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Machine Parameter

FEL-1 project goals

Parameter   Units
Electron beam Energy 1.2 GeV
Bunch Charge 800 pC
Peak Current 850 A
Bunch Length (FWHM) 700 fs
Norm. Emittance (slice) 0.8-1.2 mm mrad
Energy Spread (slice) 150-250 keV
Wavelength 100 - 20 nm
Photon energy 12 - 62 eV
Tunability continuos  
Pulse Length (FWHM) 30 - 100 fs
Bandwidth (rms) ~ 20 - 40 meV
Bandwidth ΔE/E (rms) ~ 5 10-4  
Bandwidth fluctuations    
Polarization variable  
Repetition Rate 10 - 50 Hz
Energy/pulse > 100 µJ
Peak Power 1 ÷ 5 GW
Photons per pulse 1014 @100nm  
FEL mode TEM00  
Power Fluctuation ~ 25%  
Central Wavelength Fluctuation within bandwidth  
Output Transverse Position Fluctuation  50 µm
Pointing Fluctuation < 5 µrad
Output Spot Size (FWHM@waist) 290 µm
Divergence (rms) 50 @40nm µrad


Achieved values (*) so far

  Units
1-1.5 GeV
500-800 pC
300 - 800 A
600 - 1300 fs
1.2 - 1.5 mm mrad (estimated)
100 - 200 keV
100 - 20 nm (**)
12 - 62 eV
continuous on ranges (**)
30 - 100 fs (estimated)
22 @32 nm meV depending on λ
2.5 10-4 @32 nm  
~3% rms (@32 nm)
LO/LC/RC  
10 Hz
20 - 100 (*) µJ
0.2 - 1 (*) GW (estimateed)
~ 1013 @32 nm  
TEM00  
   
~ 1.1 meV
- µm
- µrad
- µm
- µrad

(*) Depending on wavelength.
Up to 2x higher by relaxing spectral purity,
(**) Tuning range continuous in selected regions, depending on seed laser.


(*) The FEL parameters for users beam time may differ from the ones indicated in this table. In the compilation of proposals, FEL users are addressed to the  FERMI FEL-1 and FEL-2 photon parameters.


FEL-2 project goals

Parameter   Units
Wavelength 20 - 4 nm
Photon energy 62 - 310 eV
Pulse Length < 100 fs
Bandwidth ~ 20 - 40 meV
Polarization variable  
Repetition Rate 50 Hz
Peak Power ~ 1 GW
Photons per pulse

 
1 · 1013 @10nm  
Power Fluctuation  > 50 %  
Central Wavelength Fluctuation within bandwidth  
Output Transverse Position Fluctuation  50 µm
Pointing Fluctuation < 5 µrad
Output Spot Size (FWHM@waist) 140 µm
Divergence (rms) 15 @10nm µrad

Achieved values (*) so far in commissioning

  Units
14.4 - 4* nm
86.1 - 310* eV
- fs
0.1 eV @10.8nm
Variable  
10 Hz
- GW
 3·1012 @10.8nm
3·1011 @6.5nm
2·1010 @4nm
 
 20% (@10.8 nm)  
~3 (rms @10.8 nm) pm
- µm
- µrad
- µm
- µrad

* Integer harmonics of the seed at 260 nm

Last Updated on Tuesday, 14 October 2014 16:48