Electron beam modulation and leakage currents during self-sustaining secondary emission in magnetron guns

Problems of magnetic insulation violation inside a vacuum coaxial diode with dense electron flow are considered from the point of view of the development as low-voltage as high-efficiency relativistic magnetrons with secondary emission cathode. The numerical model of nonstationary nonuniform secondary electron emission from a cathode was developed. The results of computer simulations of an electron clouds formation due to nonlinear azimuthal instability under the condition of strong nonuniform secondary self-sustaining emission are described.