The main parameters of the Free-Electron Lasers

at the ELBE-Center for High-Power Radiation Sources

The electron beam of the radiation source ELBE is used to produce  intense, coherent and tunable electromagnetic radiation in the mid and far infrared region by means of two FEL oscillators (U27-FEL and U100-FEL) with the permanent magnet undulators U27 and U100.

Electron beam

Kinetic energy [MeV]

12 - 34

Bunch charge [pC]

77

Bunch repetition rate [MHz]

13

Average beam current [mA]

1

Long. beam emittance [keV*ps]

50

Transverse beam emittance [mm*mrad]

13

Undulators

Undulator

U27

U100

Undulator period [mm]

27.3

100

Number of periods

2*34

38

Undulator parameter

0.3 - 0.7

0.5 - 2.7

Optical resonators

Undulator

U27

U100

Type

open

partially waveguided

Resonator length [m]

11.53

Rayleigh range [m]

1

1.8

Diameter of the
outcoupling holes [mm]

1.5
2.0
3.0
4.0

2.0
4.5
7.0

Radiation

Undulator

U27

U100

 

Wavelength [μm]

4 - 22

18 - 250

details

Average
output power [W]

0.1 - 40

0.1 - 40

details

Pulse energy [μJ]

0.01 - 3

0.01 -3