Search Results

You searched for all publications:

with publication states 'Published (Approved)'

Search Again...

These results only include publications that have been reviewed and processed by Diamond Light Source. To also view papers that have not yet been processed click here.

You can use the folder icon under Actions to collate papers as required. You can then click on View Folder in the left-hand navigation to review and/or download your folder.

Exact matches
Related results

10 items found (0 items not approved), displaying all items.1

Instruments / Technical Area	Publication Details	Published
I21-Resonant Inelastic X-ray Scattering (RIXS)	I21: an advanced high-resolution resonant inelastic X-ray scattering beamline at Diamond Light Source Ke-Jin Zhou , Andrew Walters , Mirian Garcia-Fernandez , Thomas Rice , Matthew Hand , Abhishek Nag , Jiemin Li , Stefano Agrestini , Peter Garland , Hongchang Wang , Simon Alcock , Ioana Nistea , Brian Nutter , Nicholas Rubies , Giles Knap , Martin Gaughran , Fajin Yuan , Peter Chang , John Emmins , George Howell Journal Of Synchrotron Radiation 29 DOI: 10.1107/S1600577522000601 Open Access Show Abstract ▼ Abstract: The I21 beamline at Diamond Light Source is dedicated to advanced resonant inelastic X-ray scattering (RIXS) for probing charge, orbital, spin and lattice excitations in materials across condensed matter physics, applied sciences and chemistry. Both the beamline and the RIXS spectrometer employ divergent variable-line-spacing gratings covering a broad energy range of 280–3000 eV. A combined energy resolution of ∼35 meV (16 meV) is readily achieved at 930 eV (530 eV) owing to the optimized optics and the mechanics. Considerable efforts have been paid to the design of the entire beamline, particularly the implementation of the collection mirrors, to maximize the X-ray photon throughput. The continuous rotation of the spectrometer over 150° under ultra high vacuum and a cryogenic manipulator with six degrees of freedom allow accurate mappings of low-energy excitations from solid state materials in momentum space. Most importantly, the facility features a unique combination of the high energy resolution and the high photon throughput vital for advanced RIXS applications. Together with its stability and user friendliness, I21 has become one of the most sought after RIXS beamlines in the world.	Mar 2022
I11-High Resolution Powder Diffraction	Stepwise observation and quantification and mixed matrix membrane separation of CO2 within a hydroxy-decorated porous host Christopher G. Morris , Nicholas M. Jacques , Harry G. W. Godfrey , Tamoghna Mitra , Detlev Fritsch , Zhenzhong Lu , Claire Murray , Jonathan Potter , Tom M. Cobb , Fajin Yuan , Chiu C. Tang , Sihai Yang , Martin Schröder Chemical Science DOI: 10.1039/C6SC04343G Open Access Show Abstract ▼ Abstract: The identification of preferred binding domains within a host structure provides important insights into the function of materials. State-of-the-art reports mostly focus on crystallographic studies of empty and single component guest-loaded host structures to determine the location of guests. However, measurements of material properties (e.g., adsorption and breakthrough of substrates) are usually performed for a wide range of pressure (guest coverage) and/or using multi-component gas mixtures. Here we report the development of a multifunctional gas dosing system for use in X-ray powder diffraction studies on Beamline I11 at Diamond Light Source. This facility is fully automated and enables in situ crystallographic studies of host structures under (i) unlimited target gas loadings and (ii) loading of multi-component gas mixtures. A proof-of-concept study was conducted on a hydroxyl-decorated porous material MFM-300(VIII) under (i) five different CO2 pressures covering the isotherm range and (ii) the loading of equimolar mixtures of CO2/N2. The study has successfully captured the structural dynamics underpinning CO2 uptake as a function of surface coverage. Moreover, MFM-300(VIII) was incorporated in a mixed matrix membrane (MMM) with PIM-1 in order to evaluate the CO2/N2 separation potential of this material. Gas permeation measurements on the MMM show a great improvement over the bare PIM-1 polymer for CO2/N2 separation based on the ideal selectivity.	Feb 2017
I12-JEEP: Joint Engineering, Environmental and Processing	I12: the Joint Engineering, Environment and Processing (JEEP) beamline at Diamond Light Source Michael Drakopoulos , Thomas Connolley , Christina Reinhard , Robert Atwood , Oxana Magdysyuk , Nghia Vo , Mike Hart , Leigh Connor , Bob Humphreys , George Howell , Steve Davies , Tim Hill , Guy Wilkin , Ulrik Pedersen , Andrew Foster , Nicoletta De Maio , Mark Basham , Fajin Yuan , Kaz Wanelik Journal Of Synchrotron Radiation 22 DOI: 10.1107/S1600577515003513 PMID: 25931103 Open Access Show Abstract ▼ Abstract: I12 is the Joint Engineering, Environmental and Processing (JEEP) beamline, constructed during Phase II of the Diamond Light Source. I12 is located on a short (5 m) straight section of the Diamond storage ring and uses a 4.2 T superconducting wiggler to provide polychromatic and monochromatic X-rays in the energy range 50150 keV. The beam energy enables good penetration through large or dense samples, combined with a large beam size (1 mrad horizontally x 0.3 mrad vertically). The beam characteristics permit the study of materials and processes inside environmental chambers without unacceptable attenuation of the beam and without the need to use sample sizes which are atypically small for the process under study. X-ray techniques available to users are radiography, tomography, energy-dispersive diffraction, monochromatic and white-beam two-dimensional diffraction/scattering and small-angle X-ray scattering. Since commencing operations in November 2009, I12 has established a broad user community in materials science and processing, chemical processing, biomedical engineering, civil engineering, environmental science, palaeontology and physics.	May 2015
