Results 51 to 60 of about 71,310 (277)

Formation of electron bunches for harmonic cascade x-ray free electron lasers

Physical Review Special Topics. Accelerators and Beams, 2006
Specific requirements for the electron beam in harmonic cascade-free electron lasers, together with means to produce such beams, are presented. All results are illustrated with simulations and particle tracking studies.
M. Cornacchia, S. Di Mitri, G. Penco, A. A. Zholents   +3 more
doaj   +1 more source

Dynamic structure elucidation of chemical reactivity by laser pulses and X-ray probes [PDF]

, 2015
Visualising chemical reactions by X-ray methods is a tantalising prospect. New light sources provide the prospect for studying atomic, electronic and energy transfers accompanying chemical change by X-ray spectroscopy and inelastic scattering.
Bartlett, Stuart A., Evans, John, Hamilton, Michelle L.   +2 more
core   +2 more sources

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

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, Fredrik Orädd, Konstantinos Magkakis, Magnus Andersson   +3 more
wiley   +1 more source

From attosecond to zeptosecond coherent control of free-electron wave functions using semi-infinite light fields [PDF]

, 2017
Light-electron interaction in empty space is the seminal ingredient for free-electron lasers and also for controlling electron beams to dynamically investigate materials and molecules. Pushing the coherent control of free electrons by light to unexplored
Barwick, B., Berruto, G., Carbone, F., de Abajo, F. Javier Garcia, Kaminer, I., Lamb, R. J., Madan, I., McGrouther, D., Pomarico, E., Vanacore, G. M., Wang, K.   +10 more
core   +3 more sources

Optical Shaping of X-Ray Free-Electron Lasers

Physical Review Letters, 2016
In this Letter we report the experimental demonstration of a new temporal shaping technique for x-ray free-electron lasers (FELs). This technique is based on the use of a spectrally shaped infrared (IR) laser and allows optical control of the x-ray generation process.
A, Marinelli, R, Coffee, S, Vetter, P, Hering, G N, West, S, Gilevich, A A, Lutman, S, Li, T, Maxwell, J, Galayda, A, Fry, Z, Huang   +11 more
openaire   +3 more sources

Analysing the significance of small conformational changes and low occupancy states in serial crystallographic data

FEBS Open Bio, EarlyView.
This protocol paper outlines methods to establish the success of a time‐resolved serial crystallographic experiment, by means of statistical analysis of timepoint data in reciprocal space and models in real space. We show how to amplify the signal from excited states to visualise structural changes in successful experiments.
Jake Hill, Yelyzaveta Pulnova, Elke De Zitter, Helen M. Ginn, Briony A. Yorke   +4 more
wiley   +1 more source

At-wavelength characterization of X-ray wavefronts in Bragg diffraction from crystals

Journal of Synchrotron Radiation, 2023
The advent of next-generation synchrotron radiation sources and X-ray free-electron lasers calls for high-quality Bragg-diffraction crystal optics to preserve the X-ray beam coherence and wavefront.
Xianbo Shi, Zhi Qiao, Paresh Pradhan, Peifan Liu, Lahsen Assoufid, Kwang-Je Kim, Yuri Shvyd'ko   +6 more
doaj   +1 more source

Thermoreflectance Detection of Point Defects Resulting from Focused Ion Beam Milling

Advanced Engineering Materials, EarlyView.
Focused ion beam (FIB) milling is a common tool for nanoscale material processing, however irradiation damage, redeposition, and contamination can occur. We use several characterization tools to show FIB‐induced effects beyond 1 mm from the milled area.
Thomas W. Pfeifer, Eric R. Hoglund, Anton V. Ievlev, Patrick E. Hopkins   +3 more
wiley   +1 more source

Quantitative Imaging of Single, Unstained Viruses with Coherent X-rays

, 2008
Since Perutz, Kendrew and colleagues unveiled the structure of hemoglobin and myoglobin based on X-ray diffraction analysis in the 1950s, X-ray crystallography has become the primary methodology used to determine the 3D structure of macromolecules ...
A. C. Steven, Adrian Mancuso, Bagrat Amirbekian, Changyong Song, Huaidong Jiang, J. Kirz, Jianwei Miao, Li Peng, Ren Sun, Sanket S. Shah, Tetsuya Ishikawa, Z. Hong Zhou   +11 more
core   +1 more source

Acoustic Injectors Meet X-Ray Free-Electron Lasers [PDF]

Structure, 2016
In this issue of Structure, Roessler et al. (2016) present a new method to acoustically inject samples for serial femtosecond crystallography into the focus of free-electron lasers. This method can drastically reduce the sample consumption of this method. It will therefore play an important role in the mix of sample preparation technologies.
openaire   +3 more sources