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SOLEIL

 
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MOPCH142 Commissioning of the SOLEIL RF Systems controls, cryogenics, CERN, vacuum 384
 
  • P. Marchand, H.D. Dias, M.D. Diop, M.E. El Ajjouri, J.L. Labelle, R.L. Lopes, M. Louvet, C.M. Monnot, J. Polian, F. Ribeiro, T. Ruan, R.S. Sreedharan, K. Tavakoli, C. Thomas-Madec
    SOLEIL, Gif-sur-Yvette
  • P. Bosland, P. Bredy
    CEA, Gif-sur-Yvette
  The 352 MHz RF accelerating systems for the SOLEIL Booster (BO) and Storage Ring (SR) are being commissioned. In the BO a 5-cell copper cavity of the CERN-LEP type is powered with a 35kW solid state amplifier. In the SR the required RF accelerating voltage (up to 4.4MV) will be provided by two cryomodules, each containing a pair of superconducting cavities, specifically designed for SOLEIL. The parasitic impedances of the high order modes are strongly attenuated by means of four coaxial couplers, located on the tube connecting the two cavities. The first cryomodule is already installed in the SR tunnel, while the second one is being constructed by ACCEL (Germany). These cryomodules are supplied in liquid helium from a single 350W liquefier and each cavity is powered with a 190kW solid state amplifier. The RF system commissioning and first operation results are reported.  
 
TUPCH008 Behavior of the BPM System During the First Weeks of SOLEIL Commissioning storage-ring, instrumentation, electron, synchrotron 1007
 
  • J.-C. Denard, L. Cassinari, N. Hubert, N.L. Leclercq, D. Pedeau
    SOLEIL, Gif-sur-Yvette
  SOLEIL, a new synchrotron light source built near Paris in France, is pioneering a new high resolution electron Beam Position Monitor (BPM) system to achieve stability of the beams at the micron level, as required for the beamlines. The same BPM system allows also measurement of the beam position in turn-by-turn mode for various machine physics studies. The system combines the high stability characteristic of multiplexed input channels and the flexibility of a digital system. Instrumentation Technologies developed the Libera module upon SOLEIL proposals and requirements. The performances of the system evaluated after the Booster and the storage ring commissioning will be presented.  
 
TUPCH111 RF System for the Superconducting Linac Downstream from DEINOS Injector controls, linac, ELSA, simulation 1271
 
  • P. Balleyguier, J.-L. Lemaire
    CEA, Bruyères-le-Châtel
  The DEINOS injector will be followed by an accelerator consisting of a LEP-like cryomodule including four 4-cell superconducting cavities. Each of these cavities will be fed by a solid-state amplifier delivering 20 kW in CW operation at 352 MHz. We will use the technology developed by the "Synchrotron SOLEIL" RF team, consisting of merging the power of numerous independent 330 W modules. The design of the low level RF system will be based on our experience with the ELSA accelerator.  
 
TUPCH112 Commissioning of the 100 MeV Preinjector HELIOS for the SOLEIL Synchrotron emittance, linac, gun, beam-loading 1274
 
  • A.S. Setty, D. Jousse, J.-L. Pastre, F. Rodriguez
    THALES, Colombes
  • R. Chaput, J.-P. Pollina, B. Pottin, M.-A. Tordeux
    SOLEIL, Gif-sur-Yvette
  • A. Sacharidis
    EuroMev, Buc
  HELIOS is the 100 MeV electron linac pre-injector of SOLEIL the new French SR facility. It has been supplied by THALES, as a turn-key system on the basis of SOLEIL APD design. The linac was commissioned in October 2005. This paper will remind the main features of the linac, especially on beam-loading compensation, and will give results obtained during the commissioning tests where a special care has been taken for emittance measurements. Specified and measured beam parameters will be compared to show the performance of the entire system.  
 
TUPCH186 Low Level RF System Development for SOLEIL feedback, simulation, beam-loading, damping 1447
 
  • P. Marchand, M.D. Diop, F. Ribeiro, R.S. Sreedharan
    SOLEIL, Gif-sur-Yvette
  • M. Luong, O. Piquet
    CEA, Gif-sur-Yvette
  The Low Level RF system that is used in the SOLEIL storage ring consists in fully analog "slow" amplitude, phase and frequency loops, complemented with a direct RF feedback. A fast digital FPGA-based I/Q feedback, currently under development, will be implemented later on. The performance of both systems has been evaluated using a Matlab-Simulink-based simulation tool. The computed and first experimental results are reported.  
 
