scholarly journals The Dynamic Response of Polymers Interrogated by 3rd Generation X-ray Light Sources

2019 ◽  
Author(s):  
Andrew Abbott ◽  
Brittany Branch ◽  
Eric N. Brown ◽  
Carl A. Carlson ◽  
Bradford E. Clements ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Generation X ◽  
Light Sources ◽  
X Ray

Few-femtosecond timing at fourth-generation X-ray light sources

2011 ◽  
Vol 5 (3) ◽  
pp. 162-165 ◽  
Author(s):  
F. Tavella ◽  
N. Stojanovic ◽  
G. Geloni ◽  
M. Gensch
Keyword(s):  
Generation X ◽  
Fourth Generation ◽  
Light Sources ◽  
X Ray

scholarly journals Compact laser accelerators for X-ray phase-contrast imaging

2014 ◽  
Vol 372 (2010) ◽  
pp. 20130032 ◽  
Author(s):  
Z. Najmudin ◽  
S. Kneip ◽  
M. S. Bloom ◽  
S. P. D. Mangles ◽  
O. Chekhlov ◽  
...  
Keyword(s):  
Generation X ◽  
Phase Contrast ◽  
Electron Beams ◽  
Imaging Techniques ◽  
Phase Contrast Imaging ◽  
Fourth Generation ◽  
Light Sources ◽  
Contrast Imaging ◽  
Synchrotron Source ◽  
X Ray

Advances in X-ray imaging techniques have been driven by advances in novel X-ray sources. The latest fourth-generation X-ray sources can boast large photon fluxes at unprecedented brightness. However, the large size of these facilities means that these sources are not available for everyday applications. With advances in laser plasma acceleration, electron beams can now be generated at energies comparable to those used in light sources, but in university-sized laboratories. By making use of the strong transverse focusing of plasma accelerators, bright sources of betatron radiation have been produced. Here, we demonstrate phase-contrast imaging of a biological sample for the first time by radiation generated by GeV electron beams produced by a laser accelerator. The work was performed using a greater than 300 TW laser, which allowed the energy of the synchrotron source to be extended to the 10–100 keV range.

scholarly journals Light Sources in Europe—Case Study: The COMPACTLIGHT Collaboration

Instruments ◽  
2019 ◽  
Vol 3 (3) ◽  
pp. 43 ◽  
Author(s):  
Nikolaos Gazis ◽  
Eugene Tanke ◽  
Theodoros Apostolopoulos ◽  
Katerina Pramatari ◽  
Regina Alexandra Rochow-Carbone ◽  
...  
Keyword(s):  
Generation X ◽  
Free Electron Laser ◽  
European Region ◽  
Light Sources ◽  
Market Survey ◽  
X Ray ◽  
Funded Project ◽  
The Many ◽  
Conceptual Design Report

The light sources currently existing or under development in Europe address needs in the Central and Northwestern regions, whereas in the Southeastern European region there is no facility of this kind. The CompactLight collaboration, an H2020 funded project, is going to deliver a Conceptual Design Report (CDR) of a novel generation X-ray Free Electron Laser (XFEL) facility which is compact, innovative, relatively cheap and to be implemented for industrial and medical applications. The CDR will facilitate technological updates of the many European region institutions and enable them to construct a novel light source. Cost and risk analysis, as well as technology transfer and market survey of the project results are also discussed.

scholarly journals Binary Amplitude Reflection Gratings for X-ray Shearing and Hartmann Wavefront Sensors

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 536
Author(s):  
Kenneth A. Goldberg ◽  
Antoine Wojdyla ◽  
Diane Bryant
Keyword(s):  
Operating Conditions ◽  
Design Parameters ◽  
Wavefront Aberration ◽  
Light Sources ◽  
Wavefront Sensors ◽  
X Ray ◽  
New Class ◽  
Coherent Wave ◽  
Reflection Gratings ◽  
Dynamic Operating

New, high-coherent-flux X-ray beamlines at synchrotron and free-electron laser light sources rely on wavefront sensors to achieve and maintain optimal alignment under dynamic operating conditions. This includes feedback to adaptive X-ray optics. We describe the design and modeling of a new class of binary-amplitude reflective gratings for shearing interferometry and Hartmann wavefront sensing. Compact arrays of deeply etched gratings illuminated at glancing incidence can withstand higher power densities than transmission membranes and can be designed to operate across a broad range of photon energies with a fixed grating-to-detector distance. Coherent wave-propagation is used to study the energy bandwidth of individual elements in an array and to set the design parameters. We observe that shearing operates well over a ±10% bandwidth, while Hartmann can be extended to ±30% or more, in our configuration. We apply this methodology to the design of a wavefront sensor for a soft X-ray beamline operating from 230 eV to 1400 eV and model shearing and Hartmann tests in the presence of varying wavefront aberration types and magnitudes.

