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booster

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MOZCG01 Top-Up Operation in Light Sources injection, storage-ring, emittance, single-bunch 36
 
  • H. Ohkuma
    JASRI/SPring-8, Hyogo-ken
  The top-up operation for user experiments has been performed at several light sources, and at most of the new light sources the top-up operation is considered in their design phase. In this paper, an overview of the top-up status in light sources is presented, including the performance of injectors for top-up in light sources, technological aspects, examples and operational data from existing machines and proposed upgrades, etc.  
slides icon Slides  
 
MOPC015 Start-to-End Simulations of the PSI 250 MeV Injector Test Facility gun, emittance, linac, simulation 100
 
  • Y. Kim, A. Adelmann, R. J. Bakker, M. Dehler, R. Ganter, T. Garvey, A. Oppelt, M. Pedrozzi, J.-Y. Raguin, L. Rivkin, A. Streun, F. Stulle, A. F. Wrulich
    PSI, Villigen
  From 2003, PSI has been investigating the advanced Low Emittance Gun (LEG) based 6 GeV PSI XFEL facility to supply coherent, ultra-bright, and ultra-fast XFEL photon beams covering from 0.1 nm to 10 nm. To build whole facility within a 800 m space, required beam parameters in front of undulators are challenging. For the first two FEL beamlines (FEL 1 and FEL 2), the required normalized slice emittance, slice energy spread, and peak current are about 0.2 mm.mrd, 0.6 MeV, and 1.5 kA, respectively. However, the required beam parameters for the third FEL beamline (FEL 3) covering 1 nm to 10 nm are somewhat flexible. Therefore PSI has been developing two different gun technologies. The 1 MV high gradient pulsed diode and field emission based advanced LEG will be used for first two FEL beamlines, while the CTF3 gun type V based conventional RF photoinjector will be used for the third FEL beamline. To test those two injector technologies, a dedicated 250 MeV injector test facility will be constructed at PSI from 2008. In this paper, we describe beam dynamics in two accelerator optimizations of the CTF3 RF gun based 250 MeV injector test facility for the PSI XFEL project.  
 
MOPC058 ALICE (ERLP) Injector Design emittance, gun, laser, cathode 196
 
  • B. D. Muratori, Y. M. Saveliev
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
  In this paper we look at how the ALICE (formerly ERLP) injector has been re-designed to meet more realistic criteria from the previous design. A key component of ALICE is the high brightness injector. The ALICE injector consists of a DC photocathode gun generating 80 pC electron bunches at 350 keV. These bunches are then matched into a booster cavity which accelerates them to an energy of 8.35 MeV. In order to do this, two solenoids and a single-cell buncher cavity are used, together with off-crest injection into the first booster cavity, where the beam is still far from being relativistic. The performance of the injector has been studied using the particle tracking code ASTRA.  
 
MOPD014 First Test Results of ILC/STF Cryogenic System at KEK cryogenics, superconducting-RF, vacuum, linear-collider 472
 
  • S. Kaneda, T. Ichitani
    Taiyo Nippon Sanso Corporation, Kawasaki-city Kanagawa Pref.
  • K. Hara, K. Hosoyama, A. Kabe, Y. Kojima, H. Nakai, K. Nakanishi
    KEK, Ibaraki
  • T. Kanekiyo
    Hitachi Technologies and Services Co., Ltd., Kandatsu, Tsuchiura
  • M. Noguchi
    Mayekawa MFG. Co., Ltd., Moriya
  • S. Sakuma, K. Suzuki
    Taiyo Nippon Sanso Higashikanto Corporation, Hitachi-city, Ibaraki-Pref
  • J. Yoshida
    Hitachi Plant Technologies, Ltd., Tokyo
  The STF (Superconducting RF Test Facility) cryogenic system, of which capacity is 30W at 2.0K, has been constructed and commissioned for testing STF cryomodule. In the first operation phase, the STF cryogenic system was successfully cooled down to maintain a superconducting RF cavity at the working temperature of 2.0K. Presented in this session will be the results of the first operation of the cryogenic system and the future collaboration plan among KEK and Japanese cryogenic industrial members.  
 
MOPD016 ALS Storage Ring RF System Upgrade klystron, storage-ring, controls, power-supply 478
 
  • K. M. Baptiste, J. Julian, S. Kwiatkowski
    LBNL, Berkeley, California
  ALS is one of the first third generation synchrotron light sources which has been operating since 1992 at Berkeley Lab. Presently, the ALS Storage Ring System is comprised of a single 330kW klystron feeding two normal-conducting single-cell RF cavities via a WR1800 circulator and magic-tee transmission system. The klystron has operated well beyond its expected lifetime and even though replacement klystrons are available from a different manufacturer, we have opted to build the replacement amplifier with a system of four Inductive Output Tubes, (IOT). The new amplifier system will use Cavity Combiners (CaCo) to combine IOT outputs and a magic-tee to combine IOT pairs to feed the existing transmission line connected to the cavities. The existing HVPS will be upgraded to interface with the four IOT amplifiers and its crowbar will be replaced with a series solid-state switch. The system is being designed to operate with the industry standard external cavity IOTs (80kW) and integral cavity IOTs (90-100kW). In this paper we will present the details of the upgrade of each of the sub-systems in the ALS Storage Ring RF System.  
 
MOPD029 Commissioning of the 2,2 kW, 476 MHz Solid State RF Power Source for the LNLS Booster Synchrotron synchrotron, injection, storage-ring, electron 511
 
  • C. Pardine, R. H.A. Farias, P. F. Tavares
    LNLS, Campinas
  A 2.2 kW, 476 MHz unconditionally stable solid state RF amplifier for CW operation has been built, tested, and is being used since july 2007 at LNLS. The amplifier, designed and developed in collaboration with Synchrotron SOLEIL, is made of 9 modules, each one containing one push-pull 290 W MOSFET equipped with an internal circulator and RF load. Low cost, reliability, linearity and high efficiency are the main features we aimed for in this device, which was developed for the LNLS Booster Injector. In this paper, we present technical characteristics as well as test results of the system.  
 
MOPD038 First Radiation Monitoring Results During Elettra Booster Commissioning radiation, injection, shielding, monitoring 535
 
  • K. Casarin, E. Quai, S. Sbarra, G. Tromba, A. Vascotto
    ELETTRA, Basovizza, Trieste
  The new injection system for the Elettra storage ring is based on a 100 MeV linac and a booster synchrotron, where the electron energy can be raised up to 2.5 GeV. The new machine is designed to perform full energy injection, also in top-up mode. Outside the shielding, radiation monitoring is performed through a real-time network of gamma and neutron dosimeters as well as through TLD passive dosimeters. The radiation monitors placed next to the beamlines are interlocked with the machine operation and prevent injection into the storage ring if the alarm threshold is exceeded. This paper reports the first results of the radiation monitoring performed during the new injector commissioning.  
 
