Author: Seidel, W.
Paper Title Page
MOPPR016 Femtosecond Level Electron Bunch Diagnostic at Quasi – CW SRF Accelerators: Test Facility ELBE 810
  • M. Gensch, C. Kaya, U. Lehnert, P. Michel, Ch. Schneider, W. Seidel
    HZDR, Dresden, Germany
  • G. Geloni
    European XFEL GmbH, Hamburg, Germany
  • M. Helm
    FZD, Dresden, Germany
  • H. Schlarb, A. Shemmary, N. Stojanovic
    DESY, Hamburg, Germany
  Funding: BMBF through the PIDID proposal and HGF through the ARD initiative
At the srf based prototype cw accelerator ELBE a new electron beamline, providing for femtosecond electron bunches with nC bunch charges and repetition rates in the 1 – 200 KHz regime and with pC bunch charge and repetition rates of 13 MHz is currently constructed. The 40 MeV electrons will be used in photon-electron interaction experiments with TW and PW class laser and the generation of broad band and narrow bandwidth coherent THz pulses. In this paper we outline ideas for novel online diagnostics of the electron bunch properties (e.g. arrival time and bunch form) based on the time and frequency domain analysis of the emitted coherent THz radiation but also based on direct measurements by e.g. electro-optic sampling. The suitability of ELBE as a testbed for diagnostic of future cw X-ray photon sources (e.g. energy recovery linacs) will be discussed.
TUPPP087 Commissioning of the Fritz Haber Institute Mid-IR FEL 1792
  • A.M.M. Todd, H. Bluem, D. Dowell, R. Lange, J.H. Park, J. Rathke, L.M. Young
    AES, Medford, NY, USA
  • W. Erlebach, S. Gewinner, H. Junkes, A. Liedke, G. Meijer, W. Schöllkopf, W.Q. Zhang, G. von Helden
    FHI, Berlin, Germany
  • S.C. Gottschalk
    STI, Washington, USA
  • K. Jordan
    Kevin Jordan PE, Newport News, Virginia, USA
  • U. Lehnert, P. Michel, W. Seidel
    HZDR, Dresden, Germany
  • R. Wünsch
    FZD, Dresden, Germany
  The IR and THz FEL at the Fritz Haber Institute (FHI) in Berlin is designed to deliver radiation from 4 to 400 microns. A single-plane-focusing undulator combined with a 5.4-m-long cavity is used is the mid-IR (< 50 micron), while a two-plane-focusing undulator in combination with a 7.2-m-long cavity with a 1-D waveguide for the optical mode is planned for the far-IR. Beam was delivered to the IR beam dump in November 2011. We describe progress since that time in completing the commissioning of the mid-IR beamline and the status of the far-IR beamline design and fabrication.