Direct electron acceleration by chirped laser pulse in a cylindrical plasma channel
Hu Yong-Nan1, Cheng Li-Hong2, Yao Zheng-Wei1, Zhang Xiao-Bo1, Zhang Ai-Xia1, Xue Ju-Kui1, †
       

Contour plot of γmax in (a0, ωp0) plane with different chirped laser pulses [linearly chirped laser pulse (the first row), exponential chirped laser pulse (the second row), Gaussian chirped laser pulse (the third row), and sinusoidal chirped laser pulse (the fourth row)]. Initially, the electron is at rest, but it is slightly displaced from the x and y axes of the plasma channel.