The FlexPES (Flexible PhotoElectron Spectroscopy) beamline caters for the experimental needs of both Surface/Material Science and Low Density Matter user communities offering the possibility to perform a variety of photoemission and soft X-ray absorption experiments in the photon energy range 40 – 1500 eV. The two-branch configuration with double-striped toroidal refocusing mirrors ensures maximum flexibility – up to four endstations can be accommodated on the two branches of the beamline simultaneously, and each of these endstations can avail of different focusing conditions. The end stations offer a diverse range of experimental techniques, detectors and sample handling facilities and can be used with a variety of sample delivery systems.

Techniques (as available by Q1 2021)

Available forTechnique/facility description
General UsersBeamline: Linear horizontally polarized light from LPU, with energy range 40-1500 eV. Spot on sample both defocused (0.5-1.5 mm) and focused (from 50x15 um to 150x40 um in different end stations).
General UsersSurface- and Material Science (SMS) branch:
- High-resolution photoelectron spectroscopy (PES) on solid samples using DA30-L(W) analyzer and 4-axis manipulator;
- X-ray absorption spectroscopy (XAS or NEXAFS) using total electron yield, partial electron yield and partial fluorescence yield (SDD detector);
- Fast NEXAFS by continuous/non-stop scanning
- Possibility to transfer samples in a vacuum suitcase from/to the off-line MAX IV STM lab (this option requires adding "SPM-lab" to your DUO proposal).
General UsersLow Density Matter (LDM) branch:
High-resolution PES on LDM samples using R4000 analyzer with the following sample delivery systems (samples must be approved by chemical safety group):
- Liquid jet setup for e.g. aqueous solutions
- Molecular jet source (continuous beam) for experiments on cold beams of atomic and molecular gases
- Gas cell for PES experiments on atomic and molecular gases
- Magnetron-based source for metal particle beams

ICE end station: COLTRIMS/Multi-coincidence spectroscopy; to be used with molecular jet/cluster source (for details see ICE end station webpage in the MAX IV LDM webpages).
General UsersSingle Bunch Mode:
One week of single-bunch operation available in the Fall 22 beamtime period. Please state clearly in your beamtime proposal if you are applying for beamtime during the available single bunch week!


Nano solutions for future supercomputers: resolving the von-Neumann bottleneck

Image: The chip developed by researchers during the project. Credit: Saketh Ram Mamidala Researchers from Lund University benefitted from MAX IV laboratory to find solutions to the long-standing technological challenge: the von-Neumann bottleneck. After nearly year-long research during the pandemic, they successfully integrated the processor and memory onto a single vertical nanowire in a 3D