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 .
 Wenz, J., et al. "Dual-energy electron beams from a compact laser-driven accelerator." Nature Photonics (2019): 1.
|Working group||Laser-driven electron acceleration|