Generating A Tunable Narrow Electron Beam Comb via Laser-Driven Plasma Grating

The simulation of the scheme is performed using 2D3V Particle-in-Cell (PIC) method with the LAPINE code. The simulation involves two circularly polarized (CP) laser pulses, with the same strength parameter , wavelength , spot radius , and pulse duration. At t=0, the two CP laser pulses intersect on the left side (z=0) of plasma target at an angle 10°. The peak intensity of the laser is 8.56 ×10^18 W/cm2. The plasma target consists of a uniform subcritical density plasma layer with a density of n_0=0.1n_c and a thickness of 15μm . The plasma layer is located in 8μm<z<18μm. The simulation box is 40μm*25μm, containing a 8000*5000 grid, with 16 ions and 16 electrons per cell. The ion-electron mass ratio is 1836.The columns of this dataset represent the z-direction information under this simulation parameter, while the rows represent the y-direction information. It can be processed by MATLAB.