Author: Molo, R.
Paper Title Page
WEPSO43 EEHG and Femtoslicing at DELTA 594
 
  • R. Molo, H. Huck, M. Huck, M. Höner, S. Khan, A. Schick, P. Ungelenk
    DELTA, Dortmund, Germany
 
  The ultrashort-pulse facility at DELTA (a 1.5-GeV synchrotron light source operated by the TU Dortmund University) based on the coherent harmonic generation (CHG) technique will be upgraded using echo-enabled harmonic generation (EEHG) in order to reach shorter wavelengths. A laser-induced energy modulation is employed in the CHG and EEHG schemes to create a periodic electron density modulation, but can also be used to generate ultrashort pulses of incoherent radiation at arbitrary wavelengths by transversely displacing the off-energy electrons(femtoslicing). A new storage-ring lattice for DELTA will be presented that not only offers enough free straight sections for an EEHG and femtoslicing setup, but also allows to operate both radiation sources simultaneously.  
 
WEPSO58 Status Report of the Short-pulse Facility at the Delta Storage Ring 642
 
  • A. Schick, H. Huck, M. Huck, M. Höner, S. Khan, R. Molo, P. Ungelenk
    DELTA, Dortmund, Germany
 
  Funding: * Work supported by DFG, BMBF and by the Federal State NRW.
At DELTA, a 1.5-GeV synchrotron light source operated by the TU Dortmund university, a short-pulse facility employing the CHG (Coherent Harmonic Generation) principle is in operation. Here, the interaction of an intense, ultrashort laser pulse and electrons in an undulator leads to microbunching of a small fraction of the electrons in the bunch. As a consequence, ultrashort, coherent synchrotron-radiation pulses in the VUV regime are emitted at harmonics of the incident laser wavelength. In addition, coherent THz pulses on the sub-ps timescale are generated. In this paper, the latest improvements of the facility and recent measurements are presented, including investigation of the transverse coherence and detection of the CHG radiation using photoemission spectroscopy in a VUV beamline.