München 2019 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 10: New Accelerator Concepts

AKBP 10.1: Vortrag

Mittwoch, 20. März 2019, 11:00–11:15, HS 8

Stability analysis of Laser-Plasma accelerators using quasi-cylindrical PIC simulations — •Sören Jalas, Jannis Neuhaus-Steinmetz, Manuel Kirchen, and Andreas R. Maier — Center for Free-Electron Laser Science (CFEL) and Hamburg University

Particle-in-Cell (PIC) codes have proven to be a vital tool in the developement of plasma based accelerators. For example, the process of electron injection due to wave breaking and with that the beam charge and phase space is currently not quantitively described by analytical theories. Therefore, studies on the impact of fluctuating experimental parameters in this case lean on numerical simulations. For reliable quantitive results numerical convergence of these simulations is paramount. However, the computational demand of full 3D PIC simulations hinders extensive convergence and stability studies for many problems. The use of quasi-cylindrical PIC codes can greatly improve this by reducing the computational cost to that of a few 2D simulations. Here we present the results of extensive convergence and physical parameter studies of laser plasma accelerators using the quasi-cylindrical PIC code FBPIC. With the ultimate goal of using PIC codes for plasma accelerators just like tracking tools are used for conventional accelerators, we study the feasibility of wide range, high statistics parameter studies in terms of computational cost, when also quantitive precision is a key factor.