WEPCH010 Beam-based Alignment for the Storage Ring Multipoles of Synchrotron SOLEIL quadrupole, alignment, sextupole, multipole 1939
 
  • A. Madur, P. Brunelle, A. Nadji, L.S. Nadolski
    SOLEIL, Gif-sur-Yvette
  First beam-based alignment (BBA) measurements will be carried out during the commissioning of the SOLEIL Storage Ring that will start in April 2006. The results will allow calibrating the zero reading of the 120 Beam Position Monitors (BPMs) with respect to the magnetic centre of the adjacent quadrupoles or sextupoles. BPMs being either adjacent to quadrupoles or sextupoles, we plan to resort to two different BBA methods related to each multipolar magnet. Moreover, as some BPMs are located near both quadrupole and sextupole, the use of both methods will allow us to cross-check the results. We will present here the first results and the comparison with the positions of the magnetic centres as obtained from the magnetic measurements.  
 
WEPLS118 The 3Hz Power Supplies of the SOLEIL Booster dipole, booster, synchrotron, power-supply 2652
 
  • P. Gros, S. Bobault, A. Loulergue
    SOLEIL, Gif-sur-Yvette
  SOLEIL is a 2.75 GeV new third generation synchrotron radiation facility under construction near Paris. The injector system is composed of a 100 MeV electron Linac pre-accelerator followed by a full energy (2.75 GeV) booster synchrotron. A repetition rate of 3Hz is required for the booster for the filling of the Storage Ring together with the need for discontinuous operation for top-up filling mode. Based on digital regulation loop, the four power supplies (2 for the dipoles 600 A x 1000 V and 2 for the quadrupoles 250 A x 450 V) reach the current tracking tolerance specification of 10-3. The aim of this paper is to describe the main issues from the loads to the mains network through the power converters that are essential to reach the required performances.  
 
THXPA02 Overview of the Status of the SOLEIL Project storage-ring, booster, vacuum, undulator 2723
 
  • J.-M. Filhol, J.C. Besson, P. Brunelle, M.-E. Couprie, J.-C. Denard, J.M. Godefroy, C. Herbeaux, V. Le Roux, P. Lebasque, A. Lestrade, M.-P. Level, A. Loulergue, P. Marchand, J.L. Marlats, A. Nadji, L.S. Nadolski, R. Nagaoka, B. Pottin, M.-A. Tordeux
    SOLEIL, Gif-sur-Yvette
  SOLEIL is a third generation synchrotron radiation source, under construction in France near Paris. The storage ring consists of a 357 m circumference ring, with 16 cells and 24 straight sections, out of which up to 21 will house insertion devices (ID). The optics features a low 3.7 nm.rad emittance at the 2.75 GeV operating energy, so as to provide high brilliance, from the VUV up to the hard x-ray domain. To reach a long lifetime, and beam position stabilities in the micron range, significant attention was paid at each design stage (optics, magnets, beam position monitors, vacuum and RF systems…), including on the design of the building, the construction of which is now complete. This resulted in some unprecedented approaches such as the intensive use of NEG coating vessels, or the development of a dedicated SC RF cavity and of 200 kW solid state RF amplifiers. The injector system (100 MeV Linac) and the 3 Hz full energy booster synchrotron have reached nominal operating conditions by fall 2005, while the ring commissioning should start by April 2006. Innovative ID's were designed and built so as to provide the best possible performances in a wide energy range (5 eV to 50 keV).  
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THPCH032 Instability Studies Using Evaluated Wake Fields and Comparison with Observations at SOLEIL impedance, single-bunch, simulation, betatron 2847
 
  • R. Nagaoka
    SOLEIL, Gif-sur-Yvette
  Beam instability is predicted for SOLEIL using the impedance data obtained through component-wise numerical evaluations. The paper also attempts to make the first comparison with measurements. A key issue for SOLEIL has been to acquire precise knowledge of impedance up to a few tens of GHz, due to short bunches, of chambers which are essentially 3D and additionally NEG coated to a large part, which is expected to enhance the reactive part of the resistive-wall impedance. The predictability of instabilities with the data attained thus becomes a large concern. Wake potentials computed with a 3D code are transformed to impedances and decomposed into a series of resonators, inductive and resistive components, to deduce the wake functions, while for NEG coated chambers, they are numerically Fourier transformed from analytically derived impedances. Both time and frequency domain simulations are performed to predict the longitudinal and transverse instabilities in single bunch, as well as resistive-wall instabilities in multibunch as a function of chromaticity. A multibunch tracking is also performed to investigate the filling pattern dependence of the latter.  
 
