München 2019 – wissenschaftliches Programm
K 3.6: Vortrag
Dienstag, 19. März 2019, 15:40–16:00, HS 3
Long-term stability of the 200 TW ANGUS laser system — •Timo Eichner1, Cora Braun1, Björn Hubert1, Lars Hübner1,2, Sören Jalas1, Manuel Kirchen1, Vincent Leroux1, Phuoc-Thien Le1, Philipp Messner1, Jannis Neuhauss-Steinmetz1, Max Trunk1, Christian Werle1, Paul Winkler1,2, and Andreas R. Maier1 — 1Center for Free-Electron Laser Science and Department of Physics, University of Hamburg, Hamburg — 2Deutsches Elektronen-Synchrotron (DESY), Hamburg
Laser-plasma acceleration has developed into a technique providing high-energy electron beams as a driver for undulator-based X-ray sources. The LUX beamline, built in close collaboration of the University of Hamburg and DESY, is designed to be such a light source. The plasma acceleration stage is driven by the ANGUS laser, a Ti:Sapphire based system capable of producing 5J, 25fs pulses at a repetition rate of up to 5Hz. After significant in-house development, the laser has reached an operational stability, that enables us to repeatedly demonstrate 24-hour operation of the laser-plasma accelerator with several 10k consecutive electron beams and high availability. The electron beam quality is sufficient to drive a miniature undulator, generating undulator radiation at wavelengths below 4nm.
Integrating the laser into an accelerator-grade controls system, with several hundred online diagnostic channels, was a crucial step to achieve operational stability and day-to-day reproducibility. Here, we discuss the stability and control of spectral and temporal pulse properties in the context of 24-hour long experimental runs.