Absorption of ultrashort intense lasers in laser–solid interactions*
Sheng Zheng-Minga),b),†, Weng Su-Minga), Yu Lu-Lea), Wang Wei-Minc), Cui Yun-Qianc), Chen Mina), Zhang Jiea)
Fig. 8. Selected electron trajectories along the target surface obtained from PIC simulation, which are typical for the betatron resonance acceleration. The inset shows the initial target density profile along the normal direction of the target surface. [ 114 ]