| Paper | Title | Page |
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| TUCA06 | The Girders System for the New ESRF Storage Ring | 147 |
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| The ESRF is proceeding with the design and procurement of its new low emittance storage ring (Extremely Brilliant Source project). This completely new storage ring requires a high performance support system, providing high stability (first resonance frequency about 50Hz) and a precise alignment capability (50µm, manual in transverse direction and motorized in the vertical one). In order to meet these requirements we decided to support the magnets of each of the 32 cells of the synchrotron with four identical girders that was considered the best compromise between cost, complexity and performances. Each of the resulting 128 girders is 5.1m long, carries about seven tons of magnets, and its weight including fixed basement and adjusting system is six tons. The adjustment system relies on modified commercial wedges; their stiffness was evaluated through laboratory tests. The FEA calculations carried out to optimize the design will be presented, together with the results obtained on a complete prototype girder system which was built and extensively tested and confirmed the modal calculations. | ||
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Slides TUCA06 [17.229 MB] | |
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUCA06 | |
| About • | paper received ※ 07 September 2016 paper accepted ※ 19 September 2016 issue date ※ 22 June 2017 | |
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TUPE30 |
Design of the Straight Sections of the EBS Storage Ring | |
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| The new lattice will require the complete substitution of the 32 arcs of the storage ring by a new hybrid multi-bend achromat. The length of the straight sections will be 5m. This new lattice results in different geometrical characteristics that require a new design of all transitions chambers, photon absorbers, in-vacuum undulators and also adjustment of the insertion device layout for existing sections longer than 5m. The Radiofrequency straight sections are also upgraded by replacing existing 5-cells cavities with single cell HOM damped cavities. | ||
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WEAA01 |
The ESRF Accelerator Upgrade: Overview, Technical Challenges and Solutions in the Engineering Design | |
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An engineering overview of the ESRF Extremely Brilliant Source (EBS) project will be presented. The ESRF EBS consists of replacing the current double-bend achromat storage ring by a new ring based on a 7-bend achromat lattice. This will enable a reduction of the electron beam horizontal emittance by a factor of 30 (140pm horizontal emittance) and an increase of the brilliance and coherence of the photon beam. As a consequence, the storage ring stability (vibrational and thermal) is of major importance, which implies specific design issues. The engineering design of standard cell components is now completed, some prototypes have been built and most of the large procurement contracts have been placed with the objective to pre-assemble equipped girders from mid 2017 and install them from beginning 2019. After introducing the context and the expected gain from the new storage ring, this talk will focus on the main technical challenges and present the mechanical design solutions adopted for the magnets and other strategic components *. This presentation is given on behalf of the ESRF EBS engineering team.
* See also in MEDSI 2016 specific presentations on EBS Girders, X-Ray absorbers, Chambers & RF fingers, Injection zone, RF & straight sections, Thermal effects. |
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Slides WEAA01 [7.541 MB] | |
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WECA02 |
ESRF EBS Project: Vacuum Chambers and RF Fingers | |
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| The ESRF - EBS new lattice implies a high level of requirement for all components. This talk will focus on the mechanical design solutions adopted for the chambers to fulfil the geometrical, thermal, vacuum and RF requirements. The main challenges are the small distance between the poles of the magnets, the small distance between the magnets and the impedance budget. In that respect the novel design of the vacuum chambers and the RF fingers will be presented. | ||
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Slides WECA02 [8.981 MB] | |
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