ATTENZIONE: Lunedì 15 Luglio, dalle 13:00 alle 15:00 sarà effettuato un intervento di manutenzione su Durante tale fascia oraria il servizio potrà risultare non raggiungibile.

ATTENTION: On Monday 15 July, from 1:00 pm to 3:00 pm, maintenance will be carried out on During this time slot, the service may be unreachable.

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
SML Sala Maria Luisa (Hotel Hermitage)

SML Sala Maria Luisa

Hotel Hermitage

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


Dr Fatema Tanjia (Università di Napoli Federico II and INFN Sezione di Napoli)


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)


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