Mechanical Engineering
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Abstract: Tests were performed to assess the feasibility of bonding single crystal silicon to copper and aluminium nitride. The application of the bonded component is in a cryocooled monochromator for synchrotron X-ray optics. Aluminium, gold and indium–silver interlayers were tried. Some bonded components were tested by immersion in liquid nitrogen to simulate cooling of the component in service. Although bonds could be formed, they were of insufficient integrity for use in a challenging cryogenic application.
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Jan 2009
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Mechanical Engineering
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Abstract: Continuous vibration monitoring is carried out and the stability of the Diamond floor slab has been assessed with regard to how it has responded to various external stimuli. Data has been collected on weather conditions and comparisons made at extremes with floor vibration. The impact of a high level walkway bridge on the hall floor has also been assessed and there was a unique opportunity for an operational facility to measure the vibration response during a complete power blackout. The impact of local construction work is also presented.
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Jun 2008
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Mechanical Engineering
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Abstract: Floor stability spoecification; civil engineering, design and construction; description of the HLS system;
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Jun 2008
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Mechanical Engineering
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Jun 2008
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Mechanical Engineering
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Abstract: A superconducting magnet was designed based on the requirements of high magnetic field nuclear magnetic resonance. The superconducting coils are fabricated with the various diameters of superconducting wire to improve the performance and reduce the weight in the magnet. The superconducting magnet with the available-bore of phi 54 mm and center field of 11.75 T is cooled by the liquid helium. To reduce the liquid helium evaporation, a two-stage 4 K pulsed tube refrigerator is employed to cool the system. The actively shielded magnet has a high pure copper quench band to reduce stray field burst during a quench of the shield superconducting coil. The paper presents the electromagnetic design, and stress and protection in detail.
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Jan 2010
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Mechanical Engineering
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Abstract: Diamond is a 3GeV, 3rd Generation Synchrotron Light Source currently under construction on the Harwell Science and Innovation Campus, Chilton, Oxfordshire. This paper describes the three different types of Front end that have been designed to transmit the intense synchrotron radiation generated by the Undulator, Multi- Pole Wiggler and Bending Magnet sources in the Diamond storage ring to the experiments. The functions of the main components and their location in the layout are described. The Finite Element Analysis (FEA) that has been carried out to verify the performance under the high heat loads generated by Diamond is also described along with the limits on temperature and stress that have been employed in the design.
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Jun 2006
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Mechanical Engineering
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Abstract: Diamond is a 3GeV, 3rd Generation Synchrotron Light Source currently under construction as part of the Harwell Science and Innovation Campus, Chilton, Oxfordshire. The 24 cell Diamond Storage Ring is 561.6m in circumference and is mounted on 72 support girders, the largest of which are 6m long and weigh 17 Tonnes. Each girder can be remotely positioned in 5 axes using a system of motorised cams. This system has been designed to enable the future remote realignment of the Storage Ring using beam based alignment techniques. The system is described in detail including the mechanical and electrical components of the system as well as a description of the alignment algorithms employed and how these have been incorporated into the control system.
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Jun 2006
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Mechanical Engineering
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Abstract: The main foot bridge provides access to linac, booster and storage ring facilities in the synchrotron of Diamond Light Source. The impact of the passage of pedestrian traffic and equipment across the bridge structure was noticeable to the site of beamlines below. One of them, I20, is the most sensitive beamline to such impact. The bridge obviously oscillated with even light traffic, and it was also assumed that this would couple to the storage ring structure where the bridge is mounted. The optics for beamline I20, for stability, stands directly on the slab within the I20 experimental area; this was however subject to excessive vibration transmitted by foot traffic from the overhead footbridge producing a vibration on the experimental floor of 86 nm whereas elsewhere in the experimental hall experiences only about 20 nm, demonstrating a four times increase in vibration caused by the pedestrian bridge. Vibration measurements on the ground underneath the bridge and finite element analyses clearly show that frequencies of 2 and 5 Hz were caused by the bridge and traffic on it. Several remedies were proposed. However, dampers will only damp out vibrations of around 5–6 Hz but not to damp out 2 Hz, which is caused directly by human foot steps. After investigation of cost and effectiveness and several vibration tests conducted, a compromise with extra propping at the mid-span of the bridge was eventually selected. Such reinforcement has been now implemented. The 5 Hz frequency has been successfully removed and a amplitude of 2 Hz also considerably reduced.
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Oct 2011
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Mechanical Engineering
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Abstract: Circular dichroism (CD) is the differential absorption of left- and right-handed circularly polarized light. It is a form of spectroscopy used to determine the optical isomerism and secondary structure of molecules, and to study a wide variety of chiral materials in solution, particularly biologically important molecules such as proteins, nucleic acids, carbohydrates, lipids and drugs. The benefit of carrying out such experiments using synchrotron radiation is that the light available is several orders of magnitude higher in intensity than that available using conventional CD instruments, thereby providing a much higher signal-to-noise ratio over a wide wavelength range (140-700 nm). This paper will detail the development of a technique for rapidly producing 3D printed microfluidic channels in transparent polymer flow cells that enables the rapid and low-cost evaluation and iteration of microfluidic channel geometries. Permitting the flow through novel microfluidic devices to be interrogated thoroughly and the design optimized prior to making the significant financial and most crucially time commitment to the UV compatible flow cell for presentation to the synchrotron.
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Jun 2015
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Mechanical Engineering
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Open Access
Abstract: Beamline I24 at Diamond Light Source is a tuneable microfocus macromolecular crystallography beamline that has been in user operation since 2009. Upcoming upgrades to the beamline will result in a reduction of the beamsize from 8 x 8 µm to 3 x 4 µm. This together with the recent installation of a Pilatus-3 6M capable of data collection at 100 Hz necessitates the need for an upgrade to the current endstation. Furthermore, there is a growing demand from users to reduce the current downtime when switching between in situ and cryo-crystallography experiments. A unique two-goniometer design of the new endstation will facilitate this. This paper covers the design of the new endstation, preliminary measurements of the sphere of confusion of the vertical goniometer subassembly and the resolving power of the new on-axis viewing system.
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Oct 2014
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