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Parameter tables


FEL-1
wavelength
Pulse energy at source
in circular polarization
Bandwidth
(FWHM)
Pulse duration
(FWHM)
Beamline transmission
(without filters)
> 26 nm 50-150 μJ ~ 0.1-0.15 % 30-80 fs 60-10 %
20-26 nm 20-50 μJ ~ 0.1 % ~ 40 fs ~ 60 %
17-20 nm 10-20 μJ ~ 0.1 % ~ 40 fs ~ 60 %

 



FEL-2
wavelength
Pulse energy at source
in circular polarization
Bandwidth
(FWHM)
Pulse duration
(FWHM)
Beamline transmission
(without filters)
10-20 nm 10-30 μJ ~ 0.1 % ~ 30 fs ~ 70 %
6-10 nm 5-10 μJ ~ 0.1 % ~ 25 fs 20-70 %
5-6 nm ~ 5 μJ ~ 0.1 % ~20 fs 20-40 %
4-5 nm 3-5 μJ ~ 0.1 % ~ 20 fs 10-25 %

 


  • In linear polarization the FEL energy per pulse at the source is reduced by about a factor 2; further information can be found here.
  • It is not possible to use both FEL-1 and FEL-2 sources during the same beamtime, nor to use the full wavelength range of a given FEL source; further information can be found here.
  • FEL performance requests exceeding the standard conditions may affect the risk evaluation, a preliminary discussion with the FERMI staff is recommended.
  • Special configurations (double wavelengths, double pulses, etc.) are available; further information can be found here. Their request may affect the risk evaluation, a preliminary discussion with the FERMI staff is recommended.
  • Filters are required to remove unwanted radiation (seed laser, FEL harmonics, etc.); typical filter transmissions are shown here.
  • The maximum beamline transmission requires using optimal mirror coatings. Their selection must be discussed with the beamline coordinators, being multiple coatings available; further information can be found here.
  • The TIMER beamline has a special photon transport with different transmission values.
  • The MagneDyn beamline is available only on FEL2.
  • A split-and-delay device (AC/DC) is available at the TIMEX, DiProI and LDM beamlines. When this device is used, the beamline transmission is reduced; further information can be found here.
  • All experimental end-stations are equipped with an optical laser for pump-probe; further information can be found here.

Pease contact fermi.usersupport@elettra.eu for additional info or special requirements.

Last Updated on Tuesday, 18 February 2020 15:47