Angular Distributions of Thomson Scattering in Combined Laser and Magnetic fields

TL;DR

This study investigates the angular distribution of Thomson scattering in combined laser and magnetic fields, revealing symmetry properties and potential for X-ray generation with specific parameter choices.

Contribution

It provides detailed analysis of angular distributions and electron trajectories in combined fields, highlighting conditions for X-ray frequency generation.

Findings

Angular distributions show twofold symmetry regardless of parameters.

Radiation is mainly distributed near the laser propagation direction.

High-frequency X-ray radiation can be achieved with suitable parameters.

Abstract

Angular distributions of Thomson scattering are researched in the combined fields with a circularly polarization of laser field and a strong uniform magnetic field. The trajectories of the electron and the dependence of it on the initial phase are also given. It is found that the angular distributions with respect to the azimuthal angle show twofold symmetry whatever the laser intensity, the order of harmonics, the resonance parameter, and the initial axial momentum are. On the other hand, the radiation with respect to the polar angle is mainly distributed in two regions which are roughly symmetric of the laser propagation. In addition, the larger the laser intensity, the resonance parameters, the initial axial momentum are, the closer radiation is to the laser propagation direction. Besides, a new possibility of X-ray production is indicated. That is to say, with appropriate choice of laser and electron parameters, the high frequency part of the Thomson scattering radiation can reach the frequency range of X-ray (10^17 Hz - 10^18 Hz).