A5057561371- Advanced X-ray Imaging Techniques
- Particle Accelerators and Free-Electron Lasers
- X-ray Spectroscopy and Fluorescence Analysis
- Nuclear Physics and Applications
- Crystallography and Radiation Phenomena
- Radiation Shielding Materials Analysis
- Nanoparticles: synthesis and applications
- Particle accelerators and beam dynamics
- Advanced X-ray and CT Imaging
- Advancements in Photolithography Techniques
- Plant nutrient uptake and metabolism
- Radioactivity and Radon Measurements
- Superconducting Materials and Applications
- Advanced Radiotherapy Techniques
- Geochemistry and Elemental Analysis
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Electron Microscopy Techniques and Applications
- Medical Imaging Techniques and Applications
- Plasma Diagnostics and Applications
- Biochemical effects in animals
- Cultural Heritage Materials Analysis
- thermodynamics and calorimetric analyses
- Magnetic and Electromagnetic Effects
- Cholinesterase and Neurodegenerative Diseases
- Building materials and conservation
European Synchrotron Radiation Facility
2018-2025
Elkhorn Slough Foundation
2023
Uppsala University
2021
Tohoku University
2020
Autonomous University of Chihuahua
2019
Universidad Nacional Autónoma de México
2008-2016
ALBA Synchrotron (Spain)
2014-2015
The chemical composition of fossil foraminiferal shells (tests) is widely used as tracers for past ocean chemistry. It therefore important to understand how different (trace-)elements are transported and incorporated into these tests from adjacent seawater. elemental distribution within the walls might be differentiate between proposed transport mechanisms. Here, micro-distribution Mg, Mn, Na, S Sr in three species foraminifera, known have contrasting test chemistry, investigated by a...
Significance Ink, invented in ancient Egypt circa 5,000 y ago, is the established and time-honored medium wherewith humankind commits words to writing. A comprehensive synchrotron-based microanalysis of a considerable corpus Egyptian papyri from Roman period, inscribed with red black inks, reveal hitherto undetected complex composition inks. Highlighted by presence iron, color can be attributed use ocher. Unexpectedly, lead regularly present both inks associated phosphate, sulfate, chloride,...
The performance of a new X-ray spectrometer is presented. device was designed originally to be employed in environmental sciences, and allows the use different types primary radiation sources, such as radioactive source (241Am) or tubes with anodes metals (Rh W). Among advantages this are possibility exchanging detectors improve efficiency at energy ranges [such Si (Li), Si-PIN, hyperpure Ge, CdTe detectors], attach it wavelength dispersive system, its vacuum atmospheric pressure....
The morphology of TiO<sub>2</sub> particles and their status within soil aggregates may provide insights on origin.
Although the graphitic carbon contamination of synchrotron beamline optics has been an obvious problem for several decades, basic mechanisms underlying process as well cleaning/remediation strategies are not understood and corresponding cleaning procedures still under development. In this study analysis remediation all based on in situ low-pressure RF plasma approaches is reported, including a quantitative determination optimum parameters their influence chemistry morphology optical test...
The ID10 beamline of the SESAME (Synchrotron-light for Experimental Science and Applications in Middle East) synchrotron light source Jordan was inaugurated June 2023 is now open to scientific users. beamline, which designed installed within European Horizon 2020 project BEAmline Tomography at (BEATS), provides full-field X-ray radiography microtomography imaging with monochromatic or polychromatic X-rays up photon energies 100 keV. generated by a 2.9 T wavelength shifter variable gap,...
We introduce a model that can accurately simulate radiation from undulator sources for ray tracing applications. It incorporates several key effects relevant to fourth-generation synchrotron sources, such as electron emittance, energy spread, and diffraction-limited beam size. This code has been developed part of SHADOW4 , the latest version widely used SHADOW X-ray optics program. The approach relies on calculating field distribution in far field, which determines divergences. integration...
Different approaches to simulate a modern X-ray beamline are considered. Several methodologies with increasing complexity applied discuss the relevant parameters that quantify performance. Parameters such as flux, dimensions and intensity distribution of focused beam, coherence properties obtained from simple analytical calculations sophisticated computer simulations using ray-tracing wave optics techniques. A latest-generation nanofocusing for coherent applications (ID16A at ESRF) has been...
