scholarly journals Three-Dimensional, Time-Dependent Analysis of High- and Low-Q Free-Electron Laser Oscillators

2021 ◽  
Vol 11 (11) ◽  
pp. 4978
Author(s):  
Peter J. M. van der Slot ◽  
Henry P. Freund
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Three Dimensional ◽  
High Gain ◽  
Electromagnetic Spectrum ◽  
X Rays ◽  
Free Electron Lasers ◽  
Wavefront Propagation ◽  
Laser Oscillators ◽  
Time Dependent Analysis

Free-electron lasers (FELs) have been designed to operate over virtually the entire electromagnetic spectrum, from microwaves through to X-rays, and in a variety of configurations, including amplifiers and oscillators. Oscillators can operate in both the low and high gain regime and are typically used to improve the spatial and temporal coherence of the light generated. We will discuss various FEL oscillators, ranging from systems with high-quality resonators combined with low-gain undulators, to systems with a low-quality resonator combined with a high-gain undulator line. The FEL gain code MINERVA and wavefront propagation code OPC are used to model the FEL interaction within the undulator and the propagation in the remainder of the oscillator, respectively. We will not only include experimental data for the various systems for comparison when available, but also present, for selected cases, how the two codes can be used to study the effect of mirror aberrations and thermal mirror deformation on FEL performance.

Three-dimensional statistical theory for analyzing high-gain free-electron laser at saturation

2014 ◽  
Vol 26 (2) ◽  
pp. 25103
Author(s):  
张辉 Zhang Hui ◽  
张鹏飞 Zhang Pengfei ◽  
李一丁 Li Yiding
Keyword(s):  
Statistical Theory ◽  
Free Electron ◽  
Free Electron Laser ◽  
Three Dimensional ◽  
High Gain

scholarly journals The FERMI free-electron lasers

2015 ◽  
Vol 22 (3) ◽  
pp. 485-491 ◽  
Author(s):  
E. Allaria ◽  
L. Badano ◽  
S. Bassanese ◽  
F. Capotondi ◽  
D. Castronovo ◽  
...  
Keyword(s):  
Wavelength Range ◽  
Harmonic Generation ◽  
Free Electron ◽  
Free Electron Laser ◽  
High Gain ◽  
Free Electron Lasers ◽  
Operating Modes ◽  
20 Nm

FERMI is a seeded free-electron laser (FEL) facility located at the Elettra laboratory in Trieste, Italy, and is now in user operation with its first FEL line, FEL-1, covering the wavelength range between 100 and 20 nm. The second FEL line, FEL-2, a high-gain harmonic generation double-stage cascade covering the wavelength range 20–4 nm, has also completed commissioning and the first user call has been recently opened. An overview of the typical operating modes of the facility is presented.

Time-Dependent, Three-Dimensional Simulation of Free-Electron-Laser Oscillators

2009 ◽  
Vol 102 (24) ◽  
Author(s):  
P. J. M. van der Slot ◽  
H. P. Freund ◽  
W. H. Miner Jr. ◽  
S. V. Benson ◽  
M. Shinn ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Three Dimensional ◽  
Time Dependent ◽  
Laser Oscillators ◽  
Dimensional Simulation

Two-color X-ray free-electron laser consisting of broadband and narrowband beams

2020 ◽  
Vol 27 (6) ◽  
pp. 1720-1724
Author(s):  
Ichiro Inoue ◽  
Taito Osaka ◽  
Toru Hara ◽  
Makina Yabashi
Keyword(s):  
Photon Energy ◽  
Free Electron ◽  
Free Electron Laser ◽  
Intensity Ratio ◽  
Energy Separation ◽  
Nonlinear Interactions ◽  
X Rays ◽  
Free Electron Lasers ◽  
Simple Scheme ◽  
X Ray

A simple scheme is proposed and experimentally confirmed to generate X-ray free-electron lasers (XFELs) consisting of broadband and narrowband beams with a controllable intensity ratio and a large photon-energy separation. This unique two-color XFEL beam will open new opportunities for investigation of nonlinear interactions between intense X-rays and matter.

scholarly journals A Review of High-Gain Free-Electron Laser Theory

Atoms ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 28
Author(s):  
Nicola Piovella ◽  
Luca Volpe
Keyword(s):  
Spontaneous Emission ◽  
Free Electron ◽  
Free Electron Laser ◽  
Amplified Spontaneous Emission ◽  
High Gain ◽  
Free Electron Lasers ◽  
Undulator Radiation ◽  
Laser Theory ◽  
X Ray ◽  
Single Pass

High-gain free-electron lasers, conceived in the 1980s, are nowadays the only bright sources of coherent X-ray radiation available. In this article, we review the theory developed by R. Bonifacio and coworkers, who have been some of the first scientists envisaging its operation as a single-pass amplifier starting from incoherent undulator radiation, in the so called self-amplified spontaneous emission (SASE) regime. We review the FEL theory, discussing how the FEL parameters emerge from it, which are fundamental for describing, designing and understanding all FEL experiments in the high-gain, single-pass operation.

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