Results 11 to 20 of about 265,473 (286)

X-Ray Free Electron Lasers [PDF]

open access: yesJournal of Physics B: Atomic, Molecular and Optical Physics, 2017
In a free-electron laser (FEL) the lasing medium is a high-energy beam of electrons flying with relativistic speed through a periodic magnetic field. The interaction between the synchrotron radiation that is produced and the electrons in the beam induces a periodic bunching of the electrons, greatly increasing the intensity of radiation produced at a ...
Feldhaus, J.   +2 more
  +5 more sources

SwissFEL: The Swiss X-ray Free Electron Laser

open access: yesApplied Sciences, 2017
The SwissFEL X-ray Free Electron Laser (XFEL) facility started construction at the Paul Scherrer Institute (Villigen, Switzerland) in 2013 and will be ready to accept its first users in 2018 on the Aramis hard X-ray branch.
Christopher J. Milne   +114 more
doaj   +3 more sources

Superconducting undulator activities at the European X-ray Free-Electron Laser Facility

open access: yesFrontiers in Physics, 2023
For more than 5 years, superconducting undulators (SCUs) have been successfully delivering X-rays in storage rings. The European X-Ray Free-Electron Laser Facility (XFEL) plans to demonstrate the operation of SCUs in X-ray free-electron lasers (FELs ...
Sara Casalbuoni   +34 more
doaj   +1 more source

An ultra-compact x-ray free-electron laser [PDF]

open access: yesNew Journal of Physics, 2020
Abstract In the field of beam physics, two frontier topics have taken center stage due to their potential to enable new approaches to discovery in a wide swath of science. These areas are: advanced, high gradient acceleration techniques, and x-ray free electron lasers (XFELs).
Rosenzweig, J. B   +36 more
openaire   +5 more sources

Microsecond hydrodynamic interactions in dense colloidal dispersions probed at the European XFEL

open access: yesIUCrJ, 2021
Many soft-matter systems are composed of macromolecules or nanoparticles suspended in water. The characteristic times at intrinsic length scales of a few nanometres fall therefore in the microsecond and sub-microsecond time regimes.
Francesco Dallari   +23 more
doaj   +1 more source

Pump-probe X-ray holographic imaging of laser-induced cavitation bubbles with femtosecond FEL pulses

open access: yesNature Communications, 2021
Cavitation bubbles show many nonlinear characteristics of liquid and gas phase. Here the authors demonstrate coherent diffractive imaging of cavitation bubble using infrared pump and XFEL probe and discuss the formation and evolution of the bubbles.
M. Vassholz   +20 more
doaj   +1 more source

Ultrafast orbital tomography of a pentacene film using time-resolved momentum microscopy at a FEL

open access: yesNature Communications, 2022
Ultrafast pulses are useful to investigate the electron dynamics in excited atoms, molecules and other complex systems. Here, the authors measure transient photoelectron momentum maps following the free-electron laser pulse-induced ionization of a ...
Kiana Baumgärtner   +21 more
doaj   +1 more source

Using low dose x-ray speckle visibility spectroscopy to study dynamics of soft matter samples

open access: yesNew Journal of Physics, 2021
We demonstrate the successful application of x-ray speckle visibility spectroscopy (XSVS) experiments to study the dynamics of radiation sensitive, biological samples with unprecedented small x-ray doses of 45 Gy and below.
Johannes Möller   +12 more
doaj   +1 more source

Stability of Bragg reflectors under megahertz heat load at XFELs

open access: yesJournal of Synchrotron Radiation, 2023
Modern X-ray free-electron laser (XFEL) sources can deliver photon pulses with millijoule pulse energies and megahertz repetition rate. As shown by the simulations in this work, for particular cases the dynamical heat load effects for Bragg reflectors ...
Immo Bahns   +3 more
doaj   +1 more source

First Experiments in Structural Biology at the European X-ray Free-Electron Laser

open access: yesApplied Sciences, 2020
Ultrabright pulses produced in X-ray free-electron lasers (XFELs) offer new possibilities for industry and research, particularly for biochemistry and pharmaceuticals.
Grant Mills   +2 more
doaj   +1 more source

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