Speaker
Description
Argonne National Laboratory is exploring next-generation x-ray free-electron laser (XFEL) concepts to enable
capabilities beyond existing facilities while complementing the Advanced Photon Source (APS) storage ring. In
this early phase, the focus is on architectures that support multi-user operation and deliver versatile photon-
pulse characteristics, including flexible temporal structure, wavelength tunability, and customizable pulse
formats.
Advanced accelerator concepts under consideration include collinear wakefield acceleration and two-beam
acceleration as potential pathways to compact, high-efficiency XFELs. Synergies with a possible evolution of
the APS injection complex are also being explored to leverage existing infrastructure.
This contribution outlines the emerging vision and key directions and invites community input on photon-pulse
requirements to help guide the development of a next-generation XFEL at Argonne.