19 citations · 68 across the 11 of their papers we have counts for
11 papers
Up-sampling of electron beam simulation particles with addition of shot-noise
P. Traczykowski, L. T. Campbell, B. W. J. McNeil
An algorithm and numerical code for the up-sampling of a system of particles, from a smaller to a larger number, is described. The method introduces a Poissonian `shot-noise' to th…
Analysis of Ultra-Short Bunches in Free-Electron Lasers
Lawrence Campbell, Henry Freund, James Henderson +3
Free-electron lasers (FELs) operate at wavelengths from millimeter waves through hard x-rays. At x-ray wavelengths, FELs typically rely on self-amplified spontaneous emission (SASE…
Comparison Between, and Validation Against an Experiment of, a Slowly-Varying Envelope Approximation Code and a Particle-in-Cell Simulation Code for Free-Electron Lasers
L. T. Campbell, H. P. Freund, J. Henderson +3
Free-electron lasers (FELs) operate at wavelengths down to hard x-rays, and are either seeded or start from noise. There is increasing interest in x-ray FELs that rely on Self-Ampl…
An extended model of the quantum free-electron laser
M. S. Brown, J. R. Henderson, L. T. Campbell +1
Previous models of the quantum regime of operation of the Free Electron Laser (QFEL) have performed an averaging and the application of periodic boundary conditions to the coupled…
Wide Bandwidth, Frequency Modulated Free Electron Laser
L. T. Campbell, B. W. J. McNeil
It is shown via theory and simulation that the resonant frequency of a Free Electron Laser may be modulated to obtain an FEL interaction with a frequency bandwidth which is at leas…
Velocity Dispersion of Correlated Energy Spread Electron Beams in the Free Electron Laser
L. T. Campbell, A. R. Maier
The effects of a correlated linear energy/velocity chirp in the electron beam in the FEL, and how to compensate for its effects by using an appropriate taper (or reverse-taper) of…
Modelling elliptically polarised Free Electron Lasers
J R Henderson, L T Campbell, H P Freund +1
A model of a Free Electron Laser operating with an elliptically polarised undulator is presented. The equations describing the FEL interaction, including resonant harmonic radiatio…
Free Electron Lasers using `Beam by Design'
J. R. Henderson, L. T. Campbell, B. W. J. McNeil
Several methods have been proposed in the literature to improve Free Electron Laser output by transforming the electron phase-space before entering the FEL interaction region. By u…
Two-Colour Free Electron Laser with Wide Frequency Separation using a Single Monoenergetic Electron Beam
L. T. Campbell, B. W. J. McNeil, S. Reiche
Studies of a broad bandwidth, two-colour FEL amplifier using one monoenergetic electron beam are presented. The two-colour FEL interaction is achieved using a series of undulator m…
Tunable Electron Multibunch Production in Plasma Wakefield Accelerators
B. Hidding, O. Karger, G. Wittig +15
Synchronized, independently tunable and focused J-class laser pulses are used to release multiple electron populations via photo-ionization inside an electron-beam driven plasma…
Investigation of a 2-Colour Undulator FEL Using Puffin
L. T. Campbell, B. W. J. McNeil, S. Reiche
Initial studies of a 2-colour FEL amplifier using one monoenergetic electron beam are presented. The interaction is modelled using the unaveraged, broadband FEL code Puffin. A seri…