MOPD039 The Personnel Safety System of the Elettra Booster storage-ring, controls, radiation, injection 538
 
  • K. Casarin, L. Battistello, S. Fontanini, F. Giacuzzo, M. Lonza, E. Quai, S. Sbarra, G. Tromba, A. Vascotto, L. Zambon
    ELETTRA, Basovizza, Trieste
  The new injector of the Elettra storage ring is based on a 100 MeV linac feeding a 3 Hz booster synchrotron. The booster is designed to accelerate the electron beam up to the maximum energy of 2.5 GeV, providing full-energy injection into the storage ring. The Personnel Safety System (PSS) of the new injector protects personnel from radiation hazards by controlling access to restricted areas and interrupting the machine operation in case unsafe conditions occur. The system is based on Programmable Logic Controller (PLC) technology providing redundant logic in a fail-safe configuration. This paper describes the radiation safety criteria that have been defined to minimize radiation exposure hazards as well as the technology and architecture chosen for the PSS implementation.  
 
MOPD041 The SSRF Radiation Safety Interlock System radiation, controls, storage-ring, linac 541
 
  • X. J. Xu, J. H. Cai, J. Cai, K. M. Fang, Z. D. Hua, X. Liu, J. H. Wang, J. Q. Xu
    SINAP, Shanghai
  Radiation Safety Interlock System (RSIS) for the Shanghai Synchrotron Radiation Facility (SSRF) is composed of two subsystems, the Access Control System (ACS) and the radiation containment system (RCS).The ACS prevents personnel from being exposed to the extremely high radiation inside the SSRF shielding tunnel (or called the interlock area) during machine operation. The RCS prevents personnel from being exposed to the high radiation outside a shielding tunnel during either normal or abnormal operation. The implementation of the ACS is based on the Programmable Logic Controllers, key transfer interlocking systems and IC card system. The RSIS is based on fail-safe, redundancy, multiplicity. Any violation of the RSIS will result in the inhibiting of redundant permission to the associated interlock systems, and cease the injection process and eliminate the entire stored electron beam in the SSRF. This paper describes the design philosophy, the logic, and the implementation of the RSIS at SSRF.  
 
MOPP084 Installation and Commissioning of the RF System for the New Elettra Booster storage-ring, injection, controls, radiation 745
 
  • A. Fabris, M. Bocciai, L. Bortolossi, M. Ottobretti, C. Pasotti, M. Rinaldi
    ELETTRA, Basovizza, Trieste
  The commissioning of the new booster of the Elettra synchrotron radiation source started in Fall 2007. The RF system of the booster is made of a five cells accelerating cavity fed by a 60 kW 500 MHz power plant. The accelerating cavity voltage is ramped along with the booster energy at a 3 Hz repetition rate. The cavity field is controlled by analog feedback loops on amplitude, phase and the resonant frequency. This paper describes the setting into operation of the system and its performances during the commissioning phase of the machine.  
 
MOPP087 RF System for the SSRF Booster Synchrotron synchrotron, injection, extraction, electron 754
 
  • Q. Gu, L. X. Chen, M. Chen, L. Feng, Z. Q. Feng, H. T. Hou, J. F. Liu, C. Luo, D. Q. Mao, F. Wang, Zh. G. Zhang, S. J. Zhao, Y. B. Zhao, Z. S. Zhou
    SINAP, Shanghai
  The booster synchrotron of the Shanghai Synchrotron Radiation Facility (SSRF) ramps the energy of electron beam from 150 MeV to 3.5 GeV with a repetition rate of 2 Hz. The guidelines of the system design are simplicity and reliability, and the ability of top-up injection for the storage ring is also taking into account. The RF system consists of a 180kW CW plant with a WR1800 waveguide line, two PETRA type 5-cell cavities and an analog low level RF electronics with vector-sum scheme. An overview, installation and commissioning of the whole booster RF system are presented in this paper. The performance of the RF system with the beam is also given.  
 
MOPP105 Compact, Tunable RF Cavities proton, synchrotron, vacuum, controls 802
 
  • M. Popovic, C. M. Ankenbrandt, E. Griffin, A. Moretti, R. E. Tomlin
    Fermilab, Batavia, Illinois
  • M. Alsharo'a, I. B. Enchevich, R. P. Johnson, S. Korenev
    Muons, Inc, Batavia
  New developments in the design of fixed-field alternating gradient (FFAG) synchrotrons have sparked interest in their use as rapid-cycling, high intensity accelerators of ions, protons, muons, and electrons. Potential applications include proton drivers for neutron or muon production, rapid muon accelerators, electron accelerators for synchrotron light sources, and medical accelerators of protons and light ions for cancer therapy. Compact RF cavities that tune rapidly over various frequency ranges are needed to provide the acceleration in FFAG lattices. An innovative design of a compact RF cavity that uses orthogonally biased ferrite for fast frequency tuning and liquid dielectric to adjust the frequency range is being developed using physical prototypes and computer models.  
 
MOPP138 First Test Results from the Cornell ERL Injector Cryomodule emittance, alignment, linac, acceleration 883
 
  • M. Liepe, S. A. Belomestnykh, E. P. Chojnacki, Z. A. Conway, R. Ehrlich, R. P.K. Kaplan, V. Medjidzade, H. Padamsee, P. Quigley, J. J. Reilly, D. M. Sabol, J. Sears, V. D. Shemelin, E. N. Smith, V. Veshcherevich, D. Widger
    CLASSE, Ithaca
  Cornell University has developed and fabricated a 5 cavity SRF injector cryomodule for the acceleration of a high current (100 mA), ultra low emittance beam. This cryomodule has been installed in the Cornell ERL prototype, and is presently under extensive test. The combination of a high beam current with emittance preservation of an ultra low emittance beam results in a multitude of challenges for the SRF system, pushing parameters well beyond present state of the art. Strong HOM damping and effective HOM power extraction is required to support the 100 mA beam current. This is achieved by placing HOM beam line absorbers between all cavities. Emittance preservation is addressed by a symmetric beam line with twin input couplers, tight cavity alignment and the option of fine alignment of cold cavities. In this paper we report on first results from the injector module test, including cavity performance tests, static heat load measurements and microphonic studies.  
 
MOPP141 Commissioning of the ERLP SRF Systems at Daresbury Laboratory linac, radiation, gun, shielding 889
 
  • P. A. McIntosh, R. Bate, R. K. Buckley, S. R. Buckley, P. A. Corlett, A. J. Moss, J. F. Orrett, S. M. Pattalwar, A. E. Wheelhouse
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
  • F. G. Gabriel
    FZD, Dresden
  • A. R. Goulden
    STFC/DL/SRD, Daresbury, Warrington, Cheshire
  • P. vom Stein
    ACCEL, Bergisch Gladbach
  The Energy Recovery Linac Prototype (ERLP) has been installed at Daresbury Laboratory and its baseline commissioning completed. The SRF systems for ERLP comprise two 9-cell, 1.3 GHz accelerating cavities in the injector (or Booster) cryomodule, which provide a nominal energy gain of 8 MeV for the injected 350 keV beam from the photo-injector. The beam is then accelerated in an identical two cavity cryomodule in the energy recovery main Linac, giving a final ERLP energy of 35 MeV. Each SRF accelerating cavity is powered by commercially available Inductive Output Tubes (IOTs) and the analog LLRF control system is identical to that employed on the ELBE facility at FZD Rossendorf. This paper details the commissioning experience gained for these systems and highlights the ultimate performance achieved.  
 
