Free Electron Laser (FEL)

A Free Electron Laser (FEL) is a type of laser that generates highly tunable, intense light by passing a beam of high-speed electrons through a magnetic structure called an undulator. As electrons wiggle in the magnetic field, they emit light that can be adjusted across a wide range of wavelengths, from infrared to X-rays. Unlike traditional lasers, FELs use free electrons rather than bound atoms, allowing for precise control over the light's properties, making them valuable for advanced scientific research, medical imaging, and material analysis.