Free-Electron Lasers at the ELBE radiation source at the HZDR in Dresden-Rossendorf

FELBE is an acronym for the free-electron laser (FEL) at the Electron Linear accelerator with high Brilliance and Low Emittance (ELBE) located at the Forschungszentrum Dresden-Rossendorf, Germany. The heart of ELBE is a superconducting linear accelerator operating in cw mode with a pulse repetition rate of 13 MHz. The acceleration is performed in two superconducting units with 20 MV each. The average beam current is 1 mA. The electron beam is guided to several laboratories where secondary beams (particle and electromagnetic) are generated (→ details). Two free-electron lasers (U27-FEL and U100-FEL), produce coherent electromagnetic radiation in the mid and far infrared (4 - 250 µm). Pulse energies are in the few 100 nJ range with pulse duration of a few  picoseconds. The typical operation mode offers 13 MHz micropulse repetition rate, in macropulses of a few 100 μs at up to 25 Hz or, alternatively,  FEL operation in a continuous 13 MHz mode.

Applications for FEL beamtime are welcome!

                                                Next deadline: April 29th, 2013
                                                Informations can be found here.

The two free-electron lasers U27-FEL and U100-FEL with the undulators, U27 and U100, produce intense, coherent infrared radiation, which is tunable over a wide wavelength range by changing the electron energy or the undulator magnetic field.
(→ FEL description, → FELs worldwide)

The main parameters of the radiation produced by FELBE are  as follows:

Wavelength range 5 - 22 μm U27-FEL with undulator U27 18 - 250 μm U100-FEL with undulator U100 Pulse energy 0.01 - 2 μJ   depending on wavelength Pulse length 1 - 25 ps depending on wavelength Repetition rate 13 MHz 3 modes: - cw - macropulsed > 100 μs, < 25 Hz - single-pulse switched to kHz/Hz

FELBE was a member facility in the Integrated Infrastructure Initiative (I3) project "European Light Sources Activities - Synchrotrons and Free Electron Lasers" (ELISA) within the 7^th framework programme of the EU.and is presently involved in the initiative "wayforlight" for the implementation of a common access platform to all European synchrotons and FELs.

 

 

Here is more information about

• the undulators, the optical resonators, the lasing process, and the expected optical output power.

The infrared radiation is guided to a diagnostic station first and then delivered to six user laboratories. In some of the labs there are table-top femtosecond lasers, which are synchronized to the FEL pulses, thus providing the possibility of multi-color pump-probe experiments.

Here is more information about

• the user labs and the research using the FEL

• the optical transport line and the diagnostic system.

as well as

• the previous FEL publications.

Since 2007 the FELs are connected with the pulsed high-magnetic field laboratory.