Ion dynamics effect in forming relativistic solitons in plasmas

Abstract

By using one-dimensional self-consistent relativistic fluid model, moving relativistic electromagnetic solitons with high intensity in electron-ion plasmas where the ion dynamics is taken into account are investigated numerically. It is demonstrated that two types of relativistic solitons with a precisely defined group velocity can occur in underdense and overdense plasmas with a given different background density. One is single-humped with weak scalar and vector potential amplitude; the other is multi-humped with high one. For these two types of solitons, the eigenvalue spectra of the group velocity versus the background density are found. The existence of soliton solutions is investigated in plasmas with a different background density, and the properties of these solitons are presented in detail.