title: Energetic electron-bunch generation in a phase-locked longitudinal laser electric field.
abstract: Energetic electron acceleration processes in a plasma hollow tube irradiated by an ultraintense laser pulse are investigated. It is found that the longitudinal component of the laser field is much enhanced when a linear polarized Gaussian laser pulse propagates through the plasma tube. This longitudinal field is of π/2 phase shift relative to the transverse electric field and has a π phase interval between its upper and lower parts. The electrons in the plasma tube are first pulled out by the transverse electric field and then trapped by the longitudinal electric field. The trapped electrons can further be accelerated to higher energy in the presence of the longitudinal electric field. This acceleration mechanism is clearly illustrated by both particle-in-cell simulations and single particle modelings.
authors.affiliation: Center for Applied Physics and Technology, HEDPS, and School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors.forename: K D
authors.initials: KD
authors.lastname: Xiao
authors.affiliation: Center for Applied Physics and Technology, HEDPS, and School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors.forename: T W
authors.initials: TW
authors.lastname: Huang
authors.affiliation: Graduate School, China Academy of Engineering Physics, P.O. Box 2101, Beijing 100088, People's Republic of China.
authors.forename: L B
authors.initials: LB
authors.lastname: Ju
authors.affiliation: Center for Applied Physics and Technology, HEDPS, and School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors.forename: R
authors.initials: R
authors.lastname: Li
authors.affiliation: Center for Applied Physics and Technology, HEDPS, and School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors.forename: S L
authors.initials: SL
authors.lastname: Yang
authors.affiliation: Center for Applied Physics and Technology, HEDPS, and School of Physics, Peking University, Beijing 100871, People's Republic of China.
authors.forename: Y C
authors.initials: YC
authors.lastname: Yang
authors.affiliation: Institute of Applied Physics and Computational Mathematics, Beijing 100094, People's Republic of China.
authors.forename: S Z
authors.initials: SZ
authors.lastname: Wu
authors.affiliation: Institute of Applied Physics and Computational Mathematics, Beijing 100094, People's Republic of China.
authors.forename: H
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Center for Applied Physics and Technology, HEDPS, and School of Physics, Peking University, Beijing 100871, People's Republic of China.|State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China.|Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi, 030006, People's Republic of China.
authors.forename: B
authors.initials: B
authors.lastname: Qiao
authors.affiliation: College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, People's Republic of China.
authors.forename: S C
authors.initials: SC
authors.lastname: Ruan
authors.affiliation: Center for Applied Physics and Technology, HEDPS, and School of Physics, Peking University, Beijing 100871, People's Republic of China.|Institute of Applied Physics and Computational Mathematics, Beijing 100094, People's Republic of China.|College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, People's Republic of China.
authors.forename: C T
authors.initials: CT
authors.lastname: Zhou
authors.affiliation: Center for Applied Physics and Technology, HEDPS, and School of Physics, Peking University, Beijing 100871, People's Republic of China.|Institute of Applied Physics and Computational Mathematics, Beijing 100094, People's Republic of China.
authors.forename: X T
authors.initials: XT
authors.lastname: He