# Ion Acceleration in Laser Generated Mega Tesla Magnetic Vortex

## TL;DR

This paper uses 3D simulations to explore laser-driven ion acceleration via magnetic vortex acceleration, demonstrating high-energy, well-collimated proton beams and the generation of mega Tesla magnetic fields, advancing understanding of laser-plasma interactions.

## Contribution

It provides an extensive parameter space analysis of magnetic vortex acceleration using 3D simulations, revealing key factors for efficient ion acceleration and magnetic field generation.

## Key findings

- High collimation and charge of proton beams
- Scaling of ion energy with laser power
- Generation of mega Tesla magnetic fields

## Abstract

Magnetic Vortex Acceleration (MVA) from near critical density targets is one of the promising schemes of laser-driven ion acceleration. 3D particle-in-cell simulations are used to explore a more extensive laser-target parameter space than previously reported on in the literature as well as to study the laser pulse coupling to the target, the structure of the fields, and the properties of the accelerated ion beam in the MVA scheme. The efficiency of acceleration depends on the coupling of the laser energy to the self-generated channel in the target. The accelerated proton beams demonstrate high level of collimation with achromatic angular divergence, and carry a significant amount of charge. For PW-class lasers, this acceleration regime provides favorable scaling of maximum ion energy with laser power for optimized interaction parameters. The mega Tesla-level magnetic fields generated by the laser-driven co-axial plasma structure in the target are prerequisite for accelerating protons to the energy of several hundred MeV.