Results 51 to 60 of about 133,829 (307)

GdBCO bulk superconducting helical undulator for x-ray free-electron lasers

Physical Review Research, 2023
We report on the performance of a new type of helical undulator based on bulk single-grain GdBa_{2}Cu_{3}O_{7−δ} high-temperature superconductors. The 104-mm-long prototype with a period length of 16 mm and a magnetic aperture of 4 mm achieves an on-axis
Marco Calvi, Sebastian Hellmann, Eduard Prat, Thomas Schmidt, Kai Zhang, Anthony R. Dennis, John H. Durrell, Mark D. Ainslie   +7 more
doaj   +1 more source

Statistical properties of the radiation from SASE FEL operating in a post-saturation regime with and without undulator tapering

, 2015
We describe statistical and coherence properties of the radiation from x-ray free electron lasers (XFEL) operating in the post-saturation regime. We consider practical case of the SASE3 FEL at the European XFEL.
Schneidmiller, E. A., Yurkov, M. V.
core   +1 more source

Laser-pumped coherent x-ray free-electron laser [PDF]

Physical Review Special Topics - Accelerators and Beams, 2009
In a laser-pumped x-ray free-electron laser (FEL) an intense laser field replaces the magnetic wiggler field of a conventional FEL. Depending on the intensity and quality of both the electron beam and pump laser, the Thomson backscattered radiation can be coherently amplified.
P. Sprangle, B. Hafizi, J. R. Peñano
openaire   +2 more sources

Multi-wavelength anomalous diffraction de novo phasing using a two-colour X-ray free-electron laser with wide tunability

Nature Communications, 2017
X-ray free-electron lasers produce bright femtosecond X-ray pulses. Here, the authors use a two-colour X-ray free-electron laser beam for simultaneous two-wavelength data collection and show that protein structures can be determined with multiple ...
Alexander Gorel, Koji Motomura, Hironobu Fukuzawa, R. Bruce Doak, Marie Luise Grünbein, Mario Hilpert, Ichiro Inoue, Marco Kloos, Gabriela Kovácsová, Eriko Nango, Karol Nass, Christopher M. Roome, Robert L. Shoeman, Rie Tanaka, Kensuke Tono, Yasumasa Joti, Makina Yabashi, So Iwata, Lutz Foucar, Kiyoshi Ueda, Thomas R. M. Barends, Ilme Schlichting   +21 more
doaj   +1 more source

X-Ray Amplification from a Raman Free-Electron Laser [PDF]

Physical Review Letters, 2012
accepted for publication in Phys. Rev. Lett.
Andriyash, Igor, D'Humieres, Emmanuel, Tikhonchuk, Vladimir, Balcou, Philippe   +3 more
openaire   +3 more sources

Pair Creation and an X-Ray Free Electron Laser [PDF]

Physical Review Letters, 2001
Physical Review ...
Alkofer, R., Hecht, M. B., Roberts, C. D., Schmidt, S. M., Vinnik, D. V.   +4 more
openaire   +3 more sources

Prevailing features of X-ray induced molecular electron spectra revealed with fullerenes

, 2014
Intense X-ray photo-absorption from short and intense pulses by a molecule triggers complicated electron and subsequently ion dynamics leading to photo-electron spectra which are difficult to interpret.
Garibay, Abraham Camacho, Rost, Jan M., Saalmann, Ulf   +2 more
core   +1 more source

Compton spectra of atoms at high x-ray intensity [PDF]

, 2017
Compton scattering is the nonresonant inelastic scattering of an x-ray photon by an electron and has been used to probe the electron momentum distribution in gas-phase and condensed-matter samples.
Geffert, Otfried, Santra, Robin, Son, Sang-Kil   +2 more
core   +1 more source

X-ray free electron laser: opportunities for drug discovery [PDF]

Essays in Biochemistry, 2017
Past decades have shown the impact of structural information derived from complexes of drug candidates with their protein targets to facilitate the discovery of safe and effective medicines. Despite recent developments in single particle cryo-electron microscopy, X-ray crystallography has been the main method to derive structural information.
Robert K Y, Cheng, Rafael, Abela, Michael, Hennig   +2 more
openaire   +3 more sources

Bound-free $\mathbf{e}^+ \mathbf{e}^-$ pair creation with a linearly polarized laser field and a nuclear field

, 2008
The process of bound-free pair production of electrons and positrons in combined laser and Coulomb fields is investigated. It is assumed that an ion collides at relativistic speed with an intense x-ray laser beam of linear polarization.
Deneke, C., Müller, C.
core   +1 more source