A5082465119- Advanced X-ray Imaging Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Particle Accelerators and Free-Electron Lasers
- Nuclear Physics and Applications
- Crystallography and Radiation Phenomena
- X-ray Diffraction in Crystallography
- Cultural Heritage Materials Analysis
- Electron and X-Ray Spectroscopy Techniques
- Advanced X-ray and CT Imaging
- Laser-Plasma Interactions and Diagnostics
- Clay minerals and soil interactions
- Building materials and conservation
- Astrophysical Phenomena and Observations
- Medical Imaging Techniques and Applications
- Mineralogy and Gemology Studies
- Advanced Electron Microscopy Techniques and Applications
- Advanced Surface Polishing Techniques
- Advancements in Photolithography Techniques
- Pigment Synthesis and Properties
- Enzyme Structure and Function
- Laser-induced spectroscopy and plasma
- Surface Roughness and Optical Measurements
- Radiation Detection and Scintillator Technologies
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
European Synchrotron Radiation Facility
2016-2025
Elkhorn Slough Foundation
2004-2023
Lawrence Berkeley National Laboratory
2020-2021
Uppsala University
2021
Tohoku University
2020
European Science Foundation
1992-2019
Monash University
2019
National Institute of Astrophysics, Optics and Electronics
2003-2015
Universidad Popular Autónoma del Estado de Puebla
2004-2015
Kyoto Medical Center
2013
A new version of the popular X-ray tracing code SHADOW is presented. An important step has been made in restructuring following computer engineering standards, ending with a modular Fortran 2003 structure and an application programming interface (API). The designed to be compatible original file-oriented philosophy, but simplifying compilation, installation use. In addition, users can now become programmers using newly SHADOW3 API for creating scripts, macros programs; being able deal...
XOP v2.4 consists of a collection computer programs for calculation radiation characteristics X-ray sources and their interaction with matter. Many the calculate from undulators wigglers, but others, such as tube codes, are also available. The computation index refraction attenuation coefficients optical elements using user-selectable databases containing constants is an important part package beam propagation. Coupled computations thus feasible where output one program serves input to...
Maya blue is an organo-clay artificial pigment composed of indigo and palygorskite. It was invented frequently used in Mesoamerica ancient times (eighth to 16th centuries). We analyse this paper one the characteristics that has attracted attention scientists since its rediscovery 1931: high stability against chemical aggression (acids, alkalis, solvents, etc.) biodegradation, which permitted survival many works art for centuries hostile environments, such as tropical forest. have reproduced...
Maya Blue, an ancient nanostructured organic–inorganic hybrid material resulting from the attachment of indigo, a natural dye, to phyllosilicate clay, palygorskite, has received considerable attention late. Despite intensive research, several aspects remain unsolved, in particular nature indigo–palygorskite association. Recent results suggest that Blue pigment is complex system which different topological isomers various indigoid molecules attached palygorskite matrix coexist.
The crystal lattice of single-crystal silicon gives rise to anisotropic elasticity. stiffness and compliance coefficient matrix depend on orientation and, consequently, Young's modulus, the shear modulus Poisson's ratio as well. Computer codes (in Matlab Python) have been developed calculate these elasticity parameters for a in any orientation. These facilitate evaluation anisotropy effects applications such microelectronics, microelectromechanical systems X-ray optics. For mechanically bent...
This article presents the Monte Carlo simulation package McXtrace , intended for optimizing X-ray beam instrumentation and performing virtual experiments data analysis. The system shares a structure code base with popular neutron McStas is good complement to standard software SHADOW . open source, licensed under General Public License, does not require user have access any proprietary its operation. of described in detail, various examples are given showcase versatility procedure outline...
A new computer environment to perform simulations on synchrotron experiments has been designed. It performs ray-tracing using the popular code SHADOW. With this application one can define, in a very easy and elegant way, or several optical systems (beamlines) calculations of propagation X-ray beam through it. Many complementary tools supplementary improve extend functionality SHADOW deal with complex system optimization, including compound elements, iterative calculations, some sample...