Microwave-Assisted Hydrothermal Synthesis of ZnFe2O4/TiO2 Composite and Photocatalytic Properties

2018 ◽  
Vol 788 ◽  
pp. 102-107
Author(s):  
Pavels Rodionovs ◽  
Jānis Grabis ◽  
Aija Krūmiņa
Keyword(s):  
Photocatalytic Activity ◽  
Photon Absorption ◽  
Light Sources ◽  
Mass Loading ◽  
Spherical Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Microwave Assisted ◽  
Average Size ◽  
Prepared Nanostructures

In order to improve TiO2 photocatalytic activity ZnFe2O4/TiO2 nanocomposites with different ZnFe2O4 mass loading were produced. Obtained ZnFe2O4 nanoparticles were coupled with TiO2 via microwave-assisted hydrothermal method in order to improve photon absorption in a range of visible light. Prepared nanostructures were characterized with scanning electron microscopy and X-ray diffraction. Photocatalytic activity of prepared samples was investigated by degradation of methylene blue under different light sources – LED, Hg and Osram Vitalux lamps. ZnFe2O4 consists of spherical nanoparticles with average size of 15 nm. TiO2 spherical nanoparticles size is in a range of 30÷45 nm. The results show that doping TiO2 with ZnFe2O4 nanoparticles increases photocatalytic activity. Photocatalytic activity increases as mass loading of ZnFe2O4 decreases.

scholarly journals Continuous scanning for Bragg coherent X-ray imaging

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Ni Li ◽  
Maxime Dupraz ◽  
Longfei Wu ◽  
Steven J. Leake ◽  
Andrea Resta ◽  
...  
Keyword(s):  
Flow Reactor ◽  
Light Sources ◽  
Pt Nanoparticle ◽  
Strain Fields ◽  
X Ray ◽  
Coherent Diffraction Imaging ◽  
Scan Time ◽  
X Ray Imaging ◽  
Continuous Scanning ◽  
Diffraction Imaging

Abstract We explore the use of continuous scanning during data acquisition for Bragg coherent diffraction imaging, i.e., where the sample is in continuous motion. The fidelity of continuous scanning Bragg coherent diffraction imaging is demonstrated on a single Pt nanoparticle in a flow reactor at $$400\,^\circ \hbox {C}$$ 400 ∘ C in an Ar-based gas flowed at 50 ml/min. We show a reduction of 30% in total scan time compared to conventional step-by-step scanning. The reconstructed Bragg electron density, phase, displacement and strain fields are in excellent agreement with the results obtained from conventional step-by-step scanning. Continuous scanning will allow to minimise sample instability under the beam and will become increasingly important at diffraction-limited storage ring light sources.

A scanning reflection X-ray microscope for magnetic imaging in the EUV range

2019 ◽  
Vol 26 (6) ◽  
pp. 2040-2049
Author(s):  
Andreas Schümmer ◽  
H.-Ch. Mertins ◽  
Claus Michael Schneider ◽  
Roman Adam ◽  
Stefan Trellenkamp ◽  
...  
Keyword(s):  
Kerr Effect ◽  
Magnetic Circular Dichroism ◽  
Thin Foil ◽  
Light Sources ◽  
Magnetic Domains ◽  
X Ray ◽  
Magnetic Imaging ◽  
Magnetic Dichroism ◽  
Magneto Optical Kerr Effect ◽  
Microscope Design

The mechanical setup of a novel scanning reflection X-ray microscope is presented. It is based on zone plate optics optimized for reflection mode in the EUV spectral range. The microscope can operate at synchrotron radiation beamlines as well as at laboratory-based plasma light sources. In contrast to established X-ray transmission microscopes that use thin foil samples, the new microscope design presented here allows the investigation of any type of bulk materials. Importantly, this permits the investigation of magnetic materials by employing experimental techniques based on X-ray magnetic circular dichroism, X-ray linear magnetic dichroism or the transversal magneto-optical Kerr effect (T-MOKE). The reliable functionality of the new microscope design has been demonstrated by T-MOKE microscopy spectra of Fe/Cr-wedge/Fe trilayer samples. The spectra were recorded at various photon energies across the Fe 3p edge revealing the orientation of magnetic domains in the sample.

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