High-gain, free-electron laser amplifiers: Design considerations and simulation

Prosnitz, D.; Szöke, A.; Neil, V. K.

doi:10.1103/physreva.24.1436

Cited by 119 publications

(19 citation statements)

References 4 publications

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“…It is thus important to maintain a sufficiently large microbunching throughout the tapered region as this increases the refractive index of the electron beam and boosts the coherent interaction between the electrons and the radiation [15]. It is useful at this point to consider the trapping function F t ðzÞ which determines the fraction of electrons trapped in the FEL bucket along the tapered undulator:…”

Section: Tapering Optimization Methodsmentioning

confidence: 99%

Terawatt x-ray free-electron-laser optimization by transverse electron distribution shaping

Emma

Fang

et al. 2014

Phys. Rev. ST Accel. Beams

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We study the dependence of the peak power of a 1.5 Å Terawatt (TW), tapered x-ray free-electron laser (FEL) on the transverse electron density distribution. Multidimensional optimization schemes for TW hard x-ray free-electron lasers are applied to the cases of transversely uniform and parabolic electron beam distributions and compared to a Gaussian distribution. The optimizations are performed for a 200 m undulator and a resonant wavelength of λ r ¼ 1.5 Å using the fully three-dimensional FEL particle code GENESIS. The study shows that the flatter transverse electron distributions enhance optical guiding in the tapered section of the undulator and increase the maximum radiation power from a maximum of 1.56 TW for a transversely Gaussian beam to 2.26 TW for the parabolic case and 2.63 TW for the uniform case. Spectral data also shows a 30%-70% reduction in energy deposited in the sidebands for the uniform and parabolic beams compared with a Gaussian. An analysis of the transverse coherence of the radiation shows the coherence area to be much larger than the beam spotsize for all three distributions, making coherent diffraction imaging experiments possible.

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Section: Tapering Optimization Methodsmentioning

confidence: 99%

Terawatt x-ray free-electron-laser optimization by transverse electron distribution shaping

Emma

Fang

et al. 2014

Phys. Rev. ST Accel. Beams

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“…These sources include traveling wave tubes and free electron lasers (FELs) [1][2][3][4][5][6][7]. The degree to which an electron beam can be bunched is a strong function of the beam quality.…”

Section: Methods For Conditioning Electron Beams In Free Electron Lasersmentioning

confidence: 99%

Methods for Conditioning Electron Beams in Free Electron Lasers

Sprangle¹,

Joyce²,

Hafizi³

et al. 1993

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“…PROMETEO is a 1D, multiparticle code [36] based on a modified version of the Prosnitz, Szoke, and Neil formulation of the FEL dynamical equations [37,38]. The original model has been generalized to include the effect of beam emittance and the undulator errors.…”

Section: Prometeomentioning

confidence: 99%

<title>Exotic harmonic generation schemes in high-gain free-electron lasers</title>

et al. 2002

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The mechanism of nonlinear harmonic generation in the exponential gain regime, which is driven by bunching at the fundamental wavelength, may provide a path toward both enhancing and extending the usefulness of an x-ray free-electron laser (FEL) facility. Related "exotic" generation schemes, which exploit properties of harmonic production in various undulator topologies, have been discussed both in the past and more recently. Using three different numerical simulation codes, we explore the possible utility of such schemes (e.g., harmonic "afterburners" and biharmonic undulators) at future light source facilities.

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High-gain, free-electron laser amplifiers: Design considerations and simulation

Cited by 119 publications

References 4 publications

Terawatt x-ray free-electron-laser optimization by transverse electron distribution shaping

Terawatt x-ray free-electron-laser optimization by transverse electron distribution shaping

Methods for Conditioning Electron Beams in Free Electron Lasers

<title>Exotic harmonic generation schemes in high-gain free-electron lasers</title>

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