Results 11 to 20 of about 596,723 (309)

High Temporal and Spectral Resolution of Stimulated X-Ray Raman Signals with Stochastic Free-Electron-Laser Pulses

open access: yesPhysical Review X, 2021
The chaotic nature of x-ray free-electron-laser pulses is a major bottleneck that has limited the joint temporal and spectral resolution of spectroscopic measurements.
Stefano M. Cavaletto   +2 more
doaj   +2 more sources

Three-dimensional model of small signal free-electron lasers

open access: yesPhysical Review Special Topics. Accelerators and Beams, 2011
Coherent electron cooling is an ultrahigh-bandwidth form of stochastic cooling which utilizes the charge perturbation from Debye screening as a seed for a free-electron laser.
Stephen Webb   +2 more
doaj   +2 more sources

Model-independent tuning for maximizing free electron laser pulse energy

open access: yesPhysical Review Accelerators and Beams, 2019
The output power of a free electron laser (FEL) has extremely high variance even when all FEL parameter set points are held constant because of the stochastic nature of the self-amplified spontaneous emission (SASE) FEL process, drift of thousands of ...
Alexander Scheinker   +8 more
doaj   +2 more sources

Short and Long-Range Electron Transfer Compete to Determine Free-Charge Yield in Organic Semiconductors

open access: yes, 2021
Understanding how Frenkel excitons efficiently split to form free-charges in low-dielectric constant organic semiconductors has proven challenging, with many different models proposed in recent years to explain this phenomenon.
Iryna G., Davydenko   +8 more
core   +1 more source

CLARA conceptual design report [PDF]

open access: yes, 2013
This report describes the conceptual design of a proposed free electron laser test facility called CLARA that will be a major upgrade to the existing VELA accelerator test facility at Daresbury Laboratory in the UK. CLARA will be able to test a number of
Muratori BD   +187 more
core   +1 more source

Electron-impact excitation of neutral boron using the R-matrix with pseudostates method [PDF]

open access: yes, 1989
We have carried out a large R-matrix with pseudostates (RMPS) calculation of the electron-impact excitation of neutral boron. The RMPS method has been employed for the excitation/ionisation of many light fusion related species, but primarily for one or ...
Gorkhover, Tais   +999 more
core   +1 more source

A Raman quantum free-electron laser model [PDF]

open access: yes, 2022
Operation of a Quantum Free Electron Laser (QFEL) could provide a compact and fully coherent source of X- and γ-rays. Imperative to experimental realization is allowing for decoherence effects of either spontaneous emission or space-charge to take place,
Luiten, O.J.   +5 more
core   +1 more source

Modelling elliptically polarised free electron lasers [PDF]

open access: yesNew Journal of Physics, 2016
14 pages, 5 ...
Henderson, J R   +3 more
openaire   +5 more sources

Sideband instability analysis based on a one-dimensional high-gain free electron laser model

open access: yesPhysical Review Accelerators and Beams, 2017
When an untapered high-gain free electron laser (FEL) reaches saturation, the exponential growth ceases and the radiation power starts to oscillate about an equilibrium. The FEL radiation power or efficiency can be increased by undulator tapering.
Cheng-Ying Tsai   +4 more
doaj   +1 more source

Unified model of electron beam shot noise and coherent spontaneous emission in the helical wiggler free electron laser

open access: yesPhysical Review Special Topics. Accelerators and Beams, 2003
A numerical algorithm for simulating electron beam shot noise in free electron lasers (FELs) is presented. Shot noise is a source of spontaneous emission that may be amplified in the self-amplified spontaneous emission regime of operation. This regime is
B. W. J. McNeil   +2 more
doaj   +1 more source

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