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P: Fachverband Plasmaphysik

P 11: Laser plasma and laser applications 1

P 11.5: Vortrag

Mittwoch, 11. März 2020, 12:15–12:30, b302

Multi-Parameter-Controlled Laser Ionization of Gases in the Tunnel Ionization Regime — •Michael Stumpf and Georg Pretzler — Institut für Laser- und Plasmaphysik, Heinrich-Heine-Universität Düsseldorf

Within the scope of developing a Plasma Photocathode for Wakefield Acceleration of electrons we present a novel optical setup to ionize gases with controlled and modifiable ionization volume, number of electrons and initial energy. The reflection-based setup, called AMBER (Axicon Mirror Beam ExpandeR), allows the implementation into a fs-laser beamline without disturbing the spectral phase of the laser pulse. By changing the beam profile, pulse duration and pulse energy of the laser a desired ionization volume and state can be achieved. The dedicated simulations with different ionization models are in good agreement with the gained experimental results which allows a precise prediction of laser-gas interactions. The setup will be used to realize the Trojan Horse Injection model at the FLASHForward facility at DESY in Hamburg.