Bridging the gap of storage ring light sources and linac-driven free-electron lasers

High-gain free-electron lasers (FELs) are driven by short, high-charge density electron beams as only produced at dedicated single pass or recirculating linear accelerators. We describe new conceptual, technical, and modeling solutions to produce subpicosecond, up to \ensuremath{\sim}100\text{ }\text{ }\ensuremath{\mu}\mathrm{J}energy extreme ultra-violet and soft x-ray FEL pulses at high- and tunable repetition rates, from...