Incoherent synchrotron emission of laser-driven plasma edge

TL;DR

This paper develops an analytical model for incoherent synchrotron emission from plasma edges driven by intense lasers, aligning well with 3D simulations and advancing understanding of relativistic plasma interactions.

Contribution

It introduces a self-consistent analytical model for plasma edge motion that incorporates both coherent and incoherent radiation reaction effects.

Findings

Model agrees with 3D PIC simulations in specific regimes.

Describes relativistic electron dynamics and gamma-photon emission.

Provides insights into high harmonic generation and ion acceleration.

Abstract

When a relativistically intense linearly polarized laser pulse is incident on an overdense plasma, a dense electron layer is formed on the plasma edge which relativistic motion results in high harmonic generation, ion acceleration and incoherent synchrotron emission of gamma-photons. Here we present a self-consistent analytical model that describes the edge motion and apply it to the problem of incoherent synchrotron emission by ultrarelativistic plasma electrons. The model takes into account both coherent radiation reaction from high harmonics and incoherent radiation reaction in the Landau-Lifshitz form. The analytical results are in agreement with 3D particle-in-cell simulations in a certain parameter region that corresponds to the relativistic electronic spring interaction regime.