Proceedings of the workshop Collective Phenomena in by G Bertin; Abdus Salam International Centre for Theoretical

By G Bertin; Abdus Salam International Centre for Theoretical Physics.; et al

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Additional info for Proceedings of the workshop Collective Phenomena in Macroscopic Systems, Villa Olmo, Como, Italy, 4 - 6 December 2006

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Note in particular that the section close to the entrance gives essentially an image of the cathode (initial condition) for vz > 0, while for vz < 0 both the contributions of the electrons reflected by the virtual cathode and by the potential barrier are present. 4. Conclusions The onset and relaxation of turbulence, and the formation and evolution of coherent structures in an electron plasma, of relevance for generic rotating systems, have been studied in the Malmberg-Penning trap ELTRAP using two different experimental settings: trapped plasma and electron beam reflected by an externally applied potential barrier.

Pozzoli, M. Rom´e and Yu. Tsidulko, Appl. Phys. Lett. 84, 3807 (2004). 10. Yu. Tsidulko, R. Pozzoli and M. Rom´e, J. Comp. Phys. 209, 406 (2005). 20 SELF-ORGANIZATION OF NON-LINEAR VORTICES IN PLASMA LENS FOR ION-BEAM-FOCUSING IN CROSSED RADIAL ELECTRICAL AND LONGITUDINAL MAGNETIC FIELDS VASYL MASLOV, IVAN ONISHCHENKO NSC Kharkov Institute of Physics & Technology Kharkov, 61108, Ukraine ALEXEY GONCHAROV Institute of Physics NASU, Kiev, 252650, Ukraine The structure and nonlinear dynamics of vortices in plasma lens for high-current ionbeam focusing have been investigated theoretically.

In the following we will frequently refer to two important cases: the symmetric case where the beams have equal densities and opposite velocities and the asymmetric case where one beam is much denser and thus much slower than the other. For relativistic velocities the ECFI growth rate is of the order of the Langmuir frequency: thus this mechanism of magnetic field generation can be effective in the case of the interaction of an ultrashort, ultraintense laser pulse with a plasma where most phenomena occur on timescales of the order −1 of the electron dynamical time ωpe .

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Proceedings of the workshop Collective Phenomena in by G Bertin; Abdus Salam International Centre for Theoretical
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