Keyword: storage-ring
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MOPKS001 Diamond Light Source Booster Fast Orbit Feedback System booster, controls, feedback, synchrotron 160
  • S. Gayadeen, S. Duncan
    University of Oxford, Oxford, United Kingdom
  • C. Christou, M.T. Heron, J. Rowland
    Diamond, Oxfordshire, United Kingdom
  The Fast Orbit Feedback system that has been installed on the Diamond Light Source Storage ring has been replicated on the Booster synchrotron in order to provide a test bed for the development of the Storage Ring controller design. To realise this the Booster is operated in DC mode. The electron beam is regulated in two planes using the Fast Orbit Feedback system, which takes the beam position from 22 beam position monitors for each plane, and calculates offsets to 44 corrector power supplies at a sample rate of 10~kHz. This paper describes the design and realization of the controller for the Booster Fast Orbit Feedback, presents results from the implementation and considers future development.  
poster icon Poster MOPKS001 [0.597 MB]  
MOPKS006 Application of Integral-Separated PID Algorithm in Orbit Feedback feedback, controls, closed-orbit, simulation 171
  • K. Xuan, X. Bao, C. Li, W. Li, G. Liu, J.G. Wang, L. Wang
    USTC/NSRL, Hefei, Anhui, People's Republic of China
  The algorithm in the feedback system has important influence on the performance of the beam orbit. PID algorithm is widely used in the orbit feedback system; however the deficiency of PID algorithm is big overshooting in strong perturbations. In order to overcome the deficiencies, Integral Separated PID algorithm is developed. When the closed orbit distortion is too large, it cancels integration action until the closed orbit distortions are lower than the threshold value. The implementation of Integral Separated PID algorithm with MATLAB is described in this paper. The simulation results show that this algorithm can improve the control precision.  
poster icon Poster MOPKS006 [0.091 MB]  
MOPKS012 Design and Test of a Girder Control System at NSRRC controls, laser, network, interface 183
  • H.S. Wang, J.-R. Chen, M. L. Chen, K.H. Hsu, W.Y. Lai, S.Y. Perng, Y.L. Tsai, T.C. Tseng
    NSRRC, Hsinchu, Taiwan
  A girder control system is proposed to quickly and precisely adjust the displacement and rotating angle of all girders in the storage ring with little manpower at the Taiwan Photon Source (TPS) project at National Synchrotron Research Center (NSRRC). In this control girder system, six motorized cam movers supporting a girder are driven on three pedestals to perform six-axis adjustments of a girder. A tiltmeter monitors the pitch and roll of each girder; several touch sensors measure the relative displacement between consecutive girders. Moreover, a laser position sensitive detector (PSD) system measuring the relative displacement between straight-section girders is included in this girder control system. Operator can use subroutines developed by MATLAB to control every local girder control system via intranet. This paper presents details of design and tests of the girder control system.  
MOPKS014 Architecture and Control of the Fast Orbit Correction for the ESRF Storage Ring network, FPGA, controls, device-server 189
  • F. Epaud, J.M. Koch, E. Plouviez
    ESRF, Grenoble, France
  Two years ago, the electronics of all the 224 Beam Position Monitors (BPM) of the ESRF Storage Ring were replaced by the commercial Libera Brilliance units to drastically improve the speed and position resolution of the Orbit measurement. Also, at the start of this year, all the 96 power supplies that drive the Orbit steerers have been replaced by new units that now cover a full DC-AC range up to 200Hz. We are now working on the replacement of the previous Fast Orbit Correction system. This new architecture will also use the 224 Libera Brilliance units and in particular the 10 KHz optical links handled by the Diamond Communication Controller (DCC) which has now been integrated within the Libera FPGA as a standard option. The 224 Liberas are connected together with the optical links to form a redundant network where the data are broadcast and are received by all nodes within 40 μS. The 4 corrections stations will be based on FPGA cards (2 per station) also connected to the FOFB network as additional nodes and using the same DCC firmware on one side and are connected to the steerers power supplies using RS485 electronics standard on the other side. Finally two extra nodes have been added to collect data for diagnostics and to give BPMs positions to the beamlines at high rate. This paper will present the network architecture and the control software to operate this new equipment.  
