The Collaborative Network for X-ray Spectroscopy (CONEXS) aims to establish a UK community for X-ray spectroscopy, focusing on nurturing the synergy between experiment and theory.

Advances in experimental methodology aligned with technological developments, such as 3rd generation light sources, X-ray Free Electron Lasers (X-FELs) and High Harmonic Generation (HHG), has led to a paradigm shift in the capability of X-ray spectroscopy, including absorption, emission, inelastic scattering and photoelectron, to deliver highly detailed information about the geometric, electronic, spin structure and dynamics on an extremely broad range of samples in a wide array of different environments.


Accelerator tunnel at the European XFEL (Courtesy EU-XFEL)

However, the complex nature and high information content of this class of techniques means that detailed theoretical studies are often essential to provide a firm link between the spectroscopic observables and the underlying structure and dynamics.

CONEXS aims to bring together experimentalists and theoreticians working in the area of X-ray spectroscopy to achieve new levels of understanding, especially for the interpretation of experimental data.

From the perspective of the computational community, direct engagement with experimentalists can highlight theoretical challenges and act as a catalyst for the development of new methods. For the experimental community, direct engagement with theoreticians will provide expertise in the new theoretical developments providing new opportunities for data analysis.