Balder is hard x-ray XAS/XES beamline at MAX IV. For a more detailed description of the beamline and updated status information, see the Balder webpages.

 In spring 2016, the beamline optics was installed and commissioning of it was started. During summer/autumn 2016, the beamline source (in-vacuum wiggler) will be installed and commissioned. The following beamline functionalities will be tested:

  • Various modes of DCM (double crystal monochromator) scanning: point-by-point, continuous, quick
  • Various modes of DCM feedback control
  • Collimation by CM (collimating mirror) and focusing by FM (focusing mirror)
  • Split-electrode ionization chambers at very high currents
  • Fluorescence detectors (7-elements Ge detector and 7-elements Si-drift detector)
  • Control/data acquisition software


The photon energy available at Balder during commissioning experiments in autumn 2016 will be limited to the Si111 range (2.4 – ~20 keV) and a proper vacuum sample environment will not be available. This limits operations to in-air samples (and thus to energies above ~7 keV) and to room temperature.

Expertise and experience relevant to the following issues are of particular importance for upcoming Balder commissioning:

  • Continuous scans: trajectory selection and synchronization
  • Monochromator glitches and XAFS data quality in general
  • Work with fluorescence detectors: calibration and dead time correction
  • Work with ionization chambers
  • Work in Sardana/Tango control system