Intensity and pulse shape effect on the spectra and the angular distribution of nonlinear Thomson scattering

Summary form only given. Nonlinear Thomson scattering of intense laser radiation has been studied theoretically, which predicts generation of radiation at the harmonics of the laser frequency. We perform a preliminary set of numerical simulation on the radiation properties of a free electron in a strong laser field using realistic laser fields, concentrating on the spectral and angular distribution of the harmonics. We show that the spectra and the radiation pattern of nonlinear Thomson scattering are dependent on the laser pulse shape and intensity, an effect important for interpreting relevant experimental results. Future investigation should include effects of the electron initial position and velocity distribution to elucidate the effect at a macroscopic level.