THPCH033 Recent Studies of Geometric and Resistive-wall Impedance at SOLEIL impedance, LEFT, vacuum, single-bunch 2850
 
  • R. Nagaoka, J.-C. Denard, M.-P. Level
    SOLEIL, Gif-sur-Yvette
  Coupling impedance studies are of great importance for SOLEIL not only to avoid beam instability, but also to ensure protection of a concerned chamber from EM fields excited by the beam. This paper deals with components that required particularly such efforts, which include BPMs, ceramic chambers, and a vertical scraper. The heat deposited in the BPM buttons is investigated as a function of the gap between a button and an electrode, button diameter and thickness. High temperatures on a vacuum tight feed-through would be a problem, affecting the measurement stability at high currents. Coupling of a trapped mode among successively passing bunches is also investigated. To evaluate the heat deposited in a titanium coated ceramic chamber, its impedance is analytically solved using the field matching technique. The solution obtained justifies the image current model that assumes a constant image current density across the coating when the skin depth is greater than the coating thickness. The azimuthal image current distribution is pursued with Piwinski's formalism for flat chambers. The paper also deals with components not treated earlier such as a stripline.  
 
THPCH108 Status of SOLEIL Control Systems controls, ESRF, storage-ring, booster 3053
 
  • A. Buteau, P. Betinelli, L.S. Nadolski
    SOLEIL, Gif-sur-Yvette
  The SOLEIL light source is a 2.75 GeV third generation synchrotron radiation facility under construction near Paris Storage ring commissioning is scheduled for April 2006 and 10 BL operation for the end of 2006. This paper will describe the technical solution choosen for the control systems of accelerators and beamlines, and will give the status of the deployment. On the hardware side, the SOLEIL Controls team has implemented an industrial approach using PLCs, standard Motion Controlers and CPCI Systems. The details of our technical choices and architectures will be described in this paper. On the software side, the SOLEIL Controls team has worked closely with ESRF's one on the TANGO framework since 2002. A quick tour on the TANGO software components used for SOLEIL Controls will be detailed. On the supervision layer, SOLEIL has choosen Java as the core technology, using javabeans components provided by the TANGO toolkit within an industrial SCADA (GlobalScreen). These tools and components for Graphical User Interface development will be presented. At last, an overview of the deployment of these systems on our installation will conclude this document.  
 
THPCH109 Control Applications for SOLEIL Commissioning and Operation controls, storage-ring, synchrotron, booster 3056
 
  • L.S. Nadolski, A. Buteau, J. Chinkumo, R.C. Cuoq, X. Deletoille, M.O. Ounsy, S. Petit, K.S. Saintin
    SOLEIL, Gif-sur-Yvette
  Synchrotron SOLEIL, the French third generation light source being commissioned in 2006, is the first facility using TANGO as a full control system. Control applications for operation and Beam Physics Dynamics have being developed using two major tools: the Matlab Middle Layer adapted from ALS and Spear3, and GlobalSCREEN, commercial SCADA software. Both tools are fully interfaced with the TANGO control system. In this paper, a sketch of the software architecture is shown. Then Storage Ring applications developed in house are presented. Finally configuration and database related applications (archiving, snapshot) are briefly described.  
 
THPLS006 The Machine Installation at SOLEIL alignment, vacuum, quadrupole, dipole 3275
 
  • J.C. Besson, X. Deletoille, J.-F. Lamarre, D. Lefebvre, H. Rozelot
    SOLEIL, Gif-sur-Yvette
  SOLEIL is a third generation Synchrotron radiation Source, under construction in France near Paris. The 357 m circumference storage ring is mainly composed of (32 +1) dipoles, 160 quadrupoles, 120 sextupoles, 2 RF cryomodules, ~ 200 vacuum chambers, 6 injection equipment; 12 beamline front-ends and 4 insertion devices (initially). The 157 m circumference Booster comprises 36 dipoles, 44 quadrupoles, 28 sextupoles, 1 RF cavity and 8 injection/extraction equipment. Before the beginning of the Process installation, a general planning was established detailing the various stages of the equipment installation and their assembly protocols before their on-site installation. In reality, many unknown factors, delays on the buildings, delays on the equipment deliveries, technical problems encountered during the construction, have constrained us to significantly and frequently amend and adapt this initial planning. Due to the various delays, it was also necessary to manage the cohabitation with the various building trades. However, the work made on the initial planning paid off as without its detailed protocols, we could not have carried out the Process installation within correct deadline.  
 
