Speaker
Eduardo Alcides Peter
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P5.2016.pdf
Transition to self-focusing regime in a spatially modulated electrostatic
field particle accelerator
F. Russman1, S. Marini2, E. Peter1, G. I. de Oliveira3 , F. B. Rizzato1
1
Instituto de Física, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
2
LULI, Sorbonne Université, CNRS, École Polytechnique, CEA Université Paris-Saclay,
Paris, France
3
Instituto de Física, Universidade Federal do Mato Grosso do Sul, Campo Grande, Brazil
A charged particle can be self-focused and accelerated simultaneously by an electrostatic
modulated wave. It occurs under proper conditions, which depend on the initial longitudinal
and transversal velocities of the particle, the amplitude, phase-velocity and the shape
(longitudinal and transverse length scales) of the wave. However, there are also three
different regimes: the particle could pass through the wave suffering no substantial
acceleration (passing regime); the particle could be reflected by the wave (reflecting regime);
and, the particle could be accelerated with no self-focusing. In this work, we provide the full
set of equations of the proposed model and a modulational approximation that describes the
dynamics of the particle in the case of no acceleration. We explore here how occur the
transitions between these regimes by analysing the dynamics of the particle through
numerical simulations.
