Electron emission from the focus of the Gaussian pulse

Abstract

For a symmetric trajectory of an electron in the field of a Gaussian pulse, the parameters of radiation from a section in the vicinity of the focus are studied. It is shown that the modulus of velocity and modulus of acceleration are quasi-periodic, their maxima are separated in time. The radiation of an electron in the form of plane waves in the far zone is analyzed, and the intensity distribution over the solid angle is obtained. The radiation directivity diagrams are constructed, and the time profile of the radiation power is obtained. The difference from the dipole approximation is discussed. We consider the radiation of an electron that appears in the vicinity of the focus as a result of ionization.