Fritz-Haber-Institut der Max-Planck-Gesellschaft

FEL

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The FHI FEL

User experiments

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The electron beamline:

Electron pulses are accelerated in two normal conducting linear accelerators. The beamline is designed and constructed by Advanced Energy Systems.

ParameterUnitTarget
Electron energyMeV15-50
Energy spreadkeV<50
Charge per pulsepC>200
Micropulse lengthpsec1-10
Micropulse repetition rateGHz1
Macropulse lengthµs1-15
Macropulse repetition rateHz20

The undulator:

The undulator is is a permanent magnet, wedged pole undulator with a variable gap from STI Optronics.

TypePlanar hybrid
MaterialNdFeB
Period (mm)40
Length (m)2
Krms0.5 - 1.6

The emitted light:

Macro-pulse energies for narrow bandwidth conditions (< 1% relative full width at half maximum) at various electron energies

The data plotted as a function of the wavelength:

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