Fig. 1. Schematic of the channel target. Laser pulse injects coaxially to pre-plasma filled channel target

Fig. 2. Electron number density and electron spectral distribution

Fig. 3. Statistics of electron beam angle distribution

Fig. 4. Statistics of work done by the electric field on the electron beam

Fig. 5. Statistics of electron beam charge

Fig. 6. Statistics of electron beams in the channel under different filling plasma densities at t=480 fs 时刻不同填充等离子体密度下通道内电子束统计