TUOAM01 Commissioning Status of the Shanghai Synchrotron Radiation Facility storage-ring, injection, linac, feedback 998
 
  • Z. T. Zhao, H. Ding, H. Xu
    SINAP, Shanghai
  The Shanghai Synchrotron Radiation Facility (SSRF), an intermediate energy storage ring based third generation light source, is under commissioning at a site in Shanghai Zhang-Jiang Hi-Tech Park. The ground breaking of this project was made on Dec.25, 2004, and on Dec.24, 2007 electron beam was stored and accumulated in the SSRF storage ring. Since then the accelerator commissioning and beamline installation have been being continued toward the scheduled user operation from May 2009. This paper presents an overview of the SSRF status and its machine commissioning progress.  
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TUOBM04 FFAGs for the ERIT and ADS Projects at KURRI proton, target, injection, storage-ring 1013
 
  • T. Uesugi, H. Horii, Y. Kuriyama, K. Mishima, Y. Mori, A. Osanai, T. Planche, S. Shiroya, M. Tanigaki, H. Yoshino
    KURRI, Osaka
  • M. Inoue
    SLLS, Shiga
  • Y. Ishi
    Mitsubishi Electric Corp, Energy & Public Infrastructure Systems Center, Kobe
  • M. Muto
    FFAG DDS Research Organization, Tokyo
  • K. Okabe, I. Sakai
    University of Fukui, Faculty of Engineering, Fului
  A chain of FFAG proton accelerator have been under construction at Kyoto University Research Reactor Institute (KURRI), Osaka, for the study of accelerator driven system (ADS) since 2004. The accelerator is a cascade type and composed of three different FFAG rings: injector, booster and main ring. The maximum energy of the main ring is 150 MeV for proton. The beam was successfully accelerated and extracted from the booster in June of 2006 and the beam commissioning of the main ring has started since then. Recently the beam has been successfully injected into the main ring.  
slides icon Slides  
 
TUPC004 The Diagnostic Line of Elettra Booster 100MeV Pre-injector diagnostics, controls, bunching, pick-up 1044
 
  • S. Bassanese, L. Badano, M. Bossi, A. Carniel, G. Ciani, S. Di Mitri, M. Ferianis, G. Mian, G. Penco, M. Veronese
    ELETTRA, Basovizza, Trieste
  In order to fully characterize the beam of the new 100MeV linac pre-injector for the Elettra Booster, a standard diagnostic set-up has been designed which includes strip line BPMs, scintillating screens and current transformers. During the initial tuning of the pre-injector, a thermo-ionic gun followed by a 500MHz pre bunching cavity, an S-band bunching structure and two LIL accelerating sections, some extra diagnostics have been used to get a deeper understanding of the pre-injector operating point. In particular some prototypes of the FERMI@elettra diagnostics, installed on the same booster pre-injector, have been used to better characterize the beam transverse and longitudinal beam axis. An improved resolution screen system, equipped with a YAG screen, has been used as well as a wideband longitudinal pick-up. The measurement results as well as the tuning procedure are here presented.  
 
TUPC014 SSRF Injector Diagnostics Commissioning Results linac, diagnostics, emittance, radiation 1074
 
  • Y. Z. Chen, J. Chen, Z. C. Chen, Y. B. Leng, Y. B. Yan, W. M. Zhou
    SINAP, Shanghai
  This paper presents Injector beam diagnostics layout of the Shanghai Synchrotron Radiation Facility(SSRF) which includes the 150MeV LINAC, booster(3.5GeV) and beam transport lines. The different beam diagnostics monitors for beam current, beam position and beam profile are briefly described. The beam diagnostics data acquisition architecture is introduced. Commissioning Results of the 150Mev LINAC are presented, as well as the commissioning status of the booster .  
 
TUPC015 Data Acquisition and Analysis in SSRF BPM System storage-ring, electron, controls, closed-orbit 1077
 
  • Y. B. Yan, Y. Z. Chen, Y. B. Leng, W. M. Zhou, Y. Zou
    SINAP, Shanghai
  The beam position monitor (BPM) system in Shanghai Synchrotron Radiation Facility (SSRF) is fully (Linac, transfer line, booster and storage ring) equipped with Libera Electron BPM Processors. Primary data acquisition and position calculation has been done in Libera FPGA. EPICS support package developed by Diamond Light Source has been adapted to link BPM system with accelerator control system. Two dedicated soft IOCs are introduced to collect beam position data from all Libera IOCs and calculate RMS noise, histogram, spectrum and phase space, etc. online. Other BPM based analysis is completed via MATLAB scripts. The initial results during booster and storage ring commissioning will be described in this paper.  
 
TUPC017 Beam Instrumentation System Development and Commissioning in SSRF linac, storage-ring, feedback, diagnostics 1080
 
  • Y. B. Leng, J. Chen, Y. Z. Chen, Z. C. Chen, G. Q. Huang, D. K. Liu, Y. B. Yan, K. R. Ye, C. X. Yin, J. Yu, L. Y. Yu, R. Yuan, G. B. Zhao, L. Y. Zhao, W. M. Zhou, Y. Zou
    SINAP, Shanghai
  In recent months the first beams have been stored in the Storage Ring of the Shanghai Synchrotron Radiation Facility (SSRF). The brief introduction will be given of the beam diagnostics system development. The initial commissioning results including beam profile monitors, beam position monitors (BPMs), DC current monitors (DCCT), and synchrotron radiation monitor (SRM) will be reported in this paper.  
 
TUPC079 Beam Emittance Measurement for the New Full Energy Injector at ELETTRA emittance, quadrupole, simulation, diagnostics 1236
 
  • G. Penco, L. Badano, S. Bassanese, G. Ciani, P. Craievich, S. Di Mitri, M. Ferianis, M. Predonzani, M. Veronese
    ELETTRA, Basovizza, Trieste
  • A. A. Lutman
    DEEI, Trieste
  An emittance measurement station was set up and operated with the quadrupole scan technique to characterize the electron beam transverse phase space at the Elettra laboratory. The diagnostic station, based on a YAG:Ce scintillation screen imaged by a CCD digital camera, was installed at the end of the 100 MeV booster pre-injector together with a beam longitudinal structure monitor. This equipment plays an important role for the bunching system optimization and for the optical matching of the injection transfer line to the booster ring. Experimental results and comparison with multi-particle tracking codes simulation are presented in this paper.  
 
TUPC089 Robust Emittance Evaluation from Complex Transverse Phase Spaces emittance, background, electron, damping 1263
 
  • A. R. Rossi, A. Bacci
    INFN-Milano, Milano
  We present a novel procedure to analyze the transverse phase space of low energy electron bunches, close to a beam waist, in order to retrieve a sound estimate of its emittance. The procedure consist in a genetic code and a non linear fit applied in cascade, the first feeding the parameters starting values of the former. This allows us to cleanse the phase space from noise, separate the core charge from the halos and distinguish between bunch components undergoing different dynamics, such as cross over or the double emittance minima effect. Our procedure performs a rough longitudinal beam tomography, based on dynamical considerations, using transverse data. The application of the procedure to some experimental data is shown.  
 
