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The Acceleration of a Self-Injected Electron Bunch and Its Effect on the Laser Wakefield During the Laser-Plasma Interaction

LIU Ming-ping;TAO Zhi-peng;TAO Xiang-yang;TU Zhi-jun;CAO Ye;College of Information Engineering,Nanchang University;College of Physics & Communication Electronics,Jiangxi Normal University;  
The acceleration of a self-injected electron and its effect on the wakefield evolution during the laser-plasma interaction have been investigated. The space-charge electric field near the bubble bottom would be weakened by the self-injected electron bunch. The wakefield structure is strongly modified and the bubble elongates as the density of the self-injected electron bunch increases. The subsequent sheath electrons can be self-injected into the evolving bubble with higher initial longitudinal momentum. The self-injected electron bunch drives a plasma wakefield when its Coulomb field overwhelms the space-charge electric field of the bubble.
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