Acceleration and radiation of externally injected electrons in laser plasma wakefield driven by a Laguerre

Acceleration and radiation of externally injected electrons in laser plasma wakefield driven by a Laguerre–Gaussian pulse

Shen Zhong-Chen^{1, 2}, Chen Min^{1, 2, †}, Zhang Guo-Bo^{1, 3}, Luo Ji^{1, 2}, Weng Su-Ming^{1, 2}, Yuan Xiao-Hui^{1, 2}, Liu Feng^{1, 2}, Sheng Zheng-Ming^{1, 2, 4}

(color online) (a) Spatial distributions of fields combination (E_y − B_z) and externally injected electrons in the plane of x = 189.5 μm. The trajectory projection in the y–z plane of a typical accelerated electron is also shown. The rectangle and triangle mark the start and end positions of the trajectory, respectively. The upper color bar shows the field combination and the lower color bar shows the electron charge. (b) Spatial distribution of field combination (E_z + B_y) and externally injected electrons at the same position.