Angular distributions of nonlinear Thomson scattering in combining field with a general elliptically polarized laser and a background magnetic field

TL;DR

This paper analyzes how elliptically polarized lasers and magnetic fields influence nonlinear Thomson scattering, revealing angular distribution symmetries and optimal conditions for high-brightness XUV and X-ray generation.

Contribution

It provides a comprehensive analysis of electron trajectories and radiation patterns in combined elliptically polarized laser and magnetic fields, identifying optimal parameters for high-quality XUV and X-ray production.

Findings

Angular distributions exhibit azimuthal symmetry regardless of parameters.

Polar angle distribution aligns with laser propagation as intensity increases.

Maximum radiated power and photon brightness depend on optimal angles and parameters.

Abstract

Nonlinear Thomson scattering of an electron motion in a combining field constituted by an elliptically polarized laser and a background magnetic field is investigated. The dependence of the electron trajectories, the fundamental frequency, the maximum radiation power in spatial distribution and corresponding spatial angle on ellipticity are obtained. In addition, we find that the angular distributions of scattering spectra with respect to the azimuthal angle exhibits the symmetry no matter what the order of harmonics, the laser intensity, the magnetic resonance parameter and the initial axial momentum are. Meanwhile, the polar angle distribution of the spectra approaches more and more the laser propagation direction with the laser intensity, the magnetic resonance parameter and the initial axial momentum. The maximum radiated power increases and the corresponding polar angle decreases. The optimal angle for the maximum radiated power per unit of solid, the corresponding photon number and the photons brightness can be obtained, which implies that the high quality XUV or/and x-ray can be generated by the studied scheme when the suitable parameters are chosen.