Use of Bremsstrahlung of a Linear Electron Accelerator for Processing Large Objects

The results of a numerical analysis of the dynamics of electrons in a beam injected into air with an energy of several tens of MeV and focused by the field of an accompanying electromagnetic radiation (EMR) wave at a full stopping distance are presented. The main feature is that the electrons travel the main part of the path in a radial focusing field, which provides beam transport. During the motion of an electron beam, multiple collisions occur between the particles of the beam and air molecules. As a result of these collisions, the radius of the electron beam increases. To determine the increase in the beam radius, the external fields under which the electron moves between two neighboring collisions should be taken into account. Since electrons collude with gas molecules randomly, the root-mean-square radial deviation of electrons from the accelerator axis was calculated. Transverse dimension of the electron beam and characteristics of the tracking field are considered. A twofold increase in the permissible root-mean-square deviation is shown to lead to a significant (by a factor of 16) decrease in the required microwave power of the tracking wave. A scheme for obtaining electron beams (and the corresponding bremsstrahlung flow) is theoretically substantiated.