Plasma, the fourth state of matter, consists of a gas in which electrons are no longer bound to atoms, which allows ...

Researchers in Prague have developed a theoretical framework for using beam-driven nonlinear plasma waves as 'relativistic mirrors' to generate bright attosecond X-ray pulses. The work connects ...

Cosmic rays, high-energy particles that travel through space, have puzzled scientists for decades. One particular feature of their energy spectrum—the “knee”—has long remained a mystery. Recent ...

For the first time, researchers have demonstrated that a laser-plasma accelerator can reliably drive a free-electron laser ...