Free-electron laser at the Electron Linear accelerator with high Brilliance and Low Emittance
ELBE is a world-wide unique instrument providing a compact, accelerator-driven photon and particle source. The variety of secondary radiation being offered extends from high-energy gamma rays, to infrared and THz radiation, to neutron, positron and electron beams.
ELBE is operated as user facility, providing more than 50% of the beamtime to external user groups.
The core of the ELBE Center for High-Power Radiation Sources is the 40 MeV superconducting electron accelerator ELBE (Electron Linear accelerator with high Brilliance and low Emittance), generating a variety of secondary radiations like MeV Bremsstrahlung, neutrons and positrons and feeding two free electron lasers (called FELBE) with wavelength ranges from 4µm - 25µm and 20µm - 250 µm, respectively.
These are the only FELs in Europe open to users providing a continuous pulse train (cw mode) at MHz repetition rate (13 MHz). In addition two beamlines are providing high-power coherent terahertz radiation between 0.1 and 3 THz at 100 kHz repetition rate (TELBE). Roughly 40% of the total beamtime is given to the IR and THz beams. The average power of FELBE is in the range of tens of Watts, corresponding to pulse energies of a few µJ and peak powers of the order of 1 MW. The pulse duration depends strongly on the wavelength and ranges from sub-ps to several tens of ps. FELBE can be operated in cw mode, in a macrobunch (burst) mode or with a reduced 1 kHz repetition rate achieved using a semiconductor plasma switch.
The combination of FELBE and the Dresden High Magnetic Field Laboratory (HLD) enables worldwide unique experiments with an FEL in a pulsed magnetic field of up to 70 T (in 100+ ms pulses).
Calls for proposals are published twice per year in spring an in fall, with granted beamtimes being scheduled in the subsequent term.
User access to the ELBE - Center for High-power Radiation Sources is managed in line with the recommendations of the European Charter for Access to Research Infrastructures. It is quality-based and relies on a peer-review procedure based on research proposals. The primary selection criterion is scientific excellence. Among scientifically equally ranked proposals priority is given to users from countries without national FEL and from EU-13 states, to PhD students and to women PIs. Calls for proposals are published twice per year, proposals are submitted electronically using the portal GATE.
ELBE as a whole is operated 24 h, 7 days/week, beamtime is granted in units of 12 hours from 6:00 to 18:00 and from 18:00 to 6:00 respectively.