Work

Three-dimensional theory of superradiant free-electron lasers

Year: 2024

Type: article

Abstract: The solitonlike superradiant regime of free-electron lasers (FEL) offers a promising path towards ultrashort pulses, beyond the natural limit dictated by the bandwidth of the high-gain FEL instability. In this work we present a three-dimensional theory of the superradiant regime, including the effects of beam emittance and energy spread. Our work takes advantage of recent developments in nonlinear FEL theory to provide a fully analytical description of solitonlike superradiance. Our theory proves the existence of a diffraction-dominated steady-state regime in which the superradiant peak power grows indefinitely while leaving the pulse duration and on-axis intensity almost unchanged. These results are in excellent agreement with three-dimensional simulations and are supported by recent experimental results at the Linac Coherent Light Source. This work advances nonlinear FEL theory and provides a theoretical framework for the next generation of attosecond x-ray FELs. Published by the American Physical Society 2024

Source: Physical Review Research

DOI: 10.1103/physrevresearch.6.033158

Authors: River R. Robles, Luca Giannessi, Agostino Marinelli

Institutions: SLAC National Accelerator Laboratory, Stanford University, Elettra-Sincrotrone Trieste S.C.p.A., Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati

Language: English

Topic: Particle Accelerators and Free-Electron Lasers

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,625

Funders: U.S. Department of Energy, Office of Science, Basic Energy Sciences