MOB —  Monday - Late Morning   (26-Aug-19   12:00—13:00)
Chair: S. Schreiber, DESY, Hamburg, Germany
Paper Title Page
Operation Status and Future Perspective of Warm XFEL  
  • H. Tanaka
    RIKEN SPring-8 Center, Sayo-cho, Sayo-gun, Hyogo, Japan
  The world first XFEL facility, LCLS adopted a warm (normal conducting) S-band RF technology to constantly provide high quality electron beams with high energy for generating stable SASE-based XFELs. Following the success of LCLS, SACLA, PAL-XFEL and SwissFEL based on the warm RF technologies of S- or C-bands were constructed and have started their user operations or test experiments via the beam-commissioning phase. These warm XFEL facilities have developed various advanced FEL schemes making high performance XFELs available for user experiments. They have been continuously upgrading the operations for expanding experimental opportunities and potentiality. This talk will overview the current operational status of warm XFEL facilities and present future perspectives compared with cold (super-conducting) XFEL facilities.  
slides icon Slides MOB01 [19.294 MB]  
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Overview on Future Continuous Wave X-Ray Free Electron Lasers  
  • H. Weise
    DESY, Hamburg, Germany
  FELs based on superconducting accelerators offer a photon beam time structure being flexible in pulse pattern, with the electron bunch properties tailored to effectively meet user requirements. While DESY’s long time operated FLASH facility as well as the in 2017 commissioned European XFEL in the Hamburg region, Germany, are operated in pulsed mode with bunch trains of up to 600 µs and bunch repetition rates of up to 4.5 MHz, new facilities aim for continuous wave (cw) RF operation allowing bunch repetition rates of typically 100 kHz to 1 MHz. The used accelerator modules are still using the so-called TESLA technology. Minor but essential modifications in the accelerating structure design bring the cryogenic load to a reasonable and acceptable level. The upcoming LCLS-II, being under construction at SLAC, U.S., uses so-called Nitrogen doped accelerating structures. The recently started SHINE project at Shanghai, China, will adopt similar ideas. For a possible European XFEL upgrade towards cw, also so-called large grain Niobium is an option. The presentation will give an overview about R&D towards the great future of X-ray FELs. Activities in all three regions will be described.  
slides icon Slides MOB02 [12.308 MB]  
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