Kilo-Tesla axial magnetic field generation with high intensity spin and orbital angular momentum beams
Abstract
Absorption of angular momentum from a high intensity laser pulse can lead to the generation of strong axial magnetic fields in plasma. The effect, known as the inverse Faraday effect can generate kilo-Tesla strength, multi-picosecond, axial magnetic fields extending over hundreds of microns in underdense plasma. In this paper we explore the effect with ultra-high intensity circularly polarized Gaussian beams and linearly polarized orbital angular momentum beams comparing analytic expressions with 3D particle-in-cell simulations. We develop a model for the transverse magnetic field profiles, introduce a new model for the temporal decay, and show that while the magnetic field strength is independent of plasma density, it has a strong dependence on the laser beam waist.
Keywords
Cite
@article{arxiv.2111.13243,
title = {Kilo-Tesla axial magnetic field generation with high intensity spin and orbital angular momentum beams},
author = {Andrew Longman and Robert Fedosejevs},
journal= {arXiv preprint arXiv:2111.13243},
year = {2021}
}