Polarized light from the transportation of a matter-antimatter beam in a plasma

Abstract

A relativistic electron-positron beam propagating through a magnetized electron-ion plasma is shown to generate both circularly and linearly polarized synchrotron radiation. The degrees of circular and linear polarizations depend both on the density ratio of pair beam to background plasma and initial magnetization, and a maximum degree of circular polarization $⟨P_{\text{circ}}⟩\approx 18\%$ is found to occur for a tenuous pair beam. We demonstrate that the generation of circularly polarized radiation is intrinsically linked to asymmetric energy dissipation of the pair beam during the filamentation instability dynamics in the electron-ion plasma. These results can help in understanding the recent observations of circularly polarized radiation from gamma-ray-bursts.

References in corpus (15)

• The Physics of Gamma-Ray Bursts
• Generation of Magnetic Fields in the Relativistic Shock of Gamma-Ray-Burst Sources
• SMILEI: a collaborative, open-source, multi-purpose particle-in-cell code for plasma simulation
• Interpenetrating plasma shells: near-equipartition magnetic field generation and non-thermal particle acceleration
• Observation of magnetic field generation via the Weibel instability in interpenetrating plasma flows
• Gamma-Ray Burst Afterglow: Polarization and Analytic Light Curves
• Polarization of prompt GRB emission: evidence for electromagnetically-dominated outflow
• Filamentation instability of counter-streaming laser-driven plasmas
• A table-top laser-based source of femtosecond, collimated, ultra-relativistic positron beams
• Synthetic Spectra from PIC Simulations of Relativistic Collisionless Shocks
• Circular polarization in the optical afterglow of GRB 121024A
• Experimental observation of a current-driven instability in a neutral electron-positron beam
• The upstream magnetic field of GRB shocks
• Probing the Magnetic Field Structure in Gamma-Ray Bursts through Dispersive Plasma Effects on the Afterglow Polarization
• Particle acceleration and radiation friction effects in the filamentation instability of pair plasmas

Cited by in corpus (4)

• Polarized ultrashort brilliant multi-GeV $\gamma$-rays via single-shot laser-electron interaction
• Electron-positron annihilation into two photons in an intense plane-wave field
• Pair-beam propagation in a magnetised plasma for modelling the polarized radiation emission from gamma-ray bursts in laboratory astrophysics experiments
• Magnetized Current Filaments as a Source of Circularly Polarized Light