Author: Schneider, C.M.
Paper Title Page
WEPWA005 Experimental Characterization of the Coherent Harmonic Generation Source at the DELTA Storage Ring 2132
  • M. Huck, H. Huck, M. Höner, S. Khan, R. Molo, A. Schick, P. Ungelenk
    DELTA, Dortmund, Germany
  • S. Cramm, L. Plucinski, C.M. Schneider
    Forschungszentrum Jülich, Peter-Gruenberg-Institut-6, Jülich, Germany
  • S. Döring, L. Plucinski, C.M. Schneider
    Universität Duisburg-Essen, Duisburg, Germany
  Funding: Work supported by DFG, BMBF, and by the Federal State NRW.
The short-pulse facility at the 1.5-GeV synchrotron light source DELTA, operated by the TU Dortmund University, generates coherent VUV and THz radiation by Coherent Harmonic Generation (CHG). Here, a femtosecond laser pulse interacts with an electron bunch in an undulator causing a periodic energy modulation and subsequent micro-bunching, which gives rise to coherent radiation at harmonics of the seed wavelength. Rather than using Ti:Sapphire laser pulses at 795 nm directly, the second harmonic is employed for seeding since 2012. After significant modifications of the seed laser beamline and the dispersive chicane to improve the microbunching, the last commissioning steps include characterization of the CHG radiation and preparing the experimental setup at an existing VUV beamline for time-resolved photoemission spectroscopy. In this paper, the status of the project and recent experimental results are presented.