Simulation of the Evolution of an Electron Bunch in a Vacuum Laser Photodiode

The main aim of this study is the development of a simulation model for determining electron bunch properties (emittance, size, and energy) after acceleration in the vacuum laser photodiode. An analysis of the information sources was carried out to find out the essential parameters that have an influence on the electron bunch properties. As a result, the model, considering the impact of the roughness of the photocathode surface and the electron temperature on the thermal emittance, was developed. In addition, the optimal design of the photocathode was determined.