MC2: Photon Sources and Electron Accelerators
A06 Free Electron Lasers
Paper Title Page
Review of Attosecond Free Electron Lasers  
  • S. Li
    SLAC, Menlo Park, California, USA
  Attosecond free electrons are now becoming a reality. A review of the advances, different methods and schemes will be presented. Needs from users and progress in various FEL facilities world-wide are discussed. Requirements for futher progress in schemes and technology are reviewed.  
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First results of the Hard X-Ray Self-Seeding Commissioning at the European XFEL  
  • S. Liu, W. Decking, L. Fröhlich, N. Golubeva, M.W. Guetg, R. Kammering, V. Kocharyan, E. Negodin, E. Saldin, T. Wohlenberg
    DESY, Hamburg, Germany
  • S. Abeghyan, G. Geloni, J. Grünert, S.K. Karabekyan, A. Koch, N.G. Kujala, D. La Civita, A. Rodriguez-Fernandez, L. Samoylova, S. Serkez, R.A. Shayduk, H. Sinn, V. Sleziona, T. Tanikawa, S. Tomin, M. Vannoni, M. Yakopov
    EuXFEL, Schenefeld, Germany
  • J.W.J. Anton, S.P. Kearney, D. Shu
    ANL, Lemont, Illinois, USA
  • V.D. Blank, S. Terentiev
    TISNCM, Troitsk, Russia
  • P. Rauer
    University of Hamburg, Institut für Experimentalphysik, Hamburg, Germany
  At the Euorpean XFEL, a Hard X-Ray Self-Seeding (HXRSS) setup with two chicanes was installed in one of the two Hard X-Ray beamlines (SASE2). With the help of the two-stage scheme, HXRSS at the European XFEL will benefit from an increased signal-to-noise ratio, which can be used to cope, for the first time, with high-repetition rate X-ray pulses within a bunch train. This also allows for unprecedented output characteristics*. Commissioning of this setup has been started in Sept. 2019. In this paper, we will present the first commissioning results and our future plans.
*S. Liu et al., Phys. Rev. Accel. Beams 22, 060704 (2019).
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Experiments with Coherent Pulses at FERMI  
  • L. Giannessi, E. Allaria, F. Bencivenga, G. De Ninno, C. Masciovecchio, G. Penco
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  Starting from 2019 FERMI has started the full user operations with more than 50% of the machine time dedicated to user’s experiments. Proposals are now received through two calls occurring every year in December and June. Thanks to an optimization of the beamtime allocation the oversubscription has been kept of the order of 1 to 3.5 despite the increase of received proposals. We report here about the latest results from the FERMI FELs focusing on those experiments that exploits the unique capabilities of FERMI of producing fully coherent pulses.  
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