| Paper | Title | Page |
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| TUPMB001 | Magnets for the ESRF-EBS Project | 1096 |
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| A major upgrade project known as ESRF-EBS, Extremely Brilliant Source is planned at the European Synchrotron Radiation Facility (ESRF) in the coming years. A new storage ring will be built, aiming to decrease the horizontal emittance and to improve the brilliance and coherence of the X-ray beams. The lattice of the new storage ring relies on magnets with demanding specifications: dipoles with longitudinal gradient (field ranging from 0.17 T up to 0.67 T), strong quadrupoles (up to 90 T/m), combined function dipole-quadrupoles with high gradient (0.57 T and 37 T/m), strong sextupoles and octupoles. The design of these magnets is based on innovative solutions; in particular, the longitudinal gradient dipoles are permanent magnets and the combined dipole-quadrupoles are single-sided devices. The design of the magnets is finished and prototypes of innovative magnets have been built. The procurement of the magnets has started. Call for Tenders have been sent to a pre-qualified short list of magnet manufacturers. The longitudinal gradient dipoles will be assembled and measured in house. The design of the magnets, the prototype results and procurement status will be presented. | ||
| DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMB001 | |
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| TUPOR001 | Lifetime Improvements with a Harmonic RF System for the ESRF EBS | 1644 |
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| A third-harmonic RF system to increase the Touschek lifetime is under study for the European Synchrotron Radiation Facility (ESRF) Extremely Brilliant Source (EBS) storage ring, in particular for modes with high current per bunch. Multi-particle simulations have been done to study the bunch lengthening and shape in presence of inductive impedance and a third-harmonic RF system. | ||
| DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOR001 | |
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| WEPOW005 | Updates on Lattice Modeling and Tuning for the ESRF-EBS Lattice. | 2818 |
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| The ESRF-EBS lattice model is updated to include the effect of magnetic lengths in dipoles, quadrupoles, sextupoles and combined function magnets. The effect of this modification and the updates to the injection cell are considered with particular focus on injection efficiency and Touschek lifetime. The solutions to introduce new sources of radiation suitable for the existing bending magnet radiation beamlines are also presented. | ||
| DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW005 | |
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| WEPOW006 | Hybrid Multi Bend Achromat at 3 GeV for Future 4th Generation Light Sources | 2822 |
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| Starting from the Hybrid Multi Bend Achromat (HMBA) lattice designed for the 6GeV ESRF-EBS we rescale the lattice energy to 3GeV and optimize the lattice parameters to achieve dynamic apertures sufficient for injection and lifetimes of more than 7h without errors. The rescaling results to an emittance of roughly 140pmrad. Further optimizations of bending magnets longitudinal gradient, optics and sextupole fields show the possibility to further decrease emittance and increase the DA and lifetime. A comparison with other lattice designs is also presented. | ||
| DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW006 | |
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| THPMB045 | Comparison of Optics Measurement Methods in ESRF | 3343 |
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| The N-BPM and the Amplitude methods, which are used in the LHC for beam optics measurement, were applied to the ESRF storage ring. We compare the results to the Orbit Response Matrix (ORM) method that is routinely used in the ESRF. These techniques are conceptually different since the ORM is based on the orbit response upon strength variation of steering magnets while the LHC techniques rely on the harmonic analysis of turn-by-turn position excited by a kicker or an AC dipole. Finally, we compare these methods and show the differences in their performance in the ESRF environment. | ||
| DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMB045 | |
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| THPMR015 | RCDS Optimizations for the ESRF Storage Ring | 3420 |
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The Robust Conjugate Direction Search (RCDS)* optimizer is applied for online optimizations of the ESRF accelerators. This paper presents the successful application of the algorithm in reducing vertical emittance, improving injection efficiency and increasing lifetime. A new set of sextupole settings to increase chromaticity has been obtained with lifetimes comparable to the existing one. This allows to run with double current in a single bunch, and unifies the optics for few bunch (except 4x10 bunches) and multi-bunch modes.
* X. Huang, J. Corbett, J. Safranek, J. Wu, "An algorithm for online optimization of accelerators", Nucl. Instr. Methods, A 726 (2013) 77-83. |
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| DOI • | reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR015 | |
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