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Proceedings Paper

Low transverse emittance electron bunches from two-color laser-ionization injection
Author(s): Lu-Le Yu; Eric Esarey; Jean-Luc Vay; Carl B. Schroeder; Carlo Benedetti; Cameron G. R. Geddes; Sergey G. Rykovanov; Stepan S. Bulanov; Min Chen; Wim P. Leemans
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Paper Abstract

A method is proposed to generate low emittance electron bunches from two color laser pulses in a laser-plasma accelerator. A two-region gas structure is used, containing a short region of a high-Z gas (e.g., krypton) for ionization injection, followed by a longer region of a low-Z gas for post-acceleration. A long-laser-wavelength (e.g., 5 μm) pump pulse excites plasma wake without triggering the inner-shell electron ionization of the high-Z gas due to low electric fields. A short-laser-wavelength (e.g., 0.4 μm) injection pulse, located at a trapping phase of the wake, ionizes the inner-shell electrons of the high-Z gas, resulting in ionization-induced trapping. Compared with a single-pulse ionization injection, this scheme offers an order of magnitude smaller residual transverse momentum of the electron bunch, which is a result of the smaller vector potential amplitude of the injection pulse.

Paper Details

Date Published: 9 May 2013
PDF: 9 pages
Proc. SPIE 8779, Laser Acceleration of Electrons, Protons, and Ions II; and Medical Applications of Laser-Generated Beams of Particles II; and Harnessing Relativistic Plasma Waves III, 877908 (9 May 2013); doi: 10.1117/12.2021089
Show Author Affiliations
Lu-Le Yu, Lawrence Berkeley National Lab. (United States)
Univ. of California, Berkeley (United States)
Eric Esarey, Lawrence Berkeley National Lab. (United States)
Jean-Luc Vay, Lawrence Berkeley National Lab. (United States)
Carl B. Schroeder, Lawrence Berkeley National Lab. (United States)
Carlo Benedetti, Lawrence Berkeley National Lab. (United States)
Cameron G. R. Geddes, Lawrence Berkeley National Lab. (United States)
Sergey G. Rykovanov, Lawrence Berkeley National Lab. (United States)
Stepan S. Bulanov, Lawrence Berkeley National Lab. (United States)
Min Chen, Shanghai Jiao Tong Univ. (China)
Wim P. Leemans, Lawrence Berkeley National Lab. (United States)
Univ. of California, Berkeley (United States)


Published in SPIE Proceedings Vol. 8779:
Laser Acceleration of Electrons, Protons, and Ions II; and Medical Applications of Laser-Generated Beams of Particles II; and Harnessing Relativistic Plasma Waves III
Eric Esarey; Dino A. Jaroszynski; Carl B. Schroeder; Wim P. Leemans; Kenneth W. D. Ledingham, Editor(s)

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