2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/87502The expressions for wake fields, generated in plasma (in the plasma waveguide or unlimited plasma) by relativistic electron bunch, was received and analyzed for the cases of the presence and absence of strong external longitudinal magnetic field. For the both cases the comparative analysis of the dependence of field amplitudes on the parameters of the electron bunch was done.14 pages, ReVTeXAccelerator PhysicsPlasma Physicstext