Electron Acceleration During the Mode Transition from Laser Wakefield to Plasma Wakefield Acceleration with a Dense-Plasma Wall  

作　　者：刘明萍 刘三秋 何俊 刘杰 

机构地区：[1]College of Information Engineering,Nanchang University [2]Key Laboratory of Beam Technology and Materials Modification of the Ministry of Education,Beijing Normal University [3]Department of Physics,Nanchang University [4]Institute of Applied Physics and Computational Mathematics

出　　处：《Plasma Science and Technology》2013年第9期841-844,共4页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.11047152,11147005 and 11178002);The Natural Science Foundation of Jiangxi Province of China(Nos.2010GQW0048,20122BAB202003)

摘　　要：The wake bubble expansion and contraction by adding a dense-plasma wall in the background plasma during the mode transition from laser wakefield to plasma wakefield accel- eration is investigated by particle-in-cell simulations. The electrons are injected continuously into the cavity until the lateral bubble size equals the inner diameter of the wall. The injected electron bunch from the laser wakefield acceleration （LWFA） scheme is quasi phase-stably accel- erated forward because of the longitudinal contraction of the bubble. After the laser pulse is depleted completely, the electron bunch generated from the LWFA scheme drives a plasma wake- field. The electrons remaining in the channel are trapped and accelerated by the plasma wakefield. Ultimately, two energetic electron bunches with a narrow energy spread and low emittance are obtained.The wake bubble expansion and contraction by adding a dense-plasma wall in the background plasma during the mode transition from laser wakefield to plasma wakefield accel- eration is investigated by particle-in-cell simulations. The electrons are injected continuously into the cavity until the lateral bubble size equals the inner diameter of the wall. The injected electron bunch from the laser wakefield acceleration （LWFA） scheme is quasi phase-stably accel- erated forward because of the longitudinal contraction of the bubble. After the laser pulse is depleted completely, the electron bunch generated from the LWFA scheme drives a plasma wake- field. The electrons remaining in the channel are trapped and accelerated by the plasma wakefield. Ultimately, two energetic electron bunches with a narrow energy spread and low emittance are obtained.

关 键 词：quasi phase-stable acceleration monoenergetic electron bunch dense-plasmawall 

分 类 号：TN248.6[电子电信—物理电子学] O53[理学—等离子体物理]