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Mehran Shahmansouri

Mehran Shahmansouri

Academic rank: Professor
ORCID: https://orcid.org/0000-0002-1810-3206
Education: PhD.
ScopusId: 25422980900
HIndex:
Faculty: Science
Address: Physics Department/Arak University
Phone: 08632621300

Research

Title
Modulation and nonlinear evolution of multi-dimensional Langmuir wave envelopes in a relativistic plasma
Type
JournalPaper
Keywords
Modulation, Langmuir wave, relativistic plasma
Year
2016
Journal Physics of Plasmas
DOI
Researchers Mehran Shahmansouri

Abstract

The modulational instability (MI) and the evolution of weakly nonlinear two-dimensional (2D) Langmuir wave (LW) packets are studied in an unmagnetized collisionless plasma with weakly relativistic electron flow. By using a 2D self-consistent relativistic fluid model and employing the standard multiple-scale technique, a coupled set of Davey-Stewartson (DS)- like equations is derived, which governs the slow modulation and the evolution of LW packets in relativistic plasmas. It is found that the relativistic effects favor the instability of