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Instruments / Technical Area	Publication Details	Published
Mechanical Engineering	A new procurement strategy to challenge the supplier constraints created when using a fully developed reference design G. E. Howell , N. Baker , S. Davies , M. Garcia-fernandez , H. C. Huang , S. M. Scott , A. Walters , K. Zhou MEDSI2018 DOI: 10.18429/JACoW-MEDSI2018-THOPMA04 Open Access Show Abstract ▼ Abstract: A common procurement strategy is to produce a fully optimised reference design that makes assumptions about the manufacturing process and supplier capability. This approach can restrict the opportunities for some companies to include their own specialist manufacturing capability to provide a more effective and cost efficient solution. A new approach is suggested following the recent experience at Diamond Light Source. The manufacture of high stiffness welded fabrications up to 13m in length for the I21 RIXS Spectrometer is used as an example. The I21 RIXS Spectrometer design was optimised for stiffness and control of vibration. The use of Finite Element Analysis enabled different design options and compromises to be explored utilising the supplier's capabilities. The final design was tested during manufacture to verify the FEA model. With the I21 RIXS Spectrometer commissioned the data collected shows the final stability performance of the system including detector stability over full experiment durations has met the scientific goals of the design.	Dec 2018
I16-Materials and Magnetism	Direct observation of electron density reconstruction at the metal-insulator transition in NaOs O 3 N. Gurung , N. Leo , S. P. Collins , G. Nisbet , G. Smolentsev , M. Garcia-fernandez , K. Yamaura , L. J. Heyderman , U. Staub , Y. Joly , D. D. Khalyavin , S. W. Lovesey , V. Scagnoli Physical Review B 98 DOI: 10.1103/PhysRevB.98.115116 Diamond Proposal Number(s): [12459, 14853] Show Abstract ▼ Abstract: The 5d transition-metal oxides offer further opportunities to test our understanding of the interplay of correlation effects and spin-orbit interactions in materials in the absence of a single dominant interaction. The subtle balance between solid-state interactions can result in mechanisms that minimize the interaction energy, and in material properties of potential use for applications. We focus here on the 5d transition-metal oxide NaOsO3, a strong candidate for the realization of a magnetically driven transition from a metallic to an insulating state exploiting the so-called Slater mechanism. Experimental results are derived from nonresonant and resonant x-ray single-crystal diffraction at the Os L edges. A change in the crystallographic symmetry does not accompany the metal-insulator transition in the Slater mechanism and, indeed, we find no evidence of such a change in NaOsO3. An equally important experimental observation is the emergence of the (300) Bragg peak in the resonant condition with the onset of magnetic order. The intensity of this space-group-forbidden Bragg peak continuously increases with decreasing temperature in line with the square of intensity observed for an allowed magnetic Bragg peak. Our main experimental results, the absence of crystal symmetry breaking, and the emergence of a space-group-forbidden Bragg peak with developing magnetic order, support the use of the Slater mechanism to interpret the metal-insulator transition in NaOsO3. We successfully describe our experimental results with simulations of the electronic structure and with an atomic model based on the established symmetry of the crystal and magnetic structure.	Sep 2018
I13-1-Coherence Data acquisition Insertion Devices	Transmission x-ray microscopy at Diamond-Manchester I13 Imaging Branchline Joan Vila-comamala , Jeroen Bosgra , David S. Eastwood , Ulrich Wagner , Andrew Bodey , Miryam Garcia-fernandez , Christian David , Christoph Rau Null XRM 2014: Proceedings of the 12th International Conference on X-Ray Microscopy DOI: 10.1063/1.4937530 Show Abstract ▼ Abstract: Full-field Transmission X-ray Microscopy (TXM) has been shown to be a powerful method for obtaining quantitative internal structural and chemical information from materials at the nanoscale. The installation of a Full-field TXM station will extend the current microtomographic capabilities of the Diamond-Manchester I13 Imaging Branchline at Diamond Light Source (UK) into the sub-100 nm spatial resolution range using photon energies from 8 to 14 keV. The dedicated Full-field TXM station will be built in-house with contributions of Diamond Light Source support divisions and via collaboration with the X-ray Optics Group of Paul Scherrer Institut (Switzerland) which will develop state-of-the-art diffractive X-ray optical elements. Preliminary results of the I13 Full-field TXM station are shown. The Full-field TXM will become an important Diamond Light Source direct imaging asset for material science, energy science and biology at the nanoscale.	Jan 2016
I13-2-Diamond Manchester Imaging	Synchrotron X-ray Microtomography at the Diamond-Manchester Imaging Branchline I13-2 of Diamond Light Source Andrew Bodey , Joan Vila-comamala , Ulrich Wagner , Mirian Garcia-fernandez , Aaron Parsons , Christoph Rau Bruker microCT User Meeting 2015 Open Access	May 2015
Theoretical Physics	Parity- and time-odd atomic multipoles in magnetoelectric GaFeO3 as seen via soft x-ray Bragg diffraction U. Staub , Y. Bodenthin , C. Piamonteze , M. Garcia-fernandez , V. Scagnoli , M. Garganourakis , S. Koohpayeh , D. Fort , S. Lovesey Physical Review B 80 (14), 140410 DOI: 10.1103/PhysRevB.80.140410 Show Abstract ▼ Abstract: We present resonant soft x-ray Bragg diffraction data on the space-group forbidden (010) reflection at the Fe L-2,L-3 edges of magnetoelectric GaFeO3. Observed intensities give direct evidence for strange atomic multi-poles that violate both time and space inversion, in particular a magnetoelectric quadrupole. The discovery of magnetoelectric multipoles in the open 3d shell is a direct measure of coupling between magnetic and electric properties and a basis to a microscopic understanding of magnetically induced multiferroics.	Oct 2009

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