TUPC127 Utility Design for the 3GeV TPS Electron Storage Ring storage-ring, synchrotron, controls, synchrotron-radiation 1365
 
  • J.-C. Chang, Y.-C. Lin, Y.-H. Liu, Z.-D. Tsai
    NSRRC, Hsinchu
  • J.-R. Chen
    NTHU, Hsinchu
  Having been running the Taiwan Light Source (TLS) for fourteen years since its opening in 1993, National Synchrotron Radiation Research Center (NSRRC), Taiwan, has been approved to build a photon source (TPS) last year. TPS is preliminarily designed with 3.0 GeV in energy, 518.4m in circumference and 24 Double-Bend Achromat (DBA). The utility system, including the electrical power, cooling water and air conditioning system of the TPS were designed to meet requirements of high reliability and stability. Because the power consumption of the TPS is estimated about three times that of TLS, energy saving is another consideration. This paper therefore discusses utility design concepts and presents partial design results, including capacity requirements, equipment and piping layouts.  
 
TUPC147 Analogue LLRF for the ALBA Booster controls, synchrotron, injection, resonance 1416
 
  • H. Hassanzadegan, F. Pérez
    ALBA, Bellaterra
  ALBA Booster will inject up to 2 mA of current, at 3 Hz, in the 3 GeV 3rd generation Synchrotron Light Source ALBA, that is in the construction phase in Cerdanyola, Spain. The Booster will ramp the beam energy from 100 MeV to 3 GeV, the RF voltage will be ramped as well from <100 kV to 1 MV to improve injection efficiency and maintain the beam stable. The Booster RF System will have to provide up to 1 MV of accelerating voltage and have a high dynamic range. An Analogue LLRF prototype has been developed for the Booster 5 cell RF Cavity. The prototype is based on the IQ modulation/demodulation technique and it has been designed completely in house. The prototype has been installed in the high power RF lab of CELLS and tested to control up to 80 kW on the real Booster Cavity. The test results of the control loops (amplitude, phase and tuning) will be presented, as well as the hardware structure and the system interface.  
 
TUPD006 The Injection and Extraction Kicker Circuits for the Elettra Booster kicker, extraction, injection, storage-ring 1443
 
  • R. Fabris, P. Tosolini
    ELETTRA, Basovizza, Trieste
  The design, realization and performance of the power circuits for the Booster injection and extraction Kicker magnets are presented. Both circuits have been designed and developed with the goal to achieve reliable working conditions, simple maintenance and fast recovery time in case of failures. The circuits are designed around the same switching unit already adopted in the Kicker system of the Storage Ring injection; this allows storing common spare parts for both circuits and for the Storage Ring Kicker system as well. Beside the analytical analysis, a parametric study of the circuit, with the Microsim PSPICE software package, allowed to optimize the performance of the circuit regarding the parameters which were considered critical for the Booster injection and extraction processes, i. e. the current pulse rise time and fall time.  
 
TUPP005 Application Programs for the Elettra Booster Commissioning and Operation optics, controls, lattice, power-supply 1535
 
  • F. Iazzourene, V. Forchi', C. Scafuri
    ELETTRA, Basovizza, Trieste
  The application programs developed for the commissioning and operation of the new Elettra injector* are all based on the TANGO control system, a new high level framework and a beam optics module named Vicky**. The present paper summarizes the main developed application programs and their successful use during commissioning and operation of the new injector.

*"Overview of the Status of the Elettra Booster Project," these proceedings.
**"Elettra New Full Injector High Level Software," C. Scafuri, F. Iazzourene, EPAC 2006.

 
 
TUPP009 Implementation and Operation of the Elettra Booster Control System controls, injection, linac, power-supply 1544
 
  • M. Lonza, F. Asnicar, L. Battistello, S. Fontanini, V. Forchi', G. Gaio, F. Giacuzzo, E. Mariotti, R. Marizza, R. Passuello, L. Pivetta, C. Scafuri, G. Scalamera, G. Strangolino, D. Vittor, L. Zambon
    ELETTRA, Basovizza, Trieste
  A new injector based on a 100 MeV linac and a 2.5 GeV booster synchrotron has been built and commissioned at Elettra to provide full energy and top up injection into the storage ring. The booster replaces the 1.2 GeV linac that will be used for the new 4th generation light source FERMI@Elettra currently under construction at Elettra. A new architecture has been adopted for the booster control system based on the Tango control system software. The implementation of the control system and the tools developed to meet an aggressive commissioning time schedule are presented. The experience gained during the operation of the booster is also discussed.  
 
TUPP014 Control System for a 150 MeV FFAG Complex in KURRI controls, power-supply, radiation, proton 1556
 
  • M. Tanigaki, N. Abe, K. Mishima, Y. Mori, Y. Oki, A. Osanai, S. Shiroya, K. Takami, K. Takamiya, T. Takeshita, A. Taniguchi, H. Yashima, H. Yoshino
    KURRI, Osaka
  • M. Ikeda, Y. Kijima
    Mitsubishi Electric Corp, Energy & Public Infrastructure Systems Center, Kobe
  A simple, convenient control system has been developed for a 150 MeV proton FFAG accelerator complex at Research Reactor Institute, Kyoto University(KURRI). This control system is based on conventional PCs and programmable logic controllers (PLC) and these are connected over TCP/IP network. Each PLC is responsible for autonomous control of connected devices such as motors or power supplies, and also responsible for maintaining a parameter database periodic(~100 ms typically) read/written by remote PCs over TCP/IP network. Man-machine interfaces and integrated sequences are developed using LabView environment on these PCs. This control system has been successfully served for the actual operation of the FFAG complex, including the radiation protection control. Further developments, such as portable devices serving man-machine interfaces on site and the integration of SQL server for logging all possible parameters of this accelerator complex, are on the way.  
 
TUPP132 Design, Construction and Low Power RF Tests of the First Module of the ACLIP Linac linac, proton, cyclotron, coupling 1836
 
  • V. G. Vaccaro
    Naples University Federico II, Mathematical, Physical and Natural Sciences Faculty, Napoli
  • C. De Martinis
    Universita' degli Studi di Milano & INFN, Segrate
  • D. Giove
    INFN/LASA, Segrate (MI)
  • M. R. Masullo
    INFN-Napoli, Napoli
  • S. J. Mathot
    CERN, Geneva
  • A. C. Rainò, V. Variale
    INFN-Bari, Bari
  • R. J. Rush
    e2v, Chelmsford, Essex
  ACLIP is a 3 GHz proton SCL linac designed as a booster for a 30 MeV commercial cyclotron. The final energy is 62 MeV well suitable for the therapy of ocular tumours or for further acceleration (up to 230 MeV) by a second linac in order to treat deep seated tumours. The possibility of using magnetrons as the source of RF power, to reduce the overall cost of the machine, is under investigation within a collaboration with the company e2v (Chelmsford, UK). ACLIP is a 5 modules structure coupled together. The first one (able to accelerate proton from 30 to 35 MeV) has been machined and completely the brazed. We plan to have the high power test by early fall 2008. In this paper we will review the main features of the linac and discuss the results of the RF measurements carried out on this prototype.  
 
