The FL24 beamline is an open port variable micro-focus beamline optimized for the 'water-window' and operable for the full wavelengths range at FLASH2 with its variable-gap undulators.
Acceptance of the full FLASH2 parameter range:
- Number of Bunches per second 1 – 8000 (delivered up to 5000)
- Pulse Repetition Rates (within pulse train) 40.50.100.200.250.500.1000 kHz
- Pulse Duration (FWHM) 10 – 300 fs (+single spike SASE option)
- 3rd Harmonic Wavelength down to 1.7 nm
- 3rd Harmonic Pulse Energy typically 0.5% of fundamental
- Wavelength 3.5
– 90 nm
- Photon beam Energy 13.7 – 343 eV
- Average Pulse Energy (single bunch) 0.5 – 500 µJ
- Average Pulse Energy (pulse trains) 0.5 – 500 µJ
Photon-diagnostics of FLASH2:
- Gas monitor photon beam energy detection
- Online photoionization spectrometer [OPIS] for wavelength documentation
Open port focused option FL24a description:
Focusing optical element is a bending mirror system with vertical pre-mirror [KAOS by Fermi@Elettra]
The FLASH2 optical laser will be available con-focal from 2019.
Open port focused option FL24a parameter:
- Beam height 1705 mm
- Focal length 2000 (standard) - 6000 mm [from KAOS horizontal]
- Actual position 392- 4392 mm from 'open port'
- Distance to source 90.55 - 115m
- Focal length with FLASH2 optical laser 2000 - 3000 mm [from KAOS horizontal]
- Last beam defining aperture 16 mm in diameter
Open port unfocused option FL24b description:
Open port unfocused option FL24b parameter:
- Beam height 1600 mm
- Last beam defining aperture 16 mm in diameter