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Sep 13 – 19, 2015
La Biodola, Isola d'Elba
Europe/Rome timezone

Numerical investigation on the formation and stability of a hollow electron beam in the presence of a plasma wake field driven by an ultra-short electron bunch

Sep 17, 2015, 6:50 PM
20m
SML Sala Maria Luisa (Hotel Hermitage)

SML Sala Maria Luisa

Hotel Hermitage

talk WG1 - Electron beams from plasmas WG1 - Electron beams from plasmas

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)

Presentation materials