WEPC004 Design Status of the Taiwan Photon Source dynamic-aperture, lattice, emittance, storage-ring 1986
 
  • C.-C. Kuo, H.-P. Chang, H. C. Chao, P. J. Chou, K. S. Liang, W. T. Liu, G.-H. Luo, A. Rusanov, H.-J. Tsai, J. W. Tsai
    NSRRC, Hsinchu
  We report updated design works for a new 3-3.3 GeV synchrotron light source called Taiwan Photon Source (TPS). The lattice type of the TPS is a 24-cell DBA structure and the circumference is 518.4 m. The injector booster will be housed in the same tunnel. We present the lattice design, the accelerator physics issues and its expected performances.  
 
WEPC005 Design Considerations of the TPS Linac-to-booster Transfer Line linac, injection, kicker, septum 1989
 
  • H.-P. Chang, H. C. Chao, K. T. Hsu, S. Y. Hsu, D.-G. Huang, C.-C. Kuo, K.-K. Lin, W. T. Liu, Y.-C. Liu
    NSRRC, Hsinchu
  Design considerations of the linac to booster (LTB) transfer line for Taiwan Photon Source (TPS) project is described in this report. Electron beam from the linac with 150 MeV, 50 π-mm-mrad normalized emittance and 0.5% energy spread will be transferred to a booster synchrotron of 489.6 m. This LTB transfer line is designed with the flexible tuning capability and the diagnostics are included. Matching of transverse beam parameters from linac to booster is deliberated. The on-axis injection scheme with repetition rate around 2 or 3 Hz and efficiency with beta-mismatch for top-up operation is also studied.  
 
WEPC009 Progress of ALBA storage-ring, vacuum, linac, quadrupole 2001
 
  • D. Einfeld
    ALBA, Bellaterra
  The construction of the ALBA Synchrotron Light Source in Barcelona (Spain) is well advanced. In spring of this year the 100 MeV Linac will be installed and results from the commissioning will be reported on this conference. The different components for the accelerators have successfully completed the prototyping phase and the different series are now under production. Installation of Booster and Storage Ring should start in summer of this year and commissioning is planned for spring 2009. The construction status will be presented.  
 
WEPC039 PLS Upgrade Plan lattice, emittance, insertion, linac 2070
 
  • T.-Y. Lee
    PAL, Pohang, Kyungbuk
  Pohang Light Source (PLS) has operated for 14 year successfully. To meet the request of the increasing user community, an upgrade plan of PLS is under consideration. The design goal is to achieve an emittance as low as 5 nm rad and to install as many insertion devices as possible. To minimize the necessary relocation of existing beamlines, the new lattice will still be a TBA. But, adopting combined function magnets, it is possible to achieve low emittance while the insertion straight is as long as 8.8 m where two insertion devices will be installed. The PLS upgrade plan and the lattice design will be presented in this paper.  
 
WEPC040 Commissioning of the SSRF Booster linac, dipole, electron, synchrotron 2073
 
  • H. H. Li, Q. Gu, D. M. Li, L. G. Liu, D. Wang, Z. T. Zhao
    SINAP, Shanghai
  The SSRF Booster, designed to accelerate the electrons from 150MeV to 3.5GeV, is a FODO structure synchrotron with 180m circumference and 2Hz repetition rate. The commissioning of the SSRF booster from the LTB transfer line started on Sept. 30th evening, 2007, the first turns of beam in the booster was obtained in 20 hours. With about 60 hours effective commissioning effort, the electrons were accelerated to 3.5GeV on October 5th morning, 2007. And then the first 3.5GeV beam was extracted to BTS transfer line on October 30th, 2007. In this paper, the SSRF booster is introduced and its commissioning results are presented.  
 
WEPC043 Commissioning of 360 mA Top-up Operation at TLS injection, feedback, insertion, insertion-device 2082
 
  • Y.-C. Liu, H.-P. Chang, K.-K. Lin, Y. K. Lin, G.-H. Luo
    NSRRC, Hsinchu
  Taiwan light source started the 200 mA top-up operation in October, 2005, and subsequently, the stored top-up beam current was raised to 300 mA. Several machine issues were observed and solved during past two years. We study the possibility and ability of 360 mA top-up operation at Taiwan light source.  
 
WEPC055 General Status of SESAME microtron, controls, storage-ring, power-supply 2115
 
  • H. Tarawneh, T. H. Abu-Hanieh, A. Al-Adwan, M. A. Al-najdawi, A. Amro, M. Attal, D. S. Foudeh, A. Kaftoosian, T. A. Khan, F. Makahleh, S. A. Matalgah, A. M. Mosa Hamad, M. M. Shehab, S. Varnasseri
    SESAME, Amman
  • A. Nadji
    SOLEIL, Gif-sur-Yvette
  An update of the status of SESAME is presented. SESAME is a third generation light source facility under construction in Allan, Jordan. The storage ring electron beam energy is 2.5 GeV, the beam emittance is 26 nm.rad and 12 straight sections are available for Insertion Devices. The injector consists of a 22.5 MeV microtron and 800 MeV booster synchrotron, with a repetition rate of 1 Hz. The SESAME building has been handed over on Dec. 2007 and this note focuses on the upgrade and installation plans for the SESAME injector system during the 2008. In the meantime, preparations of technical specifications for most of the storage ring subsystems are in progress. In this note the conceptual design of the storage ring’s bending magnet, pulsed magnets and their power supplies, RF system, shielding wall and the cooling system are presented. The tendering of these components is expected by mid 2008.  
 
WEPC067 Optics for the ALBA Booster Synchrotron dipole, sextupole, quadrupole, lattice 2148
 
  • G. Benedetti, D. Einfeld, Z. Martí, M. Munoz, M. Pont
    ALBA, Bellaterra
  The ALBA booster is a full energy injector of 3 GeV for top-up operation that will be installed in the same tunnel as the Storage Ring. Its large circumference of 249.6 m and the magnetic lattice with combined function bending magnets provide an equilibrium emittance as low as 9 nm rad. In this paper the linear optics functions, the aperture requirements and the gradient error tolerances in the dipoles and quadrupoles are discussed. The closed orbit correction scheme consists of 44 horizontal and 28 vertical correctors and 44 BPMs. A solution that requires a reduced number of BPMs has been studied as well. Chromaticity correction and dynamic aperture during the ramping have been also investigated. Finally, the injection and extraction schemes are described.  
 
WEPC068 Injection into the ALBA Storage Ring injection, septum, kicker, storage-ring 2151
 
  • G. Benedetti, D. Einfeld, M. Munoz, M. Pont
    ALBA, Bellaterra
  • E. Huttel
    FZK, Karlsruhe
  Injection into the ALBA Storage Ring is performed at an energy of 3 GeV in a 7 m long straight section. The injection bump is performed with four kickers. Pulsed magnets are described, in particular the active septum magnet. Tracking of particles has been simulated over a large number of turns, taking into account the magnet errors, the sextupole fields and the physical apertures all along the machine. Specific requirements for top-up injection have been examined, such as a perfect closure of the injection bump, the residual vertical field and the leakage fields from the septum.  
 
