Electrons trajectories around a bubble regime in intense laser plasma interaction

Abstract

Some typical electrons trajectories around a bubble regime in intense laser plasma interaction are investigated theoretically. By considering a modification of the fields and ellipsoid bubble shape due to the presence of residual electrons in the bubble regime, we study in detail the electrons nonlinear dynamics with or without laser pulse. To examine the electron dynamical behaviors, a set of typical electrons, which locate initially at the front of the bubble, on the transverse edge and at the bottom of the bubble respectively, are chosen for study. It is found that the range of trapped electrons in the case with laser pulse is a little narrower than that without laser pulse. The partial phase portraits for electrons around the bubble are presented numerically and their characteristic behaviors are discussed theoretically. Implication of our results on the high quality electron beam generation is also discussed briefly. V C 2013 AIP Publishing LLC.

Effect of trapezoidal plasma density region in bubble wakefield acceleration

“…These electrons are accumulated on the lower and upper boundary of the bubble, forming a sheath of electrons. These electrons are then trapped in the first wake at the tail of the bubble and can be self-injected into the bubble [11][12][13][14][15][16][17][18][19][20]. Selfinjection of plasma electrons in bubble wakefield is the development for generation of high quality electrons beam [21][22][23][24][25][26][27][28][29][30].…”