The l=3 diocotron mode in an electron plasma confined in a Malmberg–Penning trap has been resonantly excited by means of a rotating electric field applied on an azimuthally four-sectored electrode. The experimental observations are interpreted with a theory based on the linearization of the drift-Poisson equations and by means of two-dimensional particle-in-cell simulations. The experimental technique presented in this paper is able to selectively excite different diocotron perturbations and can be efficiently used for electron or positron plasma control and manipulation.
|Titolo:||Excitation of the l=3 diocotron mode in a pure electron plasma by means of a rotating electric field|
|Parole Chiave:||drift instability; electric fields; perturbation theory; plasma simulation; Poisson equation|
|Settore Scientifico Disciplinare:||Settore FIS/03 - Fisica della Materia|
|Data di pubblicazione:||1-mar-2009|
|Digital Object Identifier (DOI):||10.1063/1.3086619|
|Appare nelle tipologie:||01 - Articolo su periodico|