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Drescher, M.

Paper Title Page
TU5RFP072 Status of the XUV Seeding Experiment at FLASH 1251
 
  • J. Bödewadt, A. Azima, F. Curbis, H. Delsim-Hashemi, M. Drescher, Th. Maltezopoulos, V. Miltchev, M. Mittenzwey, J. Roßbach, S. Schulz, R. Tarkeshian, M. Wieland
    Uni HH, Hamburg
  • S. Düsterer, J. Feldhaus, T. Laarmann, H. Schlarb
    DESY, Hamburg
  • R. Ischebeck
    PSI, Villigen
  • S. Khan
    DELTA, Dortmund
  • A. Meseck
    BESSY GmbH, Berlin
 
 

Funding: This work is supported by the Bundesministerium für Bildung und Forschung under contract 05 ES7GU1


A seeded free-electron laser operating in the soft X-ray (XUV) spectral range will be added to the SASE FEL facility FLASH. For this purpose, a 40 m long section upstream of the existing SASE undulator will be rebuilt during the shutdown in fall 2009. This includes the injection of the seed beam into a new 10 m variable-gap undulator, the out-coupling of the seeded FEL radiation and all diagnostics for photon- and electron beams. The XUV seed pulse is generated by high harmonics (HHG) from a near-infrared laser, optically synchronized with FLASH. After amplification within the undulators the XUV light will be guided towards diagnostic stations. Besides a proof-of-principle demonstration for seeding at short wavelength the purpose of this development is to provide future pump-probe experiments with a more stable FEL source in terms of spectral properties and timing.