Electron acceleration by laser wakefield and x-ray emission at moderate intensity and density in long plasmas

Ferrari, H. E.; Lifschitz, A. F.; Maynard, G.; Cros, B.
August 2011
Physics of Plasmas;Aug2011, Vol. 18 Issue 8, p083108
Academic Journal
The dynamics of electron acceleration by laser wakefield and the associated x-rays emission in long plasmas are numerically investigated for parameters close to the threshold of laser self-focusing. The plasma length is set by the use of dielectric capillary tubes that confine the gas and the laser energy. Electrons self-injection and acceleration to the 170 MeVs are obtained for densities as low as 5 × 1018 cm-3 and a moderate input intensity (0.77 × 1018 W/cm2). The associated x-ray emission at the exit of the capillary tube is shown to be an accurate diagnostic of the electrons self-injection and acceleration process.


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