Spatial radiation features of Thomson scattering from electron in circularly polarized tightly focused laser beams

Abstract

Abstract Within the frame of electrodynamic and nonlinearly Thomson scattering, we study the motion and spatial radiation features of a static electron irradiated by circularly polarized tightly focused laser with different laser intensities. Combining the existing <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mfenced close=")" open="("> <mml:mrow> <mml:mi>φ</mml:mi> <mml:mo>,</mml:mo> <mml:mi>θ</mml:mi> </mml:mrow> </mml:mfenced> </mml:math> and our novel 3D Oxyz coordinate analysis, we find the azimuthal divergence and peak radiation azimuth decrease at varied speeds with laser intensity increasing, whereas both the total radiated power and motion intensity expand tremendously. Furthermore, the relation between angular radiation and electron’s motion is illustrated by investigating the evolvement of radiation’s 2D spectrum and 3D shape. Eventually, by means of separating the motion into two parts, similarities between the trajectory of the later part and Oxyz radiation image provide insights into the spatial coupling and decoupling process in angular radiation.