THPLS007 Magnetic Measurements Results of the Dipoles, Quadrupoles and Sextupoles of the SOLEIL Storage Ring quadrupole, dipole, sextupole, storage-ring 3278
 
  • P. Brunelle, C. Benabderrahmane, P. Berteaud, F. Briquez, A. Dael, L. Dubois, M. Girault, A. Madur, F. Marteau, A. Nadji, F. Paulin, J. Vétéran
    SOLEIL, Gif-sur-Yvette
  During the magnetic measurement campaign, from May 2004 to August 2005, the 326 electro-magnets of the SOLEIL Storage Ring have been characterized in terms of magnetic axis centering and field properties. For the dipoles, two types of measurements have been performed at SOLEIL: field mapping in the mid plan using a Hall probes bench, and field integral comparison with a reference magnet using a stretched wire bench. For the quadrupoles, a rotating coil bench has been built and optimized at SOLEIL in order to reach magnetic center and tilt angle adjustments within ± 25 μm and ± 0.1 mrad respectively. For the sextupoles, magnetic measurements have been performed by the SIGMAPHI Company. This paper will present the main features of the SOLEIL benches, the results of magnetic measurements in terms of reproducibility, field identity between magnets, magnetic axis centering, and harmonic content versus current. Moreover, the origin of some unexpected harmonic field components will be discussed, as well as the magnetic compensation scheme used to minimize some of them.  
 
THPLS008 Commissioning of the SOLEIL Booster booster, injection, extraction, emittance 3281
 
  • A. Loulergue
    SOLEIL, Gif-sur-Yvette
  SOLEIL is a 2.75 GeV new third generation synchrotron radiation facility under construction near Paris. The injector system is composed of a 100 MeV electron Linac pre-accelerator followed by a full energy (2.75 GeV) booster synchrotron. The booster lattice is based on a FODO structure with missing magnet. With a circumference of 157 m and low field magnets (0.74 T), the emittance is in the range of 110 to 150 nm.rad at 2.75 GeV. The magnets are excited at 3 Hz, using switched mode power supplies, with digital regulation. The LEP type RF cavity is powered by a 35 kW-352 MHz solid state amplifier. Closed orbits are measured turn by turn, using the BPM Libera digital electronics. The commissioning took place in October 2005, and an acceleration efficiency of 75% was obtained at the maximum energy. The main results achieved during that commissioning will be reported.  
 
THPLS009 First Results of the Commissioning of SOLEIL Storage Rings storage-ring, injection, quadrupole, closed-orbit 3284
 
  • A. Nadji, J.C. Besson, P. Betinelli, P. Brunelle, A. Buteau, L. Cassinari, M.-E. Couprie, J.-C. Denard, J.-M. Filhol, P. Gros, C. Herbeaux, J.-F. Lamarre, P. Lebasque, M.-P. Level, A. Loulergue, A. Madur, P. Marchand, L.S. Nadolski, R. Nagaoka, B. Pottin, M.-A. Tordeux
    SOLEIL, Gif-sur-Yvette
  The commissioning of SOLEIL's storage ring will start in April 2006. The objective is to reach, within a first phase of two months, stable beam conditions at 100 mA in the multi-bunch mode that can be used for the commissioning of the beamlines. This is a challenging objective, especially because the SOLEIL's ring is incorporating some innovative techniques such as the use of a superconducting RF cavity, NEG coating for all straight parts of the machine and new BPM electronics. Prior to the start of the commissioning, some insertion devices and most of the insertion devices low gap vacuum vessels, including 10 mm inner vertical aperture vessels for the Apple-II type, will be installed on the ring. This paper will review the performances of all these equipment in presence of the beam. The results of the first commissioning runs will be presented.  
 
