| Paper | Title | Other Keywords | Page |
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| TUPH17 | Design Considerations Associated with the Replacement of a Sextupole Magnet by a Short Wiggler in a Cell of the Diamond Storage Ring Lattice | storage-ring, sextupole, dipole, photon | 63 |
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Now that all of the original straight sections in the Diamond storage ring are occupied, novel ways of converting bending magnet beamline locations into insertion device beamlines have been considered. Recently one cell of the 24 cells was reconfigured in to a Double-Double Bend Achromat (DDBA) to provide a new location for an Undulator and enable a formerly designated bending magnet beamline to become an Insertion Device Beamline*. Extending this concept for the new Dual Imaging and Diffraction (DIAD) Beamline proved to have a strong impact on lifetime and injection efficiency, so instead it was decided to remove a Sextupole magnet in one cell and substitute it with a short fixed gap Wiggler. The accelerator physics, mechanical and electrical design aspects associated with the change are described.
* Mechanical Engineering solutions for the Diamond DDBA Project, J Kay, MEDSI 2014 |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH17 | ||
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| TUPH24 | Front End of Dual Imaging and Diffraction Beamline at Diamond Light Source | dipole, radiation, storage-ring, optics | 81 |
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| The Dual Imaging and Diffraction (DIAD) beamline X-ray source is a ten pole mini wiggler. By locating the mini wiggler in place of an existing sextupole magnet, the DIAD beamline is built at a bending magnet beamline position in Diamond. To accommodate the unusual beam trajectory, a new front end was designed for the DIAD beamline. The particular designs and specifications including an improved front end slits design, as well as the synchrotron and dipole ray tracing of the front end are presented in this paper. The development process of delivering the front end - the project challenges, approach and activities are also described along with the technical challenges. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH24 | ||
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| WEPH01 | Evaluation of Anisotropic Simulations & Redesign of the BXDS High Energy Monochromator Bent Laue Diffraction Crystal Holders | focusing, simulation, instrumentation, radiation | 199 |
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| The Brockhouse X-ray Diffraction and Scattering Sector (BXDS) High-Energy (HE) beamline includes a bent Laue diffraction monochromator. The BXDS HE monochromator achieves energy ranges of 35keV to 90 keV through the bent Laue diffraction of two silicon crystal wafers. Each wafer (460um & 1000um thick) is bent to achieve specific sagittal radius (Rs); subsequent anticlastic meridional radius (Rm) results from the anisotropic nature of silicon, creating the desired x-ray focusing parameters. During the initial conditioning of the BXDS HE monochromator spurious diffraction patterns were observed indicating that the crystal holder, and crystal integrity failed. Alternative holder designs were evaluated using Finite Element Analysis (FEA; ANSYS) simulations to ensure that appropriate Rs and Rm values were achieved, verification of the crystal holder Rs was completed using contact 3D measurement (FaroArm), and the crystal surface was assessed using 3D optical profiling (Zygo). A superior holder was chosen based on the results, and replaced. The performance of the BXDS HE monochromator has been characterized, indicating the new holder design has achieved x-ray focusing parameters. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH01 | ||
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| WEPH02 | Thermomechanical Analysis of SESAME High-Heat-Load Front Ends Components | simulation, radiation, synchrotron, dipole | 202 |
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New front end beamline components at SESAME* are designed to handle the high heat load produced by the insertion devices. A mini gap wiggler will be installed for the Material science Beamline and the front end will receive 5.0 kW of total power and 7.74 kW/mrad2 of peak power density. The power produced by the insertion device was simulated using SynRad+, this software is using Monte Carlo simulation to simulate the synchrotron radiation from either an insertion device or any magnet source, the surface power density distribution generated by this software mapped directly to an FEA software to conduct a coupled thermo-mechanical analsys. The design, modeling, power source simulation and FEA analysis of the fixed mask, shutter and filter for the material science Beamline front end will be presented in this paper
Synchrotron-light for Experimental Science and Applications in the Middle East |
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Poster WEPH02 [0.939 MB] | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH02 | ||
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| THPH33 | Direct LN2 Cooled Double Crystal Monochromator | cryogenics, vacuum, radiation, damping | 406 |
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| A liquid-nitrogen-cooled (LN) X-ray double crystal monochromator has been designed and built for the high power load damping wiggler beamline of the NSLS2. It was designed as the direct LN first crystal to dissipate the max heat load of 2 kW and the second is in-direct-braid LN. It is designed to operate for beam energy 5 to 36 keV with fixed exit beam mode, and for QEXAFS compatible with channel cut mode. It is designed to rotate the Bragg axis with using AC servo motor and achieve up to 10 Hz scan. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH33 | ||
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| THPH41 | Frontend Slits for Closely-Spaced Wiggler Beams | vacuum, operation, controls, scattering | 424 |
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| A high energy x-ray (HEX) beamline facility will be constructed at NSLS-II for R&D in energy storage tech-nologies using different x-ray imaging techniques. A 4.3 Tesla superconducting wiggler will be used to produced x-rays of total power of approximately 56 kW in 8 keV ' 200 keV range. The nominal horizontal fan of ~ 10 mrad will be split into three closely spaced beams of 0.2 mrad, 1.0 mrad and 0.2 mrad fans. Each beam is required to have a frontend slit with four distinct apertures. The conventional L-shape design of the slit is not feasible for these closely spaced beams because of constraints on side cooling and horizontal travel of the slits. In this paper we propose two solutions for these slits using a beam pass-through design, vertical-only travel and optimized cooling configurations. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH41 | ||
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