Wuppertal 2015 – scientific programme
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 11: PWA / TNSA III
AKBP 11.1: Talk
Wednesday, March 11, 2015, 16:45–17:00, F.10.01 (HS 4)
Adiabatic Matching at the External Injection Experiment at REGAE — •Irene Dornmair1,2, Klaus Floettmann3, Florian Grüner1,2, Andreas R. Maier1,2, and Benno Zeitler1,2 — 1Universität Hamburg, Institut für Experimentalphysik, 22761 Hamburg — 2CFEL, Center for Free-Electron Laser Science, 22607 Hamburg — 3DESY, 22607 Hamburg
Laser Plasma Accelerators provide very high accelerating gradients, but also strong focusing fields. Within the LAOLA Collaboration, the University of Hamburg and DESY work closely together to combine university research in the field of laser-plasma acceleration with the expertise of a large and well-established accelerator facility.
Externally injecting an electron bunch from a conventional gun into a laser driven plasma wakefield is a promising path towards increased control over the injected electron phase space. To prevent emittance growth, the beam size needs to be matched to the focusing forces present in the wakefield. This matched beam size is very small, which requires very strong focusing optics, both for injection and for beam capturing after the plasma. We show how the requirements on the beam optics can be relaxed by introducing tapered matching sections in the plasma target where the focusing is slowly, thus adiabatically, changed.