WEPC070 Further Optimisation of the Diamond Light Source Injector injection, linac, klystron, storage-ring 2157
 
  • C. Christou, J. A. Dobbing, V. C. Kempson, A. F.D. Morgan, B. Singh, S. J. Singleton
    Diamond, Oxfordshire
  The Diamond Light Source injector consists of a 100MeV linac and a 3GeV full-energy booster, and has been providing beam to the storage ring since September 2006. System optimisation has continued throughout the first year of user operation at Diamond. Beam losses on injection into both the booster and storage ring have been minimised by optimisation of operating parameters and the stabilisation of injection elements, particularly the elimination of a linac energy beat. High level software has been developed to monitor turn-by-turn BPM data, allowing booster chromaticity to be measured. The same software generates an automatic log of storage ring frequency spectra on injection, enabling the parasitic measurement of storage ring tune, and can be used to provide information on storage ring impedance and chromaticity. Further optimisation of single bunch injection has been carried out in preparation for top-up operation, and top-up capability has been extended to provide a single bunch filling mode for the storage ring. Injection into the booster at low energy has been demonstrated, providing a mode of operation for the injection system in the event of a linac klystron failure.  
 
WEPC071 Installation and Commissioning of the 100 MeV Preinjector Linac of the New Elettra Injector gun, linac, klystron, electron 2160
 
  • G. D'Auria, P. Borsi, A. Carniel, P. Delgiusto, O. Ferrando, A. Franceschinis, M. M. Milloch, A. Milocco, F. Pribaz, N. Sodomaco, M. Stefanutti, L. Veljak, D. Wang
    ELETTRA, Basovizza, Trieste
  • L. Picardi, C. Ronsivalle
    ENEA C. R. Frascati, Frascati (Roma)
  A new full energy injector has been installed and commissioned at Sincrotrone Trieste, the Italian Synchrotron Light Source Facility in Trieste. It consists of a 100 MeV Preinjector Linac (PL) followed by a 2.5 GeV Booster Synchrotron (BS), that will fill the Elettra Storage Ring (SR) with 2.0 GeV and 2.4 GeV electrons. Here a complete description of the preinjector linac and its characterization in terms of beam parameters will be presented and discussed.  
 
WEPC074 The Injection and Extraction Kicker Magnets of the Elettra Booster extraction, kicker, vacuum, injection 2166
 
  • R. Fabris, G. Pangon
    ELETTRA, Basovizza, Trieste
  The design, realization and performance of the injection and extraction Kicker magnets of the Booster of Elettra are presented. A window-frame geometry has been chosen due to its transverse symmetry in order to obtain a good field symmetry. A suitable layout for in vacuum operation has been developed. The magnetic core is made by CMD 5005 ferrite blocks, assembled in a stainless steel case, obtaining a single module; one module has been used for the injection Kicker and two such modules, connected in parallel, have been used for the extraction Kicker. In both cases the magnet modules have been installed in stainless steel vacuum chambers. The design of the magnetic core has been checked using the well known 2D POISSON code, thanks to the fact that the magnet’s gap is narrow compared to its length.  
 
WEPC078 Eddy Current Septum Magnets for Booster Injection and Extraction and Storage Ring Injection at SSRF septum, injection, storage-ring, vacuum 2177
 
  • M. G. Gu, R. Chen, Z. H. Chen, B. Liu, L. Ouyang
    SINAP, Shanghai
  There are 6 in-vacuum eddy current septum magnets used for injection and extraction in the SSRF booster and storage ring. The booster extraction thick septum magnets generate magnetic field over 1 Tesla, special attentions were paid to coils and their support design because of the shock force and the high heat which is hard to be dissipated in vacuum environment. The good transverse homogeneity in the gap has been achieved by careful design, precise machining and accurate assembly. An extremely low leakage field on the stored beam is another key feature of these magnets thanks to the high permeability Mu metal. Magnetic field measurement was conducted with both point coil and long integral coil, and the results agreed well with the OPERA-2d/3d simulations. An inner tube with RF finger flanges at each end is added to keep the continuity of impedance for the circulating beam. There is no vacuum separation between the inner tube and magnet chamber.  
 
WEPC079 Elettra Booster Commissioning and Operation injection, storage-ring, optics, emittance 2180
 
  • F. Iazzourene
    ELETTRA, Basovizza, Trieste
  The new injector, consisting of a 100MeV linac and a 2.5GeV booster synchrotron, replaced the old limited energy 1.2GeV linac by the end of 2007*. The paper reports on its commissioning phases and results together with its present status of operation.

*"Overview of the Status of the Elettra Booster Project", WEPC090, these proceedings.

 
 
WEPC083 Status of the SSRF Booster injection, dipole, extraction, power-supply 2189
 
  • D. M. Li, H. W. Du, H. H. Li, Z. T. Zhao
    SINAP, Shanghai
  The SSRF booster is a 2Hz electron synchrotron. It accelerates electrons, coming from a 150 MeV linac, to a final energy of 3.5 GeV in 250ms and extracts them into the storage ring. The booster lattice is based on a FODO structure with missing dipoles, forming 28 cells with 8 straight sections of a 2-folder symmetry and 180m circumference. The SSRF injector (Include 150 MeV linac, booster and two transport lines) was designed for Top-Up injection, which has single-bunch and multi-bunch beam modes. After 9 months installation and pre-commissioning, the SSRF booster commissioning started on September 30, 2007. The first 3.5GeV beam was obtained On Oct.5, and the first extracted beam was obtained on Oct.29, 2007. The booster serves as a injector for storage ring from Dec. 21, 2007. In this paper, the design, installation and commissioning of the SSRF booster and transport lines are described.  
 
WEPC089 Status of the NSLS-II Injection System Design injection, storage-ring, linac, lattice 2198
 
  • T. V. Shaftan, A. Blednykh, G. Ganetis, W. Guo, R. Heese, H.-C. Hseuh, E. D. Johnson, S. Krinsky, Y. J. Li, R. Meier, S. Ozaki, I. Pinayev, M. Rehak, J. Rose, S. Sharma, O. Singh, J. Skaritka, N. Tsoupas, F. J. Willeke, L.-H. Yu
    BNL, Upton, New York
  NSLS-II is a new ultra-bright 3rd generation 3GeV light source planned to be built at Brookhaven National Laboratory. The design of this facility is well under way. The requirement for the compact injector complex which has to continuously provide 3GeV electrons for top off injection into the storage ring is very demanding: high reliability, low loss, relatively high charge (10nC). The injector consists of linear accelerator, a full-energy booster, as well as transport lines and injection straight section. A large three dimensional dynamic aperture through the entire acceleration cycle in the booster synchrotron is required. Tolerances on pulsed magnets for the beam transfer are very tight in order to minimize injection losses and disturbance of the stored beam in the main ring. The components of the injector are optimized for high reliability and availability. In this paper we give an overview of the NSLS-II injector, discuss status, specifications and design challenges.  
 
WEPC090 Overview of the Status of the Elettra Booster Project linac, injection, storage-ring, extraction 2201
 
  • M. Svandrlik
    ELETTRA, Basovizza, Trieste
  The Elettra Booster Project is in its final phase. The 100 MeV linac pre-injector and the 2.5 GeV booster were constructed and installed on schedule and within the foreseen budget. Elettra was shut down during the last autumn to switch from the old linac injector to the new booster. The new 2.5 GeV transfer line was successfully connected to the storage ring by December 2007. During the same period the booster commissioning was started. Operation for users of the light source, with the booster as injector, is scheduled in March 2008. An overview of the booster systems and of the current status of its commissioning and operation is presented and discussed here.  
 
