma accelerators.

引用

页数：5

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