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. 6. Evolutions of the normalized amplitude a solid green line and the peak energy of the phase-locked electron beam solid blue line as a function of the distance z mm. [ 67 ]