Numerical investigation of electron self-injection in the nonlinear bubble regime

C. Benedetti, C. B. Schroeder, E. Esarey, F. Rossi, W. P. Leemans
2013 Physics of Plasmas  
The process of electron self-injection in the nonlinear bubble wake generated by a short and intense laser pulse propagating in an uniform underdense plasma is studied by means of fully self-consistent particle-incell simulations and test-particle simulations. We consider a wake generated by a non-evolving laser driver traveling with a prescribed velocity, which then sets the structure and the velocity of the wake, so the injection dynamics is decoupled from driver evolution but a realistic
more » ... cture for the wakefield is retained. We show that a threshold for self-injection into a non-evolving bubble wake exists, and we characterize the dependence of the self-injection threshold on laser intensity, wake velocity, and plasma temperature for a range of parameters of interest for current and future laser-plasma accelerators.
doi:10.1063/1.4824811 fatcat:q3yo6wm2zrelbbiogeakf6dghm