I11-High Resolution Powder Diffraction	Dynamic strain propagation in nanoparticulate zirconia refractory Morgan E. Jones , Stephen Fearn , Rudolf Winter , Fajin Yuan , Alistair Lennie , Julia Parker , Stephen Thompson , Chiu Tang Journal Of Applied Crystallography 48, 386-392 DOI: 10.1107/S1600576715002393 Diamond Proposal Number(s): [6327, 8143, 9852] Show Abstract ▼ Abstract: Residual and intrinsic strains in granular materials have been studied extensively. However, understanding the dynamic strains that cause these resultant residual strains is key to developing better strain-resistant materials. This investigation demonstrates a method for characterizing dynamic strain propagation in granular materials. The specimen is a zirconia-based refractory composed of sol–gel-derived zirconia nanoparticles in a potassium silicate glass binder. In situ synchrotron X-ray powder diffraction in flat-plate geometry is used to characterize the sample structure on timescales of the order of 1 ms. A 125 W CO2 laser is used to strain the sample with a 25 ms pulse length. To compensate for the poor flux on this timescale, a pump–probe method is repeated 1000 times and the resulting data are subsequently re-binned to improve statistics. A Gaussian weighting function is also used to introduce better contrast between strained and unstrained frames. TOPAS Academic is used for fitting with a Le Bail model in `batch mode'. Lattice parameters and sample height are refined during fitting, along with a Lorentzian line width for extracting microstrain broadening. Microstrains, ∊, in the range of 1.01 < ∊ < 1.46% are reported on a 1 ms timescale.	Apr 2015
I11-High Resolution Powder Diffraction	Simultaneous measurement of X-ray powder diffraction and ferroelectric polarisation data as a function of applied electric field at a range of frequencies Steph Ryding , Robert Cernik , Jenny Wooldridge , Timothy Burnett , Mark Stewart , Carlo Vecchini , Markys Cain , Alistair Lennie , Fajin Yuan , Chiu Tang , Paul Thompson Powder Diffraction 28, S220 - S227 DOI: 10.1017/S0885715613001024 Show Abstract ▼ Abstract: A variable frequency ferroelectric polarisation measurement system has been designed and built at the UK's Diamond Light Source. The electric field induced phase transitions in Pb(Zr1-xTix)O3 (PZT) have been used to test the facility via in-situ measurements of electric polarisation and XRD. Stroboscopic and real time data collection methods on polycrystalline samples were employed as a function of frequency to determine the dynamic ferroelectric response. The system has been shown to deliver XRD patterns of good statistical quality measured over 40 points of a ferroelectric PE loop. The system is now available on station I11 as a user facility at the Diamond Light Source.	Sep 2013
I06-Nanoscience (XPEEM) Optics	High-precision soft x-ray polarimeter at Diamond Light Source Hongchang Wang , Sarnjeet Dhesi , Francesco Maccherozzi , Stuart Cavill , Emma Shepherd , Fajin Yuan , Rushi Deshmukh , Stewart Scott , Gerrit Van Der Laan , Kawal Sawhney Review Of Scientific Instruments 82 (12) DOI: 10.1063/1.3665928 PMID: 22225209 Show Abstract ▼ Abstract: The development and performance of a high-precision polarimeter for the polarization analysis in the soft x-ray region is presented. This versatile, high-vacuum compatible instrument is supported on a hexapod to simplify the alignment with a resolution less than 5 ?rad, and can be moved with its own independent control system easily between different beamlines and synchrotron facilities. The polarimeter can also be used for the characterization of reflection and transmission properties of optical elements. A W/B4C multilayer phase retarder was used to characterize the polarization state up to 1200 eV. A fast and accurate alignment procedure was developed, and complete polarization analysis of the APPLE II undulator at 712 eV has been performed.	Dec 2011
Controls	Recent developments in synchronized motion control at Diamond light source Brian Nutter , Tom Cobb , Matthew Pearson , Nick Rees , Fajin Yuan ICALEPCS 2011 Show Abstract ▼ Abstract: At Diamond Light Source the Experimental Physics and Industrial Control System (EPICS) is used with a variety of motion controllers. The use of EPICS ensures a common interface over a range of motorized applications. We have developed a system to enable the use of the same interface for synchronized motion over multiple axes using the Delta Tau Programmable Multi Axis Controller (PMAC). Details of this work will be presented, along with an example and possible future developments.	Oct 2011
