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. 9. Single-shot electron beam spectra from the single-stage LWFA a#cod#x2013;c and the two-stage LWFA d#cod#x2013;e. The thickness of the second stage is 1 mm. [ 17 ]