Dresden 2017 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 1: New Accelerator Concepts I
AKBP 1.2: Vortrag
Montag, 20. März 2017, 15:15–15:30, MOL 213
Control and propagation effects of the wavefront quality for a high-power laser system — •Vincent Leroux1,2, Spencer W. Jolly1,2, Matthias Schnepp1, and Andreas R. Maier1 — 1Center for Free-Electron Laser Science & Department of Physics, University of Hamburg, 22761 Hamburg — 2ELI Beamlines, Dolní Břežany, Czech Republic
Laser-Plasma Wakefield Accelerators showed promising results in the past few years, generating high-energy electron beam over cm-distances. Nevertheless, the quality and shot-to-shot stability of such beams have not yet reached the level of conventional accelerators. One of the crucial factors is the driver laser beam quality, which needs to be focused close to the diffraction limit. To achieve the highest electron beam quality, the laser wavefront has to be controlled via a closed loop including a deformable mirror and a wavefront sensor. The LUX beamline, built in collaboration between ELI-Beamlines, the University of Hamburg and DESY, aims to generate and study plasma-driven undulator radiation. It is driven by the 200 TW ANGUS laser system which includes such adaptive optics. In this talk, I will present results on the wavefront control of the high power laser beam, including effects of the wavefront propagation through the 35 meters long transport beamline and wavefront-based alignment of the focusing parabolic mirror. The quality of the focal spot is investigated as the final figure of merit.