Speaker
Dr
Fatema Tanjia
(Università di Napoli Federico II and INFN Sezione di Napoli)
Description
A numerical investigation on the spatiotemporal evolution of an electron beam, externally injected in a plasma in the presence of a plasma wake field is carried out. The latter is driven by an ultra-short relativistic axially-symmetric femtosecond electron bunch. We first derive a novel Poisson-like equation for the wake potential where the driving term is the ultra-short bunch density, taking suitably into account the interplay between the sharpness and high energy of the bunch. Then, we show that a channel is formed longitudinally, through the externally injected beam while experiencing the effects of both the beam-plasma self-interaction and the bunch-driven PWF, within the context of thermal wave model. The formation of the channel seems to be a final stage of the 3D evolution of the beam. This involves the appearance of small filaments and bubbles around the longitudinal axis. The bubbles coalesce forming a relatively stable axially-symmetric hollow beam structure.
Primary author
Dr
Fatema Tanjia
(Università di Napoli Federico II and INFN Sezione di Napoli)
Co-authors
Dr
Dusan Jovanovic
(Institute of Physics, University of Belgrade)
Prof.
Renato Fedele
(NA)
Dr
Sergio De Nicola
(CNR-SPIN and INFN Sezione di Napoli)
Tahmina Akhter
(NA)
