Particle-in-Cell Simulations of an Electron Gun Model using CST

Hiwi Stelle, Projektseminar


Predictions of particle dynamics in the initial phase of an accelerator requires the full set of Maxwell's equations to be solved alongside the particle motion. The natural choice for a self-consistent simulation is the Particle-in-Cell (PIC) method.

The goal of this work is to provide reference solutions for some of our in-house codes. The modeling in these codes aims for performance improvements over the PIC method while making simplifying assumptions on the physics involved. In this work, a simplified model of an electrostatic electron gun is to be simulated using the Dassault Systèmes CST particle solver. The model will incorporate key features of a gun while reducing the computational cost compared to a real-case scenario. Simulation studies will determine the performance and scalability of the solver used. If time and the number of students permit, the comparison to the in-house codes will be done as well.

The students will gain significant knowledge about the usage of commercial simulation tools. Additionally, insights into the working principle of particle accelerators can be gained.

Anticipated milestones:

Gaining knowledge about the particle-in-cell method and it's usage in CST as well as some background on electron guns.

Creation of a simplified gun model.

Simulation runs determining particle dynamics, bunch parameters and solver performance.

(depending on time / # students: comparison to in-house codes in terms of performance, scalability and precision)


Interest in learning commercial tools and the numerical schemes behind them, especially the CST studio suite. Interest in particle accelerators is beneficial. Feel free to pass by Jonas Christ for more details.