THPLS010 Metrology for the Beam Emittance Measurement of the SOLEIL Injector emittance, booster, linac, quadrupole 3287
 
  • M.-A. Tordeux, Y.-M. Abiven, N.L. Leclercq, D. Pedeau
    SOLEIL, Gif-sur-Yvette
  The injector system of SOLEIL is composed of a 100 MeV electron linac pre-accelerator followed by a full energy 2.75 GeV booster synchrotron, operating at 3 Hz. Dedicated diagnostics such as emittance monitors are installed on the two transfer lines between the linac and the booster and between the booster and the storage ring. The measurement is performed using the gradient method, relying on YAG screens and high resolution CCD cameras. This paper will show the metrology of the emittance measurements which were made for the HELIOS (THALES) iinac beam (total emittance in the range of 1 μm.rad) and for the booster beam (rms emittance ~ 150 nm.rad): error sources are identified and specific corrections are shown. Additional analysis of the dynamics of the injection into the booster and into the storage ring is made for a deeper characterization.  
 
THPLS100 Four Matched Kicker Systems for the SOLEIL Storage Ring Injection, a Full Solid State Solution of Pulsed Power Supplies Working at High Current kicker, storage-ring, vacuum, injection 3508
 
  • P. Lebasque, R. Ben El Fekih, C. Herbeaux, J.-P. Lavieville, J.L. Marlats
    SOLEIL, Gif-sur-Yvette
  The Top Up injection mode of the SOLEIL Storage Ring needs a very good matching of the four kicker magnet fields. But their implantation inside the straight section dedicated to SR injection imposed high level forces on each of the four kickers. This contribution describes the ceramic vacuum chambers and magnets design optimised to provide a very good identity of the four magnets. The pulsed power supplies, based on IGBT high voltage modules, designed to work at high current (5250 A-9000 V) could be located outside the SR tunnel. We highlight the specific development on all components specification and electrical scheme that permits to reach such a challenge. The electrical and magnetic measurement results are reported.  
 
THPLS102 Optimisation of the Coating Thickness on the Ceramic Chambers of the SOLEIL Storage Ring kicker, injection, vacuum, storage-ring 3514
 
  • P. Lebasque, L. Cassinari, J.P. Daguerre, C. Herbeaux, M.-P. Level, C. Mariette, R. Nagaoka
    SOLEIL, Gif-sur-Yvette
  The SOLEIL storage ring injection section integrates four matched injection kicker magnets, two diagnostics kicker magnets and a beam shaker, which need ceramic vacuum chambers with an inner titanium coating. For each utilisation (according with its field amplitude and its time or frequency domain), the coating thickness has been evaluated from the different points of view: field attenuation, beam deposited power, magnet excitation deposited power, and cooling efficiency. So we could determine the different coating thicknesses and tolerances needed according to the different magnetic field shapes. The realised ceramic chambers have adequate coating resistances, with in particular a low non-uniformity among the matched injection kicker magnets chambers.  
 
THPLS118 Status of the SOLEIL Insertion Devices undulator, insertion, insertion-device, polarization 3556
 
  • F. Briquez, C. Benabderrahmane, P. Berteaud, O.V. Chubar, M.-E. Couprie, L. Dubois, J.-M. Filhol, M. Girault, O. Marcouillé, F. Marteau, M. Massal, F. Paulin, M.V. Valleau, J. Vétéran
    SOLEIL, Gif-sur-Yvette
  • A. Dael
    CEA, Gif-sur-Yvette
  SOLEIL is the French 2.75 GeV synchrotron radiation light source of low emittance under construction near Paris. It will provide high intensity photons covering a wide spectral range from the IR to the hard x-rays. The storage ring commissioning will start in April 2006, and the first photons in the beam lines are expected during summer 2006. The first set of Insertion Devices (ID) will be installed before the commissioning or within the first year of operation of the machine. They consist of one 640 mm period and three 256 mm period electromagnetic helical undulators, three 80 mm period Apple II type undulators, and three 20 mm period in-vacuum undulators. All these ID's make use of a wide panoply of technical solutions for generating various types of magnetic fields. Magnetic and conceptual designs were performed by SOLEIL, and the technical realisation was carried out together with the different manufacturers. The design specificities of the different types of ID's and the magnetic field characterisation and optimisation will be reported. The first commissioning on the beam of these undulators will be described.