Granularity effects in high-brightness electron beams

Abstract

Electron sources based on laser-cooling and trapping techniques are a relatively new reality in the field of charge particle accelerators. The dynamics of these sources are governed by stochastic effects, and not by the usually dominant space-charge forces. As the high-brightness field moves towards increasingly higher brightness, these stochastic effects will play an increasingly important role. In this presentation I will discuss the physics of these granularity effects and show their effect using molecular dynamics simulations with the GPT code where we track each and every particle in realistic fields and including all pair-wise interactions