Free-electron lasers can be tuned to operate over a wide range of wavelengths, but they conventionally require large-scale facilities. Researchers from The University of Osaka show that laser wakefield acceleration can dramatically miniaturize this technology by improving plasma stability and electron beam quality. Their study demonstrates such lasers in the extreme ultraviolet, with the ultimate goal of further refining the technology to operate at x-ray wavelengths.

Emissions of NOx and carbon monoxide have dropped on the city's streets since 2005, according to research from University of Utah atmospheric scientists that could help Utah address its air quality problems. Pollution reductions stem from cleaner cars, tougher regulations and traffic levels that have not rebounded following pandemic lockdowns.