| Paper | Title | Page |
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| TUPE29 | Integration of a Stripline Kicker Prototype for CLIC Project Into ALBA Storage Ring | 230 |
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| The Compact Linear Collider (CLIC) project is an international collaboration with CERN for developing a high-energy and high-luminosity machine which accelerates and collides electrons and positrons at energies up to several tera-electron volts. The extraction system for the Damping Rings of the CLIC shall follow very tight requirements in order to maintain the ultra-low emittance of the extracted bunches. A first prototype of the extraction kicker based on stripline technologies has been built and characterized at CERN without beam. The stripline chamber will be shortly installed in the ALBA Synchrotron to be tested under beam. In situ measurements of the impedance, transversal field homogeneity and flat-top ripple aims to complete its characterization. This contribution presents the design of the set up for the integration of the stripline chamber in one of the medium straight sections of ALBA storage ring. | ||
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Poster TUPE29 [4.469 MB] | |
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE29 | |
| About • | paper received ※ 09 September 2016 paper accepted ※ 15 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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| TUPE31 | Manufacturing of Photon Beam-Intercepting Components from CuCrZr | 233 |
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| Photon beam-intercepting components in synchrotron light sources have usually been made as water-cooled Glidcop bodies brazed to stainless steel conflate flanges. This fabrication method involves many manufacturing steps which result in increased cost, long procurement time and lower manufacturing reliability. A new design approach was recently proposed which simplifies fabrication by eliminating brazing and utilizes a readily available copper alloy, CuCrZr. This paper describes the manufacturing experience gained at NSLS-II from fabricating many components of this new design. Results of an investigation of various techniques for joining CuCrZr to itself and to SS304 and AL-6061 are also presented. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE31 | |
| About • | paper received ※ 09 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017 | |
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| TUPE32 | A Girder-Free Magnet Support System Design | 236 |
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| Magnet support systems for the new light sources are required to satisfy several rigorous performance specifications. The support system must be rigid so that its static deflection under its own weight and the combined weight of the magnets is small and repeatable. For vibration stability the lowest natural frequency of the magnet-support assembly should be greater than 50 Hz. To meet thermal stability requirements it is desirable to minimize bending deformation of the support system when subjected to temperature changes. In addition, the magnet support system should be easy to transport, easy to align, and cost effective. Altogether these requirements are difficult to satisfy, especially if the main structural component of the support system is a girder of length greater than 3 meters. In this paper we propose a magnet support system design consisting of column-type supports joined by removable C-beams. The column-type supports provide a superior stability performance without compromising the alignment capability. Analysis results are presented to characterize the performance of this support system. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE32 | |
| About • | paper received ※ 09 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017 | |
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| TUPE33 | NSLS-II Beam Aperture Slit Vibration Studies | 239 |
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| Beam aperture slits mounted on stepper-motor driven X-Y stages are used in NSLS-II frontends to define the beam size and to limit thermal loads on downstream optical components. The X-Y stages have positional and resolution requirements of 1 µm and 0.1 µm, respectively. This is achieved by micro-stepping the stepper motor by a Delta-Tau GeoBrick-LV-NSLS-II controller. During the initial operation of the X-Y stages unacceptable levels of vibration when the stages were in motion, and an intermittent sharp squealing when they were at rest, were discovered. In this paper we present the studies that were undertaken to investigate these issues and the solutions that were implemented. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE33 | |
| About • | paper received ※ 09 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017 | |
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TUPE34 |
Development of a Vertically Focusing Combined Function Dipole Magnet for Chess-U | |
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| There is an on-going major upgrade program for the Cornell High-Energy Synchrotron Source (CHESS) to boost the photon beam brilliance by an order of magnitude. In this project upgrade, dubbed CHESS-U, approximately an 80 meter section of the Cornell Electron Storage Ring (CESR) will be replaced by 12 compact double-bend achromats (DMA’s) to lower electron beam emittance by a factor of three. The critical element in the achromat is a 2.3 meter long combined function (CF) dipole magnet which has a curved geometry. In this cost-effective and transversely compact design, the magnet has a "C-shape" laminated core of dimensions 260 x 412 mm and with a tapered pole shape. This vertically focusing bending magnet will produce a nominal field of 0.651 T and a gradient of 9.365 T/m. A short, 37 cm CF dipole magnet prototype was constructed and is presently being tested. In this paper, design considerations, fabrication techniques, and assembly methods of the CF magnet are discussed. Characterization results of the 37 cm CF prototype magnet will also be presented. | ||
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TUPE35 |
Challenges in the Mechanical Design of the Injection Zone in the New ESRF Storage Ring | |
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| Most documents describing the lattice and performance of low emittance light sources concentrate on the standard cells where x-rays are produced. The requirements of the standard cells are different from those of the injection cell where electrons are introduced into the storage ring. The difficulties in adapting the existing injection facilities at the ESRF together with the integration of new injection elements in the storage ring are described. The new ESRF storage rings is extremely limited in space availability and, in particular, the positioning of the kicker magnets and the septa magnets have posed specific problems. An introduction to the various different electron trajectories together with a description of the specific elements and their functions in the injection process is made. The mechanical engineering design solutions that have been adopted are outlined. | ||
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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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