Electron excitation by a multi passage laser beam in a plasma

The limits put by optical guiding. and channel guiding mechanisms on the La ser Wakefield Acceleration (LWFA) technique are imposed on the Resonant Las er Wakefield Acceleration (RLWFA) scheme. Energy gained by the electrons in both schemes are calculated and compared. It has presented that in the RLW FA case, the electrons gain more and more energy after each traversal of th e laser pulse and the electrons in a plasma gain about 3 GeV after 10 passa ges of the laser pulse. They gain 13 GeV when the laser light makes 50 pass ages and 26 GeV after the laser beam traverses the plasma 100 times. Moreov er. the channel guiding mechanism is integrated to the RLWFA scheme and tog ether with diffraction guiding a model for electron acceleration is propose d.