Radiation Reaction Effect on Laser Driven Auto-Resonant Particle Acceleration

TL;DR

This paper investigates how radiation reaction influences laser-driven auto-resonant particle acceleration, revealing a radiation-dominated regime that enhances energy gain and broadens resonance, with quantum corrections found negligible for current and future laser systems.

Contribution

It introduces a detailed analysis of radiation reaction effects on auto-resonant acceleration, including quantum corrections, and identifies optimal conditions for high-energy electron production.

Findings

Radiation reaction causes saturation in energy gain.

Resonance broadening enables energy gain in non-resonant particles.

Quantum corrections are negligible for current laser facilities.

Abstract

The effects of radiation reaction force on laser driven auto-resonant particle acceleration scheme are studied using Landau-Lifshitz equation of motion. These studies are carried out for both linear as well as circularly polarized laser fields in the presence of static axial magnetic field. From the parametric study, a radiation reaction dominated region has been identified in which the particle dynamics is greatly effected by this force. In the radiation reaction dominated region the two significant effects on particle dynamics are seen viz., (1) saturation in energy gain by the initially resonant particle, (2) net energy gain by a initially non-resonant particle which is caused due to resonance broadening. It has been further shown that with the optimum choice of parameters this scheme can be efficiently used to produce electrons with energies in the range of hundreds of TeV. The quantum corrections to the Landu-Lifshitz equation of motion have also been taken into account. The difference in the energy gain estimates of the particle by the quantum corrected and classical Landu-Lifshitz equation are found to be insignificant for the present day as well as upcoming laser facilities.