Dortmund 2021 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 4: New Accelerator Concepts and Hadron Accelerators

AKBP 4.2: Vortrag

Dienstag, 16. März 2021, 16:45–17:00, AKBPa

Bayesian optimization of a laser-plasma accelerator — •Soeren Jalas¹, Manuel Kirchen¹, Laurids Jeppe¹, and Andreas R. Maier² — ¹Center for Free-Electron Laser Science and Department of Physics Universität Hamburg — ²Deutsches Elektronen Synchrotron (DESY)

Generating high-quality laser-plasma accelerated electron beams requires carefully balancing a plethora of physical effects and is therefore challenging * both conceptually and in experiments. Here, we use Bayesian optimization of key laser and plasma parameters to flatten the longitudinal phase space of an ionization-injected electron bunch via optimal beam loading. We first study the concept with particle-in-cell simulations and then demonstrate it in experiments. Starting from an arbitrary set-point the plasma accelerator autonomously tunes the beam energy spread to the sub-percent level at 254 MeV and 4.7 pC/MeV spectral density. Finally, we study a robust regime, which improves the stability of the laser-plasma accelerator and delivers sub-5-percent rms energy spread beams for 90% of all shots.