May 5 – 10, 2019
Europe/Berlin timezone

Effects of Beam Loading in LWFAs

May 6, 2019, 2:55 PM


Meštrovićevo šetalište 45 HR – 21000 Split Republic of Croatia


Johannes Götzfried (Ludwig Maximilian University)


We report on the generation of quasi-monoenergetic electron beams with up to 1.2nC charge, 18 pC/MeV spectral charge density and 1mrad rms divergence using shock-front injection in a 100-TW-class laser wakefield accelerator. These high charge densities result in significant beam loading which affects both the final energy and the spectral shape of the electron beam. We confirm and explain the observed influences using quasi-3D paricle-in-cell simulations. Modifying the shock-front or applying additional colliding pulse injection enables us to create two separate electron bunches serving as driver and witness to study beamloading effects on the trailing electron bunch [1].

[1] Wenz, J., et al. "Dual-energy electron beams from a compact laser-driven accelerator." Nature Photonics (2019): 1.

Working group Laser-driven electron acceleration

Primary authors

Johannes Götzfried (Ludwig Maximilian University) A. Döpp (Ludwig-Maximilians-Universität München; Max Planck Institut für Quantenoptik)


Hao Ding (LMU Munich) Max F. Gilljohann (Ludwig-Maximilians-Universität München) Mr Moritz Foerster (Ludwig-Maximilians-Universität München) Ms Sabine Schindler (Ludwig-Maximilians-Universität München) S. Karsch (Ludwig-Maximilians-Universität München; Max Planck Institut für Quantenoptik)

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