Developments in laser wakefield accelerators: From single-stage to two-stage*
Li Wen-Tao, Wang Wen-Tao†, Liu Jian-Sheng‡, Wang Cheng, Zhang Zhi-Jun, Qi Rong, Yu Chang-Hai, Li Ru-Xin, Xu Zhi-Zhan
Fig. 7. Spatial and temporal evolution of the electron density on the longitudinal axis of the wake along the laser propagation in the moving simulation box. a Phase-locking case. b Dephasing case. [ 67 ]