Generation of Quasi-monoenergetic Electron Beams with High Charge by Laser-Driven Plasma-Based Acceleration

Abstract

Quasi-monoenergetic electron beams containing more than 3×108 electrons in the monoenergtic peak with energies of 40 to 60 MeV have been obtained from a plasma produced by an 8 TW, 50 fs laser pulse. The energy conversion efficiency from the laser pulse to the electrons in the monoenergetic peak is up to 0.8%. The total number of electrons in the peak and the energy conversion efficiency achieved by this experiment are the highest among those achieved by experiments in which an imaging plate was used as an electron detector.