The multimodal XAS-XRD endstation at Balder allows for simultanous measurements of XAS and XRD for in-situ / in-operando investigations. It adds a 2D EIGER 1M detector, which is mounted on a robot arm for flexible positioning, to the experimental setup.

Schematic representation of the combined XAS-XRD setup at Balder.

Data acquisition is currently implemented in sequential mode: XRD-XAS-XRD-XAS… This allows to freely choose the energy of XRD acquisition (within a window of ~3keV from the XAS energy range. The overall achieved time resolution for combined measurements is dominated by XAS acquisition and currently reaches down to approx. 1s. The q-range and resolution can be varied taking advantage of the flexibility in positioning the detector. However, measurements are performed with a stationary detector, with fixed q-range.

Sequential mode XAS-XRD data acquisition

Example in-situ XRD data can be found here.

Diffraction rings obtained from LaB6 with 1s exposure time.

In the current state, raw and reduced data (from the live azimuthal integration pipeline) is provided along with Jupyter-notebook based analysis scripts. Users have to be able to perform further data analysis.

Foreseeable Upgrades

  • An overhead rail system for flexible positioning of the detector is currently under commissioning
  • We will offer soon a parallel data acquisition scheme to achieve ms time resolution for XRD

Page manager: Kajsa Sigfridsson Clauss February 6, 2026