GigaGauss solenoidal magnetic field inside of bubbles excited in under-dense plasma

TL;DR

This paper introduces a novel method to generate ultra-strong, GigaGauss-level solenoidal magnetic fields in under-dense plasma using screw-shaped high-intensity laser pulses, enabling advanced applications in particle acceleration and radiation sources.

Contribution

The paper presents a new technique for producing gigantic, co-moving solenoidal magnetic fields in under-dense plasma with laser pulses, surpassing existing methods that rely on over-dense targets.

Findings

Generation of GigaGauss solenoidal magnetic fields in plasma.

Magnetic fields are co-moving with the laser pulse and aligned with electron beams.

Potential applications in guiding electron beams and enhancing light source technologies.

Abstract

Magnetic fields have a crucial role in physics at all scales, from astrophysics to nanoscale phenomena. Large fields, constant or pulsed, allow investigation of material in extreme conditions, opening up plethora of practical applications based on ultra-fast process, and studying phenomena existing only in exotic astro-objects like neutron stars or pulsars. Magnetic fields are indispensable in particle accelerators, for guiding the relativistic particles along a curved trajectory and for making them radiate in synchrotron light sources and in free electron lasers. In the presented paper we propose a novel and effective method for generating solenoidal quasi-static magnetic field on the GigaGauss level and beyond, in under-dense plasma, using screw-shaped high intensity laser pulses. In comparison with already known techniques which typically rely on interaction with over-dense or solid targets, where radial or toroidal magnetic field localized at the stationary target were generated, our method allows to produce gigantic solenoidal fields, which is co-moving with the driving laser pulse and collinear with accelerated electrons. The solenoidal field is quasi-stationary in the reference frame of the laser pulse and can be used for guiding electron beams and providing synchrotron radiation beam emittance cooling for laser-plasma accelerated electron and positron beams, opening up novel opportunities for designs of the light sources, free electron lasers, and high energy colliders based on laser plasma acceleration.