The influence of the thermal electron velocities on forming the intensive high-convergence electron beams

The beam transmission in high-power linear-beam microwave tubes is defined in significant measure by presence of the transversal thermal electron velocities. That is because electron guns of those devices have low-beam perveance and very high beam-convergence. That influence is not taken into account in well-known calculation methods based on zero cathode electron velocity beam models. Therefore these calculations do not give reliable information on "thermal" beam and possible ways of suppression of electron "thermal" moving effects. The calculation method based on unification of the approaches, which are used by the electron-optical system (EOS) synthesis of the laminated beams and by the mathematical analysis of the characteristics of the nonlaminated beams with Maxwell initial electron velocities distribution, is more correct.