Beamtypes of ELBE

Radiation Sources

Various kinds of secondary radiation can be generated by the primary electron beam from ELBE.

  • Free-Electron Laser (FELBE)
    In the optical laboratories coherent electromagnetic radiation in the wavelength between 4-250 µm is available from two Free-Electron-Lasers, see FELBE pages for further information.
    In addition, the FEL beam can be directed to the neighbouring High Magnetic Field Laboratory, offering the unique possibility to carry out magneto-optic experiments in pulsed high magnetic fields.
  • Bremsstrahlung (γELBE)
    Bremsstrahlung (up to 20 MeV) is available in the nuclear physics cave. Polarized radiation can also be provided.The time structure of the Bremsstrahlung radiation is defined by the electron beam which has to be operated in the micropulse mode. The interval between the pulses can vary between  77 ns and 1000 ns. 
  • Electrons
    The direct electron beam from ELBE can be used for detector tests and for irradition.
    Detector tests with an extremly high time resolution are enabled by electron bunches containing only one electron thereby maintaining the time structure of the beam on the ps time-scale.
    For radiobiological experiments the electrons can be extracted on air. A cell-laboratory located close to the radiation physics cave can also be made available to external users.
  • Neutrons (nELBE)
    nELBE is a neutron time-of-flight system with neutron energies between 100 keV and 10 MeV.
  • Positrons (pELBE)
    Materials research with positrons can be performed at EPOS, which consists of three subsystems for mono-energetic positron spectroscopy (MePS), gamma-induced positron spectroscopy (GiPS) and conventional positron spectroscopy using β+ radiation.
  • Superradiant THz source (TELBE)
    This new facility provides low-frequency, high-field THz pulses, in combination with a variety of table-top light sources based on femtosecond lasers. It covers the lower THz range between 0.1 and 3 THz with pulse energies up to 100 µJ. Pulses from TELBE are carrier-envelope-phase stable and can be provided at flexible repetition rates between a few tens of Hz to eventually 13 MHz. The frequency bandwidth can be either 100%, utilizing the diffraction radiator source, or ~20%, utilizing an 8-period undulator.

Time structure of the electron beam from ELBE

The time structure of the electron beam from ELBE is transferred to the secondary radiation. It can be adjusted according to the requests of the user and ranges from cw operation to macropulse mode and to single pulses.

 
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