Protons Ride Moving Waves to Record Energy With Long-Pulse Lasers

Osaka, Japan - Imagine a proton catching a wave and surfing it to gain speed. While the imagery may seem wild, the premise of laser-driven ion acceleration has promise as an alternative to conventional accelerators. However, the ultrathin targets used to drive this increase in ion energy are vulnerable to the weak prepulse that precedes the main high-intensity laser pulse, meaning an adaptation in the process is necessary.

Nevertheless, researchers from the University of Osaka have now used lasers to create a moving electric field that accelerates protons to very high energies. This adapted approach could ultimately contribute to the development of next-generation particle accelerators, with fewer concerns about target vulnerabilities. The findings have recently been published in Progress of Theoretical and Experimental Physics.