WEPC139 Recent Experience in the Fabrication and Brazing of Ceramic Beam Tubes for Kicker Magnets at FNAL kicker, vacuum, controls, background 2335
 
  • C. R. Ader, C. C. Jensen, R. E. Reilly, D. Snee, J. H. Wilson
    Fermilab, Batavia, Illinois
  Ceramic beam tubes are utilized in numerous kicker magnets in different accelerator rings at Fermi National Accelerator Laboratory. Kovar flanges are brazed onto each beam tube end, since kovar and high alumina ceramic have similar expansion curves. The tube, kovar flange, end piece, and braze foil (titanium/inconel) alloy brazing material are stacked in the furnace and then brazed in the furnace at 1000°C. The ceramic specified is Alumina 99.8% Al2O3, a strong recrystalized high-alumina fabricated by slip casting. Recent experience at Fermilab with the fabrication and brazing of these tubes has brought to light numerous problems including tube breakage and cracking and also the difficulty of brazing the tube to produce a leak-tight joint. These problems may be due to the ceramic quality, voids in the ceramic, thinness of the wall, and micro-cracks in the ends which make it difficult to braze because it cannot fill tiny surface cracks which are caused by grain pullout during the cutting process. Solutions which are being investigated include lapping the ends of the tubes before brazing to eliminate the micro-cracks and also metallization of the tubes.  
 
WEPC141 Septa and Distributor Developments for H- Injection into the Booster from Linac4 vacuum, linac, injection, septum 2338
 
  • J. Borburgh, B. Balhan, T. Fowler, M. Hourican, W. J.M. Weterings
    CERN, Geneva
  The construction of Linac4 requires the modification of the existing injection system of the CERN PS Booster. A new transfer line will transport 160 MeV H- ions to this machine. A system of 5 pulsed magnets (BIDIS) and 3 vertical septa (BISMV) will distribute and inject the Linac pulses into the four-vertically separated Booster rings. Subsequently the beam will be injected horizontally, using a local bump created with bumpers (BS magnets) to bring the injected H- beam together with the orbiting proton beam onto the stripper foil. To accommodate the injected H- beam, the first of the BS magnets will have to be a septum like device, deflecting only the orbiting beam. This paper highlights the requirements and technical issues and describes the solutions to be adopted for both the BIDIS and BISMV. The results of initial prototype testing of the BIDIS magnet will also be presented.  
 
WEPC144 Test Results of the AC Field Measurements of Fermilab Booster Corrector Magnets quadrupole, dipole, sextupole, pick-up 2347
 
  • J. DiMarco, D. J. Harding, V. S. Kashikhin, S. Kotelnikov, M. J. Lamm, A. Makulski, R. Nehring, D. F. Orris, P. Schlabach, C. Sylvester, M. Tartaglia, J. C. Tompkins, G. Velev
    Fermilab, Batavia, Illinois
  Multi-element corrector magnets are being produced at Fermilab that will enable correction of orbits and tunes through the entire cycle of the Booster, not just at injection. The corrector package includes six different corrector elements - normal and skew orientations of dipole, quadrupole, and sextupole - each independently powered. The magnets have been tested during typical AC ramping cycles at 15Hz using a fixed coil system to measure the dynamic field strength and field quality. The fixed coil is comprised of an array of inductive pick-up coils around the perimeter of a cylinder which are sampled simultaneously at 100kHz with 24-bit ADC’s. The performance of the measurement system and a summary of the field results are presented and discussed.  
 
WEPC145 A Fast-sampling, Planar Array for Measuring the AC Field of Fermilab Pulsed Extraction Magnets linac, extraction, pick-up, dipole 2350
 
  • J. DiMarco, C. Johnstone, O. Kiemschies, S. Kotelnikov, M. J. Lamm, A. Makulski, R. Nehring, D. F. Orris, A. D. Russell, M. Tartaglia, G. Velev, D. G.C. Walbridge, A. Yuan
    Fermilab, Batavia, Illinois
  A system employing a planar array of inductive pick-up coils has been developed for measurements of the rapidly changing dipole field in pulsed extraction magnets of the Fermilab MuCool project. The magnets are of C-type design, and have a peak field of 0.65 T during 8.33 millisecond half-sine pulse with 15 Hz repetition rate. The coils of the measurement system are fabricated on a single, 97.5 mm wide, 2-layer circuit board. The top layer of the circuit board has 15 unbucked coils distributed over its width. The bottom layer has a similar arrangement of coils, except each is bucked against the central winding to suppress the main dipole field and allow for more sensitive measurements of higher-order harmonics across the magnet mid-plane. The array of coils is simultaneously sampled at data rates of up to 100kHz with 10kHz bandwidth using 24-bit ADC’s. A detailed overview of the system and data analysis is presented, along with a characterization of results and system performance.  
 
THPC005 Conceptual Design of Booster Synchrotron forTPS emittance, lattice, storage-ring, quadrupole 2981
 
  • H. C. Chao, H.-P. Chang, P. J. Chou, C.-C. Kuo, G.-H. Luo, H.-J. Tsai, J. W. Tsai
    NSRRC, Hsinchu
  A six-folded concentric booster of 489.6 m with non-dispersive straights of length 5.8 m is designed for TPS storage ring of 518.4 m. The structure consists of modified FODO lattice with defocusing quadrupole fields built in bending magnets. The designed emittance is less than 10 nm-rad at 3 GeV. In this paper, the phenomenon during the ramping from 150 MeV to 3.0 GeV including the eddy current effect, the evolutions of beam emittance, energy spread, and bucket acceptance, will be discussed. In addition, closed orbit correction scheme, aperture request as well as injection and extraction schemes are described.  
 
THPC065 Orbit Stability Status and Improvement at SOLEIL feedback, power-supply, target, injection 3134
 
  • L. S. Nadolski, J. C. Besson, F. Bouvet, P. Brunelle, L. Cassinari, J.-C. Denard, J.-M. Filhol, N. Hubert, J.-F. Lamarre, A. Loulergue, A. Nadji, D. Pedeau, M.-A. Tordeux
    SOLEIL, Gif-sur-Yvette
  SOLEIL is a 2.75 GeV third generation synchrotron light source delivering photons to beam-lines since January 2007. Stability of the beam-line source points is crucial for the user experiments. Typically this stability has to be below one tenth of the transverse beam sizes. This is challenging especially in the vertical plane leading to sub-micrometer values. This paper will describe the position stability achieved today without and with the slow orbit feedback. Impact of different noise sources and present limitations will be described. To end an improvement strategy will be given for short and medium terms.  
 
