The Optimization of the Electron Injector Resonant System Based on the Evanescent Oscillations

The methods and results of the bunching system optimization in the compact S - band electron injector are presented in the report. The injector consists of the low-voltage diode electron gun and bunching system based on the resonant system with the evanescent oscillations. In the bunching system such field distribution along the axis is realized, that its amplitude increases from the point of injection of electrons to the exit. The optimized resonance system allows to obtain the electron bunches with the phase length less than 10° (for 70 % particles) at the injector exit.