Electron beam acceleration using Colliding pulses injection in parabolic plasma channel

Abstract

optical injection of electrons in laser wakefield accelerator scheme has been shown using the PIC simulation of colliding pulse injection method. Parameter scans like laser polarization, colliding angle, delay and injector pulse intensity have been carried out, to get the optimum values for the injection. To guide the laser pulse over many Rayleigh lengths a parabolic plasma channel is used. For a 45 fs laser pulse of intensity 9 × 1018 W/cm2 focused to spot size of 6 µm inside a plasma of density 4.0 × 1018 cm−3, a highly mono-energetic electron beam with 2.1 pC charge at 337 MeV was obtained.