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Hard X-rays for coherent, time-resolved and imaging experiments at ALBA II

4 October 2021
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1. Welcome
Klaus Attenkofer
04/10/2021, 09:00
2. Coherent synchrotron X-rays to enlighten the complexity of biological organs & organisms: a multi-scale and multi-modal approach
Paola Coan
04/10/2021, 09:10

Over the past decades, synchrotron X-rays have open new avenues in biomedical research. The high degree of coherence and brilliance of synchrotron beams have made possible to reach unprecedented level of detail in the investigation of biological tissues through the application of advanced experimental techniques in in-vitro and in-vivo models. Ex-vivo studies allow optimizing experimental...
3. Challenges for correlating STED and synchrotron XRF nano-imaging to explore metal functions in synapses
Richard Ortega
04/10/2021, 09:40

High spatial resolution correlative imaging approaches are needed to understand structure-function relationships in cell biology. These correlative approaches are particularly challenging for the study of biologically active metals in synapses due to (i) the labile binding of these elements, (ii) the nanoscale size of synaptic structures; (iii) the low concentrations of these elements. We...
4. Hard X-ray nano-tomography for life sciences
Alexandra Pacureanu
04/10/2021, 10:10

Recent advances in hard X-ray microscopy make possible reaching new levels of resolving power in thick biological samples. Thanks to high brilliance coherent beams combined with cutting-edge nano-focusing optics and high precision tomographic scanning, X-ray holography can probe the 3D structure of up to millimeter sized tissues at tens of nanometers spatial resolution. This opens new horizons...
5. Deep Learning for Synchrotron X-ray Imaging
Xiaogang Yang
04/10/2021, 10:55

X-ray imaging scans at today's synchrotron light sources can yield thousands of image frames per second at high resolution. Current and expected data volumes and rates necessitate having reliable, efficient, and fully automated data processing pipelines. Traditional image processes are difficult to be modeled and are not robust enough for the data with complex patterns and noises. Deep...
6. X-ray three-dimensional magnetic imaging, the future is brilliant!
Valerio Scagnoli
04/10/2021, 11:25

Over the last years, we have worked towards developing methods to fabricate and characterize three-dimensional magnetic structures. Specifically, we have combined X-ray magnetic imaging with new iterative reconstruction algorithms to achieve X-ray magnetic tomography and laminography [1-4]. In a first demonstration, we have determined the three-dimensional magnetic nanostructure within the...
7. Round Table
04/10/2021, 11:55
8. Use of Coherence Methods in X-ray Powder Diffraction
Ian Robinson (UCL)
04/10/2021, 14:00

Multibend Achromat Upgrades are being developed at a number of Synchrotron Radiation facilities, including ALBA. By greatly reducing the beam emittance, the coherent fraction of the X-rays produced by the undulators is correspondingly increased. The “diffraction limit” is reached where all X-rays up to a certain energy cutoff are fully coherent. This energy is expected to move into the hard...
9. Exploiting brilliance at cSAXS, the small-angle X-ray scattering beamline at the Swiss Light Source
Ana Díaz
04/10/2021, 14:30

Located at about 1 hour from Zurich, the Swiss Light Source is a 3rd generation synchrotron quite comparable in size with Alba. The coherent small-angle X-ray scattering (cSAXS) beamline exploits the brilliance of its undulator source to perform experiments such as scanning SAXS, in which the beam is focused to a spot of about 10 microns and the specimen is raster scanned. By collecting SAXS...
10. Time resolved computed tomography/tomoscopy
Francisco García Moreno
04/10/2021, 15:00

Time-resolved in-situ and operando tomography is increasingly moving into the focus of materials research. Improvements in time and spatial resolution will be presented, which allow for an analysis of fast phenomena and detailed 3D process imaging. We apply real-time in-situ tomography with acquisitions rates of up to 1000 tomograms per second, which we call “tomoscopy”. The sample environment...
11. Probing structure development during “in-operando” processes by time resolved simultaneous Small and Wide Angle X-ray Scattering with synchrotron radiation
Tiberio Ezquerra (Instituto de Estructura de la Materia, IEM-CSIC)
04/10/2021, 15:45

Since the earliest application of synchrotron radiation to the investigation of soft condensed matter it became clear that time resolved Small Angle X-ray Scattering (SAXS) experiments enabled plenty of opportunities for precise “in-situ” structural characterization[1-3]. The simultaneous use of Wide Angle X-ray Scattering with SAXS (SAXS/WAXS) paved the way for an extensive plethora of...
12. Complex Systems and Coherent X-rays: A perfect match
Beatrice Ruta
04/10/2021, 16:15

X-ray Photon Correlation Spectroscopy (XPCS) is a spatio-temporal coherent X-ray scattering technique that probes slow collective dynamics at the nanometric and atomic scale based on the ob-servation of fluctuating far-field speckle patterns [1].
This technique has been successfully applied to the investigation of the slow relaxation processes occurring in disordered materials undergoing...
13. Quantitative and chemical nanoimaging of heterogeneous materials by 3D X-ray ptychography
Julio César da Silva
04/10/2021, 16:45

The properties of functional composite materials are heavily a↵ected by the arrangement of the different material phases within their 3D structure. The ability of visualizing their structures with high sensitivity and nanometric spatial resolution can improve the engi- neering of these composites. Ptychography is coherent X-ray imaging technique that has revolutionized this type of...
14. Round Table
04/10/2021, 17:15
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