COSMIC-Coherent Scattering and Microscopy,
a next-generation X-ray
beam line now operating at Berkeley Lab, brings together a unique set of
capabilities to measure the properties of materials at the Nano scale. It
allows scientists to probe working batteries and other active chemical
reactions, and to reveal new details about magnetism and correlated electronic
materials. COSMIC, for this X-ray beamline at Berkeley Lab's Berkeley Lab's
Advanced Light Source (ALS) allows scientists to probe working batteries and
other active chemical reactions and to reveal new details about magnetism and
correlated electronic materials.
These materials have two branches that
focus on different types of X-ray experiments: one for X-ray imaging
experiments and one for scattering experiments. In both cases, X-rays interact
with a sample and are measured in a way that provides structural, chemical,
electronic, or magnetic information about samples.
Ptychography achieves spatial resolution
finer than the X-ray spot size by phase retrieval from coherent diffraction
data, and the ALS has done this with world-record spatial resolution in two and
now three dimensions. The ptychographic tomography technique that researchers
used in this latest study allowed them to view the chemical states within
individual nanoparticles
COSMIC is focused on a range of
"soft" or low-energy X-rays that are particularly well-suited for
analysis of chemical composition within materials COSMIC's X-ray beam is also
brighter than the ALS beamline that was used to test its instrumentation, and
it will become even brighter once ALS-U is complete.
Besides Ptychography, COSMIC is also
equipped for experiments that use X-ray photon correlation spectroscopy, or
XPCS, a technique that is useful for studying fluctuations in materials
associated with exotic magnetic and electronic properties.
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Congress 2018 to be held at Bucharest, Romania during November 19-20, 2018.
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