I11-High Resolution Powder Diffraction	Fast X-ray powder diffraction on I11 at Diamond S. P. Thompson , J. E. Parker , J. Marchal , J. Potter , A. Birt , F. Yuan , R. D. Fearn , A. R. Lennie , Steven R. Street , C. C. Tang Journal Of Synchrotron Radiation 18 (4), 637-648 DOI: 10.1107/S0909049511013641 PMID: 21685682 Show Abstract ▼ Abstract: The commissioning and performance characterization of a position-sensitive detector designed for fast X-ray powder diffraction experiments on beamline I11 at Diamond Light Source are described. The detecting elements comprise 18 detector-readout modules of MYTHEN-II silicon strip technology tiled to provide 90° coverage in 2[theta]. The modules are located in a rigid housing custom designed at Diamond with control of the device fully integrated into the beamline data acquisition environment. The detector is mounted on the I11 three-circle powder diffractometer to provide an intrinsic resolution of [Delta]2[theta] [asymptotically equal to] 0.004°. The results of commissioning and performance measurements using reference samples (Si and AgI) are presented, along with new results from scientific experiments selected to demonstrate the suitability of this facility for powder diffraction experiments where conventional angle scanning is too slow to capture rapid structural changes. The real-time dehydrogenation of MgH2, a potential hydrogen storage compound, is investigated along with ultrafast high-throughput measurements to determine the crystallite quality of different samples of the metastable carbonate phase vaterite (CaCO3) precipitated and stabilized in the presence of amino acid molecules in a biomimetic synthesis process.	May 2011
I11-High Resolution Powder Diffraction	High-throughput powder diffraction on beamline I11 at Diamond Julia E. Parker , Stephen P. Thompson , Tom M. Cobb , Fajin Yuan , Jonathan Potter , Alistair R. Lennie , Sam Alexander , Christopher J. Tighe , Jawwad A. Darr , Jeremy C. Cockcroft , Chiu C. Tang Journal Of Applied Crystallography 44 (1), 102-110 DOI: 10.1107/S0021889810044948 Show Abstract ▼ Abstract: A new capability designed for high-throughput (HT) structural analysis using the synchrotron powder diffraction beamline (I11) at Diamond Light Source is reported. With a high-brightness X-ray beam, multi-analyser detectors and fast data-acquisition procedures, high-quality diffraction data can be collected at a speed of ~15-30 min per powder pattern for good crystalline materials. Fast sample changing at a rate of a few seconds per specimen is achieved with a robotic arm and pre-loaded capillary specimens on a multi-tray carousel (200-sample capacity). Additional equipment, such as an automatic powder-loading machine and a pre-alignment jig for the sample capillaries, is available to reduce preparation time. For demonstration purposes, the first results presented here are those from standard reference powders of Si, TiO2 and TiO2/Si mixtures, obtained by analysing the data using Le Bail (instrumental calibration) and Rietveld refinements (quantitative agreement within 1%). The HT hardware was then used to study the structural phase evolution of a library of 31 La4Ni3-xFexO10 heterometallic ceramic powders in less than 1 d. The powders were generated from a single heat treatment (at 1348 K in air for 12 h) of nanoceramic oxide co-precipitate precursors, made using a newly developed HT synthesis robot. Crystallographic details (symmetry and lattice parameters) were obtained as a function of Fe concentration. The results revealed that this approach was able to produce a pure Ruddlesden-Popper-type phase with an iron content of up to x = 0.5, significantly higher than has been achieved previously using more conventional synthesis routes and thus demonstrating the power of using the HT approach.	Feb 2011
I11-High Resolution Powder Diffraction	Beamline I11 at Diamond: A new instrument for high resolution powder diffraction J. Potter , T. P. Hill , A. Birt , F. Yuan , J. Parker , Chiu C. Tang , S. P. Thompson , T. M. Cobb Review Of Scientific Instruments 80 (7) DOI: 10.1063/1.3167217 PMID: 19655981 Show Abstract ▼ Abstract: The performance characteristics of a new synchrotron x-ray powder diffraction beamline (I11) at the Diamond Light Source are presented. Using an in-vacuum undulator for photon production and deploying simple x-ray optics centered around a double-crystal monochromator and a pair of harmonic rejection mirrors, a high brightness and low bandpass x-ray beam is delivered at the sample. To provide fast data collection, 45 Si(111) analyzing crystals and detectors are installed onto a large and high precision diffractometer. High resolution powder diffraction data from standard reference materials of Si, alpha-quartz, and LaB(6) are used to characterize instrumental performance.	Jul 2009

Publications Database

Search Results

You searched for all publications:

Search Again...

Subject Areas (check all that apply) select all

Instruments used to collect data (check all that apply) select all

Collaborations involved (check all that apply) select all

Diamond Offline Facilities used

Relevant Technical Areas (check all that apply) select all

Menu for Anonymous User