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dipole

Paper Title Other Keywords Page
MOPPH064 A Project of SC ERL at KAERI sextupole, electron, emittance, undulator 160
 
  • Y. H. Han, Y. U. Jeong, B. C. Lee, S. H. Park
    KAERI, Daejon
  • S. V. Miginsky, A. V. Bondarenko
    BINP SB RAS, Novosibirsk
  A project of an ERL at Korea Atomic Energy Research Institute is described. The ERL will be connected to the existing machine without any modification. It consists of two 180° bents and two straight sections: one is for an FEL, another for a Compton X-ray source. One can choose the regime controlling the lenses. The total ERL is isochronous to avoid any problem with longitudinal beam instability. It will be possible to control both Sx and Sy transormation matrix elements independently to suppress longitudinal beam instability and allow the increase of beam current. Sextuples will be installed in bents to suppress chromatic aberration. This design provides operation in FEL regime with high electron efficiency in the range of electron energies 12–22 MeV.  
 
WEPPH038 Low Power Consuming Hybrid Bending Magnet at the XFEL Beam Dump electron, permanent-magnet, laser, radiation 435
 
  • H. Danared, A. Hedqvist, F. Hellberg
    MSL, Stockholm
  • W. Decking, B. Krause, A. Petrov, J. Pflueger, M. Schmitz
    DESY, Hamburg
  At the end of the European XFEL the electron beam is separated from the photon beam and directed towards the beam dump with a bending magnet.* This dipole magnet is designed to bend 10-25 GeV electrons by 1 degree/m and is 10 meter long in total. By integrating permanent magnet material into a conventional electromagnet, this so called hybrid magnet with a 1 T bias magnetic field consumes no power at the nominal energy of the XFEL, 17.5 GeV. The magnetic field can be increased or decreased by magnet coils to obtain 1 degree/m deflection for all energies between 10 and 25 GeV. In case of component failures a passive safety system is needed to prevent the electron beam from reaching the experimental hall. The bias field of the permanent magnet not only saves power, but also works as a safety system for the XFEL. Here a proposal for such a hybrid configuration is presented together with its characteristics. The magnet is designed to use small amount of permanent magnet material and to consume less power than a conventional electromagnet.

*European XFEL Technical design report, edited by M. Altarelli et. al.,DESY 2006.