Results 21 to 30 of about 27,457 (262)
Free electron lasers using ‘beam by design’
New Journal of Physics, 2015 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.
J R Henderson +2 more
doaj +1 more source
Ultrashort ultraviolet free-electron lasers [PDF]
Journal of X-Ray Science and Technology, 1994 In this work we combine elements of chirped pulse amplification (CPA) techniques, now familiar in solid-state lasers, with an amplifier based upon a seeded free-electron laser (FEL). The resulting device would produce amplified pulses of unprecedented brevity at wavelengths shorter than can be currently obtained by any tunable laser system.
Umstadter, Donald +3 more
openaire +3 more sources
High average current electron guns for high-power free electron lasers
Physical Review Special Topics. Accelerators and Beams, 2011 High average power free-electron lasers (FELs) require high average current electron injectors capable of generating high quality, short duration electron bunches with a repetition rate equal to the frequency of the rf linac.
Phillip Sprangle +6 more
doaj +1 more source
Recirculated Wave Undulators for Compact FELs
Applied Sciences, 2021 Particular schemes of Free Electron Lasers (FELs) are designed to exploit wave undulators. We consider a system employing a recirculated electromagnetic undulator provided by a high-power laser in a resonator cavity.
Alessandro Curcio
doaj +1 more source
Limitations of electron beam conditioning for free-electron lasers
Physical Review Special Topics. Accelerators and Beams, 2003 Several ideas have been proposed to “condition” an electron beam prior to the undulator of a free-electron laser (FEL) by increasing each particle’s energy in proportion to the square of its transverse betatron amplitude.
P. Emma, G. Stupakov
doaj +1 more source
Bayesian Optimization of a Free-Electron Laser
Physical Review Letters, 2020 6 pages, 3 ...
J. Duris +10 more
openaire +4 more sources
Vacuum birefringence at x-ray free-electron lasers
New Journal of Physics, 2021 We study the perspectives of measuring the phenomenon of vacuum birefringence predicted by quantum electrodynamics using an x-ray free-electron laser (XFEL) alone.
Felix Karbstein +5 more
doaj +1 more source
FEBS Open Bio, EarlyView.Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley +1 more source
Pulse Duration of Seeded Free-Electron Lasers
Physical Review X, 2017 The pulse duration, and, more generally, the temporal intensity profile of free-electron laser (FEL) pulses, is of utmost importance for exploring the new perspectives offered by FELs; it is a nontrivial experimental parameter that needs to be ...
Paola Finetti +45 more
doaj +1 more source
FEBS Open Bio, EarlyView.Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei +3 more
wiley +1 more source