Extremely brilliant GeV ?-rays from a two-stage laser-plasma accelerator.

The article informs that developments in laser-wakefield accelerators have led to compact ultrashort X/gamma-ray sources that are comparable with conventional synchrotron sources. Topics include scheme to efficiently produce collimated ultrabright Gamma ray beams with photon energies tunable up to GeV with a multi-petawatt laser pulse into wakefield accelerator; and numerical simulations demonstrate that Gamma ray photons/shot are produced with energy conversion efficiency for photons.