Abstract Background Phosphorus (P) deficiency limits crop production worldwide. Crops differ in their ability to acquire and utilise the P available. The aim of this study was determine root traits (root exudates, system architecture (RSA), tissue-specific allocation P, gene expression roots) that (a) play a role P-use efficiency (b) contribute large shoot zinc (Zn) concentration Brassica oleracea . Results Two B. accessions (var. sabellica C6, kale, var. italica F103, broccoli) were grown...
Synchrotron techniques allow a systematic study in tissues from the<italic>Phaseolus vulgaris</italic>seed coat treated with different concentrations of Ag nanoparticles.
Amyloid plaques are one of the principal hallmarks Alzheimer's disease and mainly composed Aβ amyloid peptides together with other components such as lipids, cations, or glycosaminoglycans. The structure peptide's aggregates is related to peptide toxicity highly depends on aggregation conditions presence cofactors. While fibrillary nowadays considered nontoxic, oligomeric/granular (nonfibrillary) have been found be toxic. In this work we characterized in situ two different types deposits...
Abstract Objective . Radiation therapy requires reliable dosimetry protocols to deliver successful treatments with high accuracy and precision. In this context, accurate knowledge of the beam’s energy spectra is mandatory. The goal study was validate synchrotron x-ray spectrum ID17 beamline at European Synchrotron Facility (ESRF). modification storage ring in recent years necessitates a new characterisation radiation beamline. validated will be starting point for possible future clinical...
Titanium dioxide nanoparticles are used in different processes, derived from this their presence wastewater is common, concentrating residual sludge. These residues as agricultural soil improvers, being a source of crop exposure. In study, the effect TiO2-NPs (450, 900, and 1800 mg L-1) on germination alfalfa, tomato, pepper seeds was evaluated. The parameters were not (p > 0.05) except for, seed vigor index alfalfa pepper, mean time tomato. below 80% 450 L-1 which showed moderate...
The performance of a liquid-nitrogen-cooled high-heat-load monochromator with horizontal scattering plane has been analysed, aiming to preserve the high quality X-ray beam in vertical for downstream optics. Using finite-element analysis, height profiles crystal surface various heat loads and corresponding slope errors meridional sagittal planes were calculated. Then angular distortions reflected both calculated analytically also modelled by ray tracing, revealing good agreement two...
Finite-element analysis is used to study the thermal deformation of a multilayer mirror due heat load from undulator beam at low-emittance synchrotron source, specifically ESRF-EBS upgrade beamline EBSL-2. The energy bandwidth double-multilayer monochromator larger than that relevant harmonic, such considerable portion reflected. Consequently, absorbed power non-uniformly distributed on surface. geometry substrate optimized minimize thermally induced slope errors. We distinguish between...
TiO2 nanoparticles (TiO2-NPs) have a wide range of industrial applications (paintings, sunscreens, food and cosmetics) is one the most intensively used nanomaterials worldwide. Leaching from commercial products TiO2-NPs are predicted to significantly accumulate in wastewater sludges, which then often as soil amendment. In this work, sludge samples four treatment plants Chihuahua State Mexico were obtained during spring summer (2017). A comprehensive characterization study was performed by...
A new algorithm to perform coherent mode decomposition of undulator radiation is proposed. It based on separating the horizontal and vertical directions, reducing problem by working with one-dimension wavefronts. The validity conditions this approximation are discussed. Simulations require low computer resources run interactively a laptop. focusing lenses emitted an in fourth-generation storage ring (EBS-ESRF) studied. Results compared against multiple optics packages implementing variety...
The phase problem in the context of focusing synchrotron beams with X-ray lenses is addressed. feasibility retrieving surface error a lens system by using only intensity propagated beam at several distances demonstrated. A neural network, trained few thousand simulations random errors, can predict accurately profile that accounts for all aberrations. It demonstrates routinely measuring aberrations induced an lens, or another optical system, images.