Spatially localized self-injection of electrons in a self-modulated laser-wakefield accelerator by using a laser-induced transient density ramp.
By using a laser-induced transient density ramp, we demonstrate self-injection of electrons in a self-modulated laser-wakefield accelerator with spatial localization. The number of injected electrons reaches 1.7 x 10(8). The transient density ramp is produced by a prepulse propagating transversely to drill a density depression channel via ionization and expansion. The same mechanism of injection with comparable efficiency is also demonstrated with a transverse plasma waveguide driven by Coulomb explosion.
Chien
T-Y
TY
Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan.
Chang
C-L
CL
Lee
C-H
CH
Lin
J-Y
JY
Wang
J
J
Chen
S-Y
SY