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.
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.
Example in-situ XRD data can be found here.
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.
Please contact the beamline staff prior to submission, if you intent to use complementary XRD in your proposal!
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