High-quality multi-GeV electron bunches via cyclotron autoresonance

TL;DR

This paper demonstrates theoretically that high-quality, multi-GeV electron bunches can be generated via cyclotron autoresonance using intense circularly polarized laser pulses and magnetic fields, with potential for energies exceeding 100 GeV.

Contribution

It introduces a novel theoretical approach to produce ultra-high quality electron bunches with energies over 10 GeV using laser and magnetic field parameters feasible with current or near-future technology.

Findings

Feasibility of generating over 10-GeV electron bunches with ultra-high quality.

Potential to reach energies exceeding 100 GeV with weakly focused pulses from a 200-PW laser.

Electron bunches have a relative energy spread of about 10^-4.

Abstract

Autoresonance laser acceleration of electrons is theoretically investigated using circularly polarized focused Gaussian pulses. Many-particle simulations demonstrate feasibility of creating over 10-GeV electron bunches of ultra-high quality (relative energy spread of order 10^-4), suitable for fundamental high-energy particle physics research. The laser peak intensities and axial magnetic field strengths required are up to about 10^18 W/cm^2 (peak power ~10 PW) and 60 T, respectively. Gains exceeding 100 GeV are shown to be possible when weakly focused pulses from a 200-PW laser facility are used.