CFEL-I

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2017-08-01
15:10
[PUBDB-2017-08794] Journal Article
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Incoherent Diffractive Imaging via Intensity Correlations of Hard X Rays
ddc:550
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2017-07-25
10:57
DBCoverage [PUBDB-2017-08413] Journal Article
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Single-shot determination of focused FEL wave fields using iterative phase retrieval
Optics express 25(15), 17892 - 17903 (2017) [10.1364/OE.25.017892]  GO
ddc:530
Determining fluctuations in focus properties is essential for many experiments at Self-Amplified-Spontaneous-Emission (SASE) based Free-Electron-Lasers (FELs), in particular for imaging single non-crystalline biological particles. We report on a diffractive imaging technique to fully characterize highly focused, single-shot pulses using an iterative phase retrieval algorithm, and benchmark it against an existing Hartmann wavefront sensor. [...]
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2017-07-10
21:35
[PUBDB-2017-07304] Journal Article
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FELIX: an algorithm for indexing multiple crystallites in X-ray free-electron laser snapshot diffraction images
ddc:540
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2017-07-06
13:15
[PUBDB-2017-06978] Journal Article
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Continuous diffraction of molecules and disordered molecular crystals
ddc:540
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2017-03-16
15:22
OpenAccess [PUBDB-2017-01394] Journal Article
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Double-flow focused liquid injector for efficient serial femtosecond crystallography
ddc:000
Serial femtosecond crystallography requires reliable and efficient delivery of fresh crystals across the beam of an X-ray free-electron laser over the course of an experiment. We introduce a double-flow focusing nozzle to meet this challenge, with significantly reduced sample consumption, while improving jet stability over previous generations of nozzles. [...]
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2017-03-15
21:50
OpenAccess [PUBDB-2017-01388] Internal Report
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Atomic Resolution Incoherent Diffractive Imaging (IDI) via Intensity-IntensityCorrelations of Hard X-rays
The advent of accelerator-driven x-ray free-electron lasers has opened new avenues for high resolution structure determination via diffraction methods that go far beyond conventional x-ray crystallography methods. While these techniques rely on coherent scattering, incoherent processes like Compton scattering and fluorescence emission - the predominant scattering mechanism in the x-ray regime - are generally considered detrimental for imaging applications. [...]
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2017-02-13
10:11
[PUBDB-2017-00953] Journal Article
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Atomic Structure of Granulin Determined from Native Nanocrystalline Granulovirus Using an X-ray Free-Electron Laser
ddc:000
To understand how molecules function in biological systems, new methods are required to obtain atomic resolution structures from biological material under physiological conditions. Intense femtosecond-duration pulses from X-ray free-electron lasers (XFELs) can outrun most damage processes, vastly increasing the tolerable dose before the specimen is destroyed [...]

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2017-01-10
09:30
OpenAccess [PUBDB-2017-00397] Journal Article
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Strain-relief by single dislocation loops in calcite crystals grown on self-assembled monolayers
ddc:500
Most of our knowledge of dislocation-mediated stress relaxation during epitaxial crystal growth comes from the study of inorganic heterostructures. Here we use Bragg coherent diffraction imaging to investigate a contrasting system, the epitaxial growth of calcite (CaCO3) crystals on organic self-assembled monolayers, where these are widely used as a model for biomineralization processes. [...]
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2017-01-06
16:16
[PUBDB-2017-00244] Journal Article
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Configurable NOR gate arrays from Belousov-Zhabotinsky micro-droplets
ddc:530
We investigate the Belousov–Zhabotinsky (BZ) reaction in an attempt to establish a basis for computation using chemical oscillators coupled via inhibition. The system consists of BZ droplets suspended in oil. [...]
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2017-01-06
16:14
[PUBDB-2017-00243] Journal Article
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In Situ 3D Imaging of Catalysis Induced Strain in Gold Nanoparticles
ddc:530
Multielectron transfer processes are crucially important in energy and biological science but require favorable catalysts to achieve fast kinetics. Nanostructuring catalysts can dramatically improve their properties, which can be difficult to understand due to strain- and size-dependent thermodynamics, the influence of defects, and substrate-dependent activities. [...]

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