THPC153 Timing System of the New Elettra Injector injection, extraction, storage-ring, gun 3351
 
  • S. Bassanese, A. Carniel, R. De Monte, M. Ferianis, G. Gaio
    ELETTRA, Basovizza, Trieste
  A new timing system has been developed to operate the new injector for the Elettra storage ring. It implements a versatile injection system to support standard and exotic fillings as well as the top-up mode of operation. Based on an in-house developed programmable counter VME board, the system provides all the needed triggers by the pre-injector LINAC, the booster injection, the booster ramping system, the booster extraction, and the SR injection. An overview of the system architecture and functionality is described and the performance of the board is reported. All the trigger signals are distributed to the timing clients by means of optical links.  
 
THPC162 The SSRF Timing System linac, controls, injection, storage-ring 3369
 
  • L. Y. Zhao, D. K. Liu, C. X. Yin
    SINAP, Shanghai
  In the Shanghai Synchrotron Radiation Facility (SSRF), various equipment in the 150MeV linac, the full energy booster and the 3.5GeV storage ring need to be triggered and synchronized by a low jitter timing system. An event system based on distribution network is implemented in the SSRF timing system. In this paper, the software and hardware structure of the SSRF timing system are described and the system performance is presented.  
 
THPP122 Fast High-Power Power Supply for Scanning Magnets of CNAO Accelerator controls, power-supply, synchrotron, dipole 3643
 
  • M. Incurvati
    OCEM spa, San Giorgio di Piano Bologna
  • F. Burini, M. F. Farioli, G. Taddia
    O. C.E. M. S.p. A., Bologna
  • I. De Cesaris, C. Sanelli, F. Voelker
    INFN/LNF, Frascati (Roma)
  • M. Donetti, S. Toncelli
    CNAO Foundation, Milan
  • S. Giordanengo, F. Marchetto
    INFN-Torino, Torino
  • G. Venchi
    University of Pavia, Pavia
  The paper presents the design aspects and performance measurements of the CNAO Scanning Magnets’ power supply (PS) rated ±550A/±660V and developed in collaboration between OCEM SpA and INFN-CNAO. CNAO is a medical synchrotron producing carbon ions and protons for the cure of deep tumours. The Scanning Magnets are dipole magnets used to move the beam in an x-y plane at the very end of the beam extraction line. The PS current will be set in order to cover the targeted tumour area. To accomplish such a task the specifications of the PS are very stringent: current ramp speed is required to be as fast as 100 kA/s with an overall precision class of 100 ppm. Moreover the wide (20x20 cm2) area to be covered by the beam requires a wide current range. High voltage peaks are required during transients whereas low voltage is needed during steady state. The above characteristics are challenging design issues both with respect to topology and control optimization.  
 
THPP123 Ramping Power Supplies for the SSRF Booster power-supply, controls, dipole, feedback 3646
 
  • R. Li, H. G. Chen, D. M. Li, S. L. Lu, T. J. Shen, D. X. Wang
    SINAP, Shanghai
  The SSRF booster magnetic field ramped with a 250ms ramp, 2Hz cycle rate, and biased quasi-sinusoidal wave shape is successfully realized. Two Digital Switch-mode Power Supplies (DSPS) separately deliver currents to all dipoles, and other four DSPS deliver to the quadrupoles and sextupoles in families. Tracking precision and reducing line power fluctuation requirements are particularly challenging because of the fast ramp and high inductance load. In order to meet the requirements, the magnetic energy recycle, digital regulation and novel PID correction circuit are used. On Oct. 5th 2007, after a few days commissioning of the SSRF booster, the beam was boosted up to 3.5GeV firstly in SSRF, it proved that the design of ramping power supplies was correct and the manufacture was successful. The power supply system and its performance are described in this paper.  
 
THPP125 Performance Evaluation of the Switching Mode AC Power Supply power-supply, controls, dipole, impedance 3652
 
  • C.-Y. Liu, Y.-C. Chien, H. M. Shih
    NSRRC, Hsinchu
  In order to improve the injection efficiency, the output current waveform of the AC power supplies must be great. Therefore, to ensure smooth and efficient injection of the booster ring, the phase jitter of the AC power supplies current must be less than ±4ns. A new AC power supply is constructed and employ IGBT modules operating at higher switching frequency than the old GTO-based system for the dipole magnet. This new power supply will not only improve the phase jitter but also increase the operating efficiency than the old power supply. The measured dynamic range of the of the 10 Hz sine wave current output is better than 75dB and phase jitter is less than ±4ns. The improved performance evaluation is illustrated in the paper.  
 
THPP130 SSRF Magnet Power Supply System power-supply, storage-ring, dipole, controls 3667
 
  • T. J. Shen, H. G. Chen, C. L. Guo, Z. M. Hu, M. M. Huang, D. M. Li, R. Li, H. Liu, S. L. Lu, D. X. Wang, W. F. Wu, R. N. Xu, S. M. Zhu, Y. Y. Zhu
    SINAP, Shanghai
  The Shanghai Synchrotron Radiation Facility (SSRF) is a third-generation synchrotron radiation light source. In SSRF, there are 520 sets of magnet power supplies for the storage ring and 163 sets for injector. All of the power supplies are in PWM switched mode with IGBT. A high precision stable output power supply for 40 dipoles rated at 840A/800V with the stability of ±2·10-5/8hrs is used for the storage ring. 200 sets of chopper type power supplies are used for exciting main winding of quadrupoles independently. In the booster, two sets of dynamic power supplies for dipoles and two sets for quadrupoles run at the biased 2Hz quasi-sinusoidal wave. All above power supplies work with digital power supply controllers designed by either PSI or SINAP. All power supplies are manufactured at professional power supply companies in China.  
 
THPP133 Magnet Power Converters for the New Elettra Full Energy Injector dipole, quadrupole, controls, storage-ring 3673
 
  • R. Visintini, G. Cautero, M. Cautero, D. M. Molaro, M. Svandrlik, M. Zaccaria
    ELETTRA, Basovizza, Trieste
  A large number of power converters has been required to supply the coils and the magnets of the four sub-structures of the new Elettra full energy injector. The Linac, and the two transfer lines require highly stabilized DC power converters while the Booster has to be operated at 3 Hz supplying the magnets with sinusoidal current waveforms. The extraction Bumpers require slow pulse supplies. In order to keep all output voltages below 1 kV, a special connection has been adopted for the Booster dipoles. A particular type of low power four-quadrant converters with embedded Ethernet connection has been designed at Elettra for this specific project. The article will present the relevant facts about the different power converters and their performances.  
 
THPP148 Implementation of the SSRF Vacuum Control System controls, vacuum, power-supply, ion 3714
 
  • H. F. Miao, W. Li, Y. J. Liu, L. R. Shen
    SINAP, Shanghai
  The Shanghai Synchrotron Radiation Facility (SSRF) is a third generation light source consisting of a 150MeV linac, a full energy booster and a 3.5GeV storage ring. The vacuum control system is a standard hierarchical control system based on EPICS. Serial device servers are used to connect most of vacuum devices such as gauge controllers, pump power supplies to the control network directly and integrated with EPICS using soft IOC. Ethernet based PLC systems are adopted for the valves control, temperature monitor, etc. The soft IOCs are running on the rack servers and the VLAN is used for separate to the other systems. An enhanced distributed archive engine stores runtime data to centre database that using native XML data type with XML schema for data storage. It is a high performance system and running well for daily operation now.