Simulation of x-ray generation by betatron oscillation in a laser-plasma based accelerator

The injection of an ultra-intense femtosecond laser pulse or a strong electron beam into a plasma generates a laser or a plasma wake field which can be used for electron acceleration with a strong acceleration gradient. It was observed that the off-axis injection of the electron beam in a laser or plasma wake field generates betatron oscillation. From the betatron oscillation, X-ray radiation was detected. The two-dimensional simulation results for the betatron oscillation of the electron beam are reported as well as the investigation of radiation properties. Besides, The simulations for femtosecond X-ray generation from Compton back-scattering interaction between electron beam and a laser are presented.