Results 41 to 50 of about 71,310 (277)

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

Visualizing aerosol-particle injection for diffractive-imaging experiments

, 2015
Delivering sub-micrometer particles to an intense x-ray focus is a crucial aspect of single-particle diffractive-imaging experiments at x-ray free-electron lasers.
Awel, Salah, Chapman, Henry N., Eckerskorn, Niko, Horke, Daniel A., Kirian, Richard A., Küpper, Jochen, Rode, Andrei V., Wiedorn, Max   +7 more
core   +1 more source

Design considerations for table-top, laser-based VUV and X-ray free electron lasers [PDF]

, 2006
A recent breakthrough in laser-plasma accelerators, based upon ultrashort high-intensity lasers, demonstrated the generation of quasi-monoenergetic GeV-electrons.
Backe, H., Becker, S., Eichner, T., Ferrario, M., Fuchs, M., Geissler, M., Grüner, F., Habs, D., Lauth, W., Meyer-ter-Vehn, J., Reiche, S., Schramm, U., Serafini, L., van der Geer, B., Weingartner, R.   +14 more
core   +4 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

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

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

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

Quantum Effects with an X-Ray Free-Electron Laser [PDF]

Physical Review Letters, 2002
A quantum kinetic equation coupled with Maxwell's equation is used to estimate the laser power required at an XFEL facility to expose intrinsically quantum effects in the process of QED vacuum decay via spontaneous pair production. A 9 TW-peak XFEL laser with photon energy 8.3 keV could be sufficient to initiate particle accumulation and the consequent
Roberts, C. D., Schmidt, S. M., Vinnik, D. V.   +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

AAA+ protein unfoldases—the Moirai of the proteome

FEBS Letters, EarlyView.
AAA+ unfoldases are essential molecular motors that power protein degradation and disaggregation. This review integrates recent cryo‐electron microscopy (cryo‐EM) structures and single‐molecule biophysical data to reconcile competing models of substrate translocation.
Stavros Azinas, Marta Carroni
wiley   +1 more source