The European strategy for accelerator-based photon science R. Abela, C. Biscari, J. Daillant, H. Dosch and L. Rivkin Eur. Phys. J. Plus, 138 4 (2023) 355 Published online: 25 April 2023 DOI: 10.1140/epjp/s13360-023-03947-w