We present the first commissioning results of the XFEL laser oscillator (XFELO) demonstrator project, a joint European XFEL and DESY effort. XFELOs promise unprecedented coherence, stability and Brilliance in the hard X-ray regime. Their successful realization would mean a leap forward for the
field of FELs, opening new experimental opportunities and facilitating the notoriously demanding...
Following the first demonstration of isolated attosecond FEL pulses in 2018 and the Nobel prize in (tabletop) attosecond science in 2023, demand for attosecond x-ray pulses has increased exponentially.
This talk would review recent advances in attosecond pulse generation, including: attosecond lasing at LCLS-II; the first demonstration of attosecond super-radiance; and a measurement of FEL...
ThomX is a demonstrator of Compact Compton Source. In 2024 they reported a flux of 10^10 x-rays/s and significant improvement have been made to the machine after that improvement. The first user runs have taken place at the beginning of 2025,so there will be interesting results to report in 2026.
[1] https://journals.aps.org/prab/abstract/10.1103/PhysRevAccelBeams.28.023401
The first 4th generation light source in China, HEPS, has been constructed and commissioned. The new light source is expected to produce the emittance of less than 100 pm.rad that can provide hard X-rays with the brilliance higher than 10^22 photons/sec/mm^2/mrad^2/0.1%B.W. In order to stably operate this ultra-low emittance ring, HEPS accommodated the advanced swap-out beam injection scheme,...
The MAX IV 3 GeV storage ring in Lund, Sweden, was the first implementation of a multibend achromat (MBA) lattice fourth-generation light source. Since it started delivery of light in 2016, three succeeding MBA-based rings and variants have come on-line: ESRF-EBS, Sirius and APS-U. Several others are being planned, designed, built or commissioned. All of these capitalize on the MBA concept and...
