Laser-Plasma Accelerator Powers Free-Electron Laser for Record-Breaking 8 Hours
For the first time, researchers have demonstrated that a laser-plasma accelerator can reliably drive a free-electron laser for more than eight hours. Published in Physical Review Accelerators and Beams, the result was achieved by a team led by Finn Kohrell at…
Scientists have achieved a landmark breakthrough in particle accelerator technology, demonstrating for the first time that a laser-plasma accelerator can reliably drive a free-electron laser for more than eight consecutive hours. The milestone, published in the journal Physical Review Accelerators and Beams, marks a significant leap toward practical, compact alternatives to conventional large-scale accelerator facilities.
The research was led by Finn Kohrell and his team, who successfully maintained stable operation of the free-electron laser over the extended period — a feat that had previously eluded scientists working with laser-plasma technology. Free-electron lasers are powerful light sources used across scientific disciplines, from materials science to biology, but they have traditionally required massive and expensive infrastructure to operate.
Laser-plasma accelerators work by using intense laser pulses to drive plasma waves, which in turn accelerate electrons to high energies over remarkably short distances. While the technology has long promised to miniaturize next-generation accelerators, sustaining the stability needed to drive a free-electron laser over long operational periods has remained a persistent engineering challenge.
The eight-hour continuous run demonstrated that laser-plasma accelerators can now meet the demanding stability and reliability requirements of free-electron laser operation. The team employed advanced feedback and control systems to maintain consistent electron beam quality throughout the experiment, addressing one of the central obstacles that had limited previous attempts.
The implications of this result are far-reaching. Compact laser-plasma-driven free-electron lasers could one day be deployed at universities and research institutions that currently lack access to large-scale synchrotron or free-electron laser facilities, democratizing access to powerful X-ray and ultraviolet light sources for the broader scientific community.
Researchers in the field have hailed the result as a turning point. While further work is needed to scale performance and extend operational lifetimes even further, the experiment provides compelling proof of concept that the technology is maturing rapidly and edging closer to real-world deployment.