Pair-beam propagation in a magnetised plasma for modelling the polarized radiation emission from gamma-ray bursts in laboratory astrophysics experiments

TL;DR

This paper investigates how a relativistic electron-positron beam propagates in a magnetized plasma and how it affects the polarization of emitted radiation, aiding understanding of gamma-ray bursts and laboratory astrophysics experiments.

Contribution

It provides new insights into polarization characteristics of radiation from pair-beam propagation in magnetized plasmas, relevant for modeling gamma-ray bursts and laboratory experiments.

Findings

High degrees of circular polarization observed in gamma-ray bursts explained.

Distinguishes filamentation modes in pair-beam dynamics.

Results applicable to laboratory astrophysics experiments.

Abstract

The propagation of a relativistic electron-positron beam in a magnetized electron-ion plasma is studied, focusing on the polarization of the radiation generated in this case. Special emphasis is laid on investigating the polarization of the generated radiation for a range of beam-plasma parameters, transverse and longitudinal beam sizes, and the external magnetic fields. Our results not only help in understanding the high degrees of circular polarization observed in gamma-rays bursts but they also help in distinguishing the different modes associated with the filamentation dynamics of the pair-beam in laboratory astrophysics experiments.