The Extreme Light Infrastructure ERIC


MAC is a Multi-purpose chamber that will be used for atomic, molecular and optical (AMO) physics and Coherent Diffractive Imaging (CDI). It can house different types of targets and can be equipped with a range of diagnostic tools.

MAC: Experimental station for AMO science and Coherent Diffractive Imaging

Maria Krikunova
Eva Klimesova
Andreas Roos Hult
Ziaul Hoque

Brief description of the available set up:

MAC chamber is located in E1 experimental hall ( ) and is connected to the high-harmonic beamline ( )

The design of MAC and available instruments is summarized in

Spectrometers and detection systems

At present the following spectrometers and detection systems are operational or in the commissioning pipeline:

  • Electron and ion Time of Flight spectrometers (in house development)
  • Velocity Map Imaging (VMI 75 mm MCP with a phosphor screen imaged by a camera with 166 fps 1936 x 1216 pix Sony CMOS 1/1.2″ sensor 72 dB (~ 12 bit resolution)) with ns gated imaging detector (Velocitas/Photec)
  • Event-driven Tpx3Cam for VMI (
    • Simultaneous detection of time (ToA) and intensity in each individual pixel
    • 256×256 pixel matrix, 55 µm pixel size
  • Magnetic bottle electron spectrometer
    • High collection and detection efficiency, high energy resolution
    • Capability to perform electron – ion coincidence measurements
  • XUV spectrometer
  • PI MTE in-vacuum XUV camera

Sample delivery

At present the following sample delivery/handling systems are operational or in the commissioning pipeline:

  • Fixed target stage
  • Gas target – either needle source or a molecular beam (cryo-cooled Even Lavie nozzle).
  • Cluster source
    • For rare gas clusters with sizes from few nm to 100s nm
    • Cryo-cooled valve for helium nanodroplet production
    • Doping chamber with oven

Time-preserving monochromator:

4 sets of gratings covering the range (1) 10 to 28 eV, (2) 25 to 54 eV, (3) 51 to 98 eV and (4) 86 to 121 eV. Manually selectable exit apertures 50, 100, 200 and 300 mm.

HHG focusing

Ellipsoidal mirror with 1:4.8 imaging ratio. Focal spot verified in commissioning experiments:  40×40 um

Available NIR/HHG  delay range

  • Long delay line
    • Maximum delay 6 ns (1 m length)
    • Delay step < 3 fs
  • Short delay line
    • Maximum delay 600 ps (10 cm length)
    • Delay step < 0.8 fs

MAC end-station with helium nanodroplet source


Model of MAC chamber with beam preparation chamber B4MAC and diagnostics: magnetic bottle, VMI spectrometer and XUV spectrometer


MAC end-station in E1 experimental


Long-lasting XUV activation of helium nanodroplets for avalanche ionization, C Medina et al, New J. Phys. 25 (2023) 053030, DOI:

Electron correlation dynamics in atomic Kr excited by XUV pulses and controlled by NIR laser pulses of variable intensity, A H Roos et al 2023 New J. Phys. 25 013038,

Nanoparticle-assisted acceleration of laser-irradiated low-density He ions, E Klimešová et al, Phys. Rev. A 104, L061101 (2012),

A multipurpose end-station for atomic, molecular and optical sciences and coherent diffractive imaging at ELI beamlines, E Klimešová et al, Eur. Phys. J. Spec. Top. 230, 4183–4194 (2021),

Plasma channel formation in NIR laser-irradiated carrier gas from an aerosol nanoparticle injector, E Klimešová et al, Sci. Rep. 9, 8851 (2019),