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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 1: Particle Sources and Radiofrequency 1

AKBP 1.6: Vortrag

Montag, 18. März 2019, 15:15–15:30, HS 8

Plasma Photocathode for Wakefield Acceleration — •Michael Stumpf, Severin Montag, and Georg Pretzler — Institut für Laser- und Plasmaphysik, Heinrich-Heine-Universität Düsseldorf

We present a newly developed setup for a plasma photocathode inside a wakefield acceleration structure that can be used in a Trojan Horse Injection scheme. The fs-laser based optical scheme provides precisely defined and modifiable electron bunch charges and volumes. Adaption to parameters required by the acceleration field is possible by exact control of the laser focus in intensity, size and 3D-shape. The modular, all-optical setup can be used in plasma and laser wakefield acceleration experiments. The injected charge has been simulated using different ionization models and is compared to experimentally obtained values. The agreement of those values also confirms the ultra-small initial spread of the electron bunch in time and space and the ultra-low transverse and longitudinal momenta. According to the Trojan Horse Injection scheme*, the electron bunch should keep low emittance in the nm rad regime after direct acceleration within a wakefield potential. *B. Hidding et al., Phys. Rev. Lett. 108, 034001 (2012)