XOP is a user-friendly computer environment for performing calculations of interest to the synchrotron radiation community. It provides codes for: i) modeling x-ray sources (e.g., sources, such as undulators and wigglers), ii) calculating characteristics optical elements (mirrors, filters, crystals, multilayers, etc.), iii) multipurpose data visualization analyses. The functionality can be extended with external plug-ins (extensions). We describe status including recent developments in...
The OH speciation of 18 palygorskite samples from various localities were evaluated by near infrared spectroscopy (NIR) and compared to the corresponding octahedral composition derived independent, single-particle analytical electron microscopy (AEM). NIR gives evidence for dioctahedral-like (AlAlOH, AlFe3+OH, Fe3+Fe3+OH) trioctahedral-like (Mg3OH) species. Therefore, can be approximated formula yMg5 Si8O20(OH)2·(1 - y)[xMg2Fe2·(1 x)Mg2Al2] Si8O20(OH)2, where x is Fe content dioctahedral...
A new method for beamline simulation combining ray-tracing and wavefront propagation is described. The `Hybrid Method' computes diffraction effects when the beam clipped by an aperture or mirror length can also simulate effect of figure errors in optical elements present. different spatial frequencies on image compared with SHADOW results pointing to limitations latter. code has been benchmarked against multi-electron version SRW one dimension show its validity case fully, partially...
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...
XOP (X-ray OPtics utilities) is a graphical user interface (GUI) to run computer programs that calculate basic information needed by synchrotron radiation beamline scientists and engineers. It can also be used as front end for specific codes or packages data analysis reduction (XAFS, surface crystallography, etc.). contains customized database optical atomic constants. has flexible design new applications may added. The capabilities of XOP, including those related simulations crystal...
Association of indigo to palygorskite and sepiolite phyllosilicates, forming Maya Blue-like systems, is studied by means electron microscopy, solid-state multinuclear magnetic resonance (1H−13C CP MAS, 27Al, 29Si NMR), visible infrared spectroscopies (ATR-FTIR, VIS), solid state electrochemistry. Combination such techniques suggest that Blue must be viewed as a complex polyfunctional organic−inorganic hybrid material in which different topological isomers dehydroindigo molecules, distributed...
Twenty sepiolites of known composition from different origins were analyzed to quantify the variability in structural parameters and its possible relationships with morphology. Morphology SEM analyses led classify into several groups, beyond two simple macroscopic or clay groups. X‑ray powder diffraction synchrotron light was used discuss a b cell nature cations occupancy octahedral shell. Rietveld refinement using ideal sepiolite model is performed on at temperatures: 225 °C (for...
X-ray crystal monochromators exposed to white-beam X-rays in third-generation synchrotron light sources are subject thermal deformations that must be minimized using an adequate cooling system. A new approach was used measure the shape profile and slope of several cryogenically cooled (liquid nitrogen) silicon as a function beam power situ under heat load. The method utilizes multiple angular scans across Bragg peak (rocking curve) at various vertical positions narrow-gap slit downstream...
The evolution of the hardware platforms, modernization software tools, access to codes a large number young people and popularization open source for scientific applications drove us design OASYS (ORange SYnchrotron Suite), completely new graphical environment modelling X-ray experiments. implemented architecture allows obtain not only an intuitive very-easy-to-use interface, but also provides high flexibility rapidity interactive simulations, making configuration changes quickly compare...
XOP (X-ray OPtics utilities) is a graphical user interface (GUI) created to execute several computer programs that calculate the basic information needed by synchrotron beamline scientist (designer or experimentalist). Typical examples of such calculations are: insertion device (undulator wiggler) spectral and angular distributions, mirror multilayer reflectivities, crystal diffraction profiles. All are provided under unified GUI, which greatly simplifies their execution. The optics...
Abstract Maya blue is a marvelous pigment with extraordinary properties. It was invented by the around VII–VIII century and used many Mesoamerican peoples in prehispanic times. made encapsulating natural indigo into an inorganic clay matrix of palygorskite. The palygorskite–indigo mixture becomes acid‐resistant when moderate thermal treatment applied. chemical reasons unusual stability exact mechanism interaction between are not well understood. We present Raman study different preparations...