# Electromagnetic Burst Generation during Annihilation of Magnetic Field in Relativistic Laser-Plasma Interaction

## TL;DR

This paper investigates electromagnetic burst generation during magnetic field annihilation in relativistic laser-plasma interactions, combining 3D kinetic simulations and theory to explore particle acceleration and gamma flash production.

## Contribution

It provides new insights into electromagnetic burst mechanisms during magnetic reconnection in ultra-relativistic laser-plasma experiments, supported by detailed simulations and theoretical analysis.

## Key findings

- Electromagnetic bursts are generated during magnetic field annihilation.
- Strong longitudinal electric fields accelerate particles within the current sheet.
- The study models laboratory conditions relevant to astrophysical phenomena.

## Abstract

We present the results of 3-dimensional kinetic simulations and theoretical studies on the formation and evolution of the current sheet in a collisionless plasma during magnetic field annihilation in the ultra-relativistic limit. Annihilation of oppositively directed magnetic fields driven by two laser pulses interacting with underdense plasma target is accompanied by an electromagnetic burst generation. The induced strong non-stationary longitudinal electric field accelerates charged particles within the current sheet. Properties of the laser-plasma target configuration are discussed in the context of the laboratory modeling for charged particle acceleration and gamma flash generation in astrophysics.