Göttingen 2025 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 2: Novel Accelerator Concepts I

AKBP 2.7: Vortrag

Dienstag, 1. April 2025, 15:30–15:45, ZHG004

Laser-plasma accelerator as injector for the cSTART storage ring — •David Squires, Alexander Saw, Nathan Ray, Joseph Natal, and Matthias Fuchs — IBPT, KIT, Karlsruhe, Germany

Laser-plasma accelerators (LPAs) are promising options for next-generation accelerator facilities. Accelerating structures on the millimeter scale and accelerating gradients several orders of magnitude higher than RF cavities suggest that LPAs can be used as compact accelerators that produce ultrashort pulses of high intensity electrons. We plan to develop an LPA-based injector for cSTART, a compact, high-acceptance storage ring to be built at the Karlsruhe Institute of Technology (KIT).

The LPA injector for our compact storage ring must produce electron beams with a comparatively low beam energy (50-90 MeV) for an LPA, have a narrow relative energy spread (4%), and a high shot-to-shot stability. Reaching these parameters is challenging and requires extensive simulation work before physical devices are built. In our study, we have used fbpic to simulate an ionization injection scheme in combination with tailored plasma density profiles to generate stable LPA beams. The density profile enables us to reach the desired beam energy and energy spread.

Keywords: Laser-Plasma Acceleration; Particle-in-cell Methods; Electron Injector; Controlled Particle Trapping