Even US president Ronald Reagan finds it bewildering. “It is inconceivable to me,” he says, “that the great nations of the ...

Proton beams with giga-electron-volt (GeV) energies—once thought to be achievable only with massive particle accelerators—may ...

Abstract: When a high-intensity laser interacts with a solid target, a well-known phenomenon, namely, the production of multimegaelectronvolt particles, occurs. However, if the laser and target ...