title: Multichromatic narrow-energy-spread electron bunches from laser-wakefield acceleration with dual-color lasers.
abstract: A method based on laser wakefield acceleration with controlled ionization injection triggered by another frequency-tripled laser is proposed, which can produce electron bunches with low energy spread. As two color pulses copropagate in the background plasma, the peak amplitude of the combined laser field is modulated in time and space during the laser propagation due to the plasma dispersion. Ionization injection occurs when the peak amplitude exceeds a certain threshold. The threshold is exceeded for limited duration periodically at different propagation distances, leading to multiple ionization injections and separated electron bunches. The method is demonstrated through multidimensional particle-in-cell simulations. Such electron bunches may be used to generate multichromatic x-ray sources for a variety of applications.
authors.affiliation: Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.|IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: M
authors.initials: M
authors.lastname: Zeng
authors.affiliation: Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.|IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: M
authors.initials: M
authors.lastname: Chen
authors.affiliation: Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.|IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: L L
authors.initials: LL
authors.lastname: Yu
authors.affiliation: University of California, Los Angeles, California 90095, USA.
authors.forename: W B
authors.initials: WB
authors.lastname: Mori
authors.affiliation: Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.|IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China.|SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG, United Kingdom.
authors.forename: Z M
authors.initials: ZM
authors.lastname: Sheng
authors.affiliation: SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG, United Kingdom.
authors.forename: B
authors.initials: B
authors.lastname: Hidding
authors.affiliation: SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG, United Kingdom.
authors.forename: D A
authors.initials: DA
authors.lastname: Jaroszynski
authors.affiliation: Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.|IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: J
authors.initials: J
authors.lastname: Zhang