Beamlines FL11 & FL12 (former BL3 and BL1, FLASH1)

The FLASH1 experimental floor has a size of 20 m x 30 m shared among the Beamlines FL11 to FL15. Beamline FL12 (former BL1)  has Kirkpatrick-Beaz (KB) focusing optics and the permanently installed multi-purpose chamber CAMP.  The former beamline BL2 featured a ~20 μm (FWHM) focal spot produced by an ellipsoidal mirror or an unfocused beam and incorporated a spilt-and-delay unit for XUV-XUV pump-probe experiments. In the unfocused setup nickel coatings allowed user experiments down to ~4.2 nm in the FEL fundamental. Beamline BL3 features a ~20 μm (FWHM) focal spot produced by an ellipsoidal mirror or an unfocused beam and allows a combination of XUV pulses with THz pulses from the THz beamline for pump-probe experiments. BL3 will soon be replaced by our new beamline FL11, which is at at the end of its design phase (Dec. 2025). FL11 will be optimised towards higher FEL energies and equipped with a state-of-the-art bendable KB system, similar to FL24 and FL23. It will provide improved conditions for pump-probe experiments using the complementary accelerator-generated THz radiation and/or the new FLASH1 pump-probe laser (just being set up).

FL12 (former BL1) - CAMP@FLASH - An End-Station for Imaging, Electron- and Ion-Spectroscopy, and Pump-Probe Experiments

  • more detailed information on the CAMP end-station
  • Non-monochromatic FEL photons
  • Nickel-coated Kirkpatrick-Baez (KB) focusing optics providing an FEL focal spot of ~7μm x 8μm (FWHM, hor/ver) over the full wavelength range of FLASH1
  • Modular layout allowing combinations of large-area, single-photon counting pnCCD photon-detectors with VMI- and COLTRIMS-type electron- and ion-spectrometers, and ports for various user provided gas jets, particle injectors and fixed target holders
  • Multilayer based split-and-delay unit for XUV pump -XUV probe experiments (-30ps to +650ps, @13.57nm)
  • Photon diagnostics and beam manipulation tools: GMD intensity monitors, beam position monitors, in-line varied-line spacing (VLS) wavelength spectrometer, sets of filters and apertures, gas absorber, fast shutter
  • After the shutdown in 2024-2025, FL12 will initially not be operable with an optical pump-probe laser. A high-power optical pump-probe laser for FLASH1 beamlines FL11 and FL12 will be built after accomplishing the seeded FEL and its delivery.


CONTACT FL12 (former BL1):

Erk
Benjamin Erk
E-Mail: Benjamin Erk
Phone: +49 (0)40 8998 (9)6237
Location: 49 / 112

BL2 has been disassembled in autumn 2020 and is no longer available !
 

BL3 (soon to be replaced by FL11) - 3m x 4m footprint for user-provided endstation, THz-XUV Pump -probe available

  • non-monochromatic FEL photons, spectral range >4.5 nm (carbon coated optics)
  • focused to ~20 μm or unfocussed beam size ~5-10 mm (FWHM, depending on wavelength)
  • optional pump-probe experiments using the FLASH1 optical pump-probe laser systems
  • photon diagnostics and beam manipulation tools: GMD intensity monitors, beam position monitors, in-line varied-line spacing (VLS) wavelength spectrometer, OPIS wavelength spectrometer, sets of filters and apertures, gas absorber, fast shutter
  • optional pump-probe experiments using THz radiation .


CONTACT BL3 (soon FL11):

Pan
Rui Pan
E-Mail: Rui Pan
Phone: +49 (0)40 8998 (9)4526
Location: 49 / 115
Toleikis
Sven Toleikis
E-Mail: Sven Toleikis
Phone: +49 (0)40 8998 (9)3827
Location: 49 / 105

FL12 (ex BL 1) / CAMP
non-monochromatic direct SASE beam

BL 2
no longer available!
non-monochromatic direct SASE beam

BL 3
non-monochromatic direct SASE beam

Focus size FWHM (µm) (theor.)

~ 5x7

~20 / unfocused (~7 mm)

~20 / unfocused (~7 mm)

Focal length (m)

0.81 (hor), 0.55 (ver)

2 /NA

2 /NA

Focusing mirror

KB System

ellipsoidal/none

ellipsoidal/none

Beam height above floor (mm)

1600 ± 20

1600 ± 20

1600 ± 20

Distance of last flange of beamline (CF 40) to focus (mm)

NA

527.5/NA

527.5/NA

Distance focus- undulator (m)

76

73

72.2

No. of mirrors to exp (C coating), reflection angle

6 (2°,2°,2°,2°,3°,3°) focused
also Ni coating available

3 (2°, 2°, 3°) focused
2 (2°, 2°) unfocused also Ni coating available

5 (2°, 2°, 3°, 3°, 3°) focused
4 (2°, 2°, 3°, 3°) unfocused

Option to only use Ni mirrors

yes

yes (unfocused)
no (focused)

no (unfocused)
no (focused)

BL transmission (% at 13.5 nm, C coating)

48±5

64±4

59±6

Area for Experiment (m*m)

3*4
(consult BL1 contact)

3*4

3.5*4

Optical laser for pump-probe

no

no

no

Optical laser height (mm)

1500

1500

1500

THz for pump-probe

no

no

yes

Split-and delay unit

yes

yes

no

Gas attenuator

yes

yes

yes

Transmission filters

Al, Si, Zr, Nb

Al, Si, Zr, Nb

Al, Si, Zr, Nb

Fast shutter

yes

yes

yes

Pump-Probe Lasers and Endstation Instruments

You can find the parameters of our Pump-Probe Lasers serving the individual beamlines HERE.

You might also want to have a look at our portfolio of instruments HERE in order to find out what is most suitable for your experimental idea.


Reference:

K. Tiedtke et al., The soft X-ray free-electron laser FLASH at DESY: beamlines, diagnostics, and end stations, New J. Phys. 11, 023029 (2009). http://dx.doi.org/10.1088/1367-2630/11/2/023029

Publications from beamline FL12 (BL1) and CAMP (after 2015): click here

Publications from former beamline BL2: click here

Publications from beamline FL11 (BL3): click here

Publications from THz beamline at FL11(BL3): click here