poster icon Poster MOPKS014 [3.242 MB]  
MOPMN015 Multi Channel Applications for Control System Studio (CSS) controls, EPICS, operation, database 271
  • K. Shroff, G. Carcassi
    BNL, Upton, Long Island, New York, USA
  • R. Lange
    HZB, Berlin, Germany
  Funding: Work supported by U.S. Department of Energy
This talk will present a set of applications for CSS built on top of the services provided by the ChannelFinder, a directory service for control system, and PVManager, a client library for data manipulation and aggregation. ChannelFinder Viewer allows for the querying of the ChannelFinder service, and the sorting and tagging of the results. Multi Channel Viewer allows the creation of plots from the live data of a group of channels.
poster icon Poster MOPMN015 [0.297 MB]  
TUCAUST03 The Upgrade Programme for the ESRF Accelerator Control System controls, TANGO, software, insertion 570
  • J.M. Meyer, J.M. Chaize, F. Epaud, F. Poncet, J.L. Pons, B. Regad, E.T. Taurel, B. Vedder, P.V. Verdier
    ESRF, Grenoble, France
  To reach the goals specified in the ESRF upgrade program [1], for the new experiments to be built, the storage ring needs to be modified. The optics must to be changed to allow up to seven meter long straight sections and canted undulator set-ups. Better beam stabilization and feedback systems are necessary for the nano-focus experiments planned. Also we are undergoing a renovation and modernization phase to increase the lifetime of the accelerator and its control system. This paper resumes the major upgrade projects, like the new BPM system, the fast orbit feedback or the ultra small vertical emittance, and their implications on the control system. Ongoing modernization projects such as the solid state radio frequency amplifier or the HOM damped cavities are described. Software upgrades of several sub-systems like vacuum and insertion devices, which are planned for this year or for the long shutdown period beginning of 2012 are covered as well. The final goal is to move to a Tango only control system.
slides icon Slides TUCAUST03 [1.750 MB]  
WEPKN014 NSLS-II Filling Pattern Measurement controls, EPICS, diagnostics, linac 735
  • Y. Hu, L.R. Dalesio, K. Ha, I. Pinayev
    BNL, Upton, Long Island, New York, USA
  Multi-bunch injection will be deployed at NSLS-II. High bandwidth diagnostic monitors with high-speed digitizers are used to measure bunch-by-bunch charge variation. The requirements of filling pattern measurement and layout of beam monitors are described. The evaluation results of commercial fast digitizer Agilent Acqiris and high bandwidth detector Bergoz FCT are presented.  
poster icon Poster WEPKN014 [0.313 MB]  
WEPKN018 NSLS-II Vacuum Control for Chamber Acceptance vacuum, controls, ion, multipole 742
  • H. Xu, L.R. Dalesio, M.J. Ferreira, H.-C. Hseuh, D. Zigrosser
    BNL, Upton, Long Island, New York, USA
  Funding: Work supported by U.S. Department of Energy
The National Synchrotron Light Source II (NSLS-II) uses extruded aluminium chambers as an integral part of the vacuum system. Prior to installation in the Storage Ring all dipole and multipole chamber assemblies must be tested to ensure vacuum integrity. A significant part of the chamber test requires a full bakeout of the assembly, as well as control and monitoring of the titanium sublimation pumps (TSP), non-evaporable getter pumps (NEG) and ion pumps (IP). Data that will be acquired by the system during bakeouts includes system temperature, vacuum pressure, residual gas analyzer scans, ion pump current, TSP operation and NEG activation. This data will be used as part of the acceptance process of the chambers prior to the installation in the storage ring tunnel. This paper presents the design and implementation of the vacuum bakeout control, as well as related vacuum control issues.
poster icon Poster WEPKN018 [1.174 MB]  
WEPMS015 NSLS-II Booster Timing System injection, booster, timing, extraction 1003
  • P.B. Cheblakov, S.E. Karnaev
    BINP SB RAS, Novosibirsk, Russia
  • J.H. De Long
    BNL, Upton, Long Island, New York, USA
  The NSLS-II light source includes the main storage ring with beam lines and injection part consisting of 200 MeV linac, 3 GeV booster synchrotron and two transport lines. The booster timing system is a part of NSLS-II timing system which is based on Event Generator (EVG) and Event Receivers (EVRs) fromμResearch Finland. The booster timing is based on the external events coming from NSLS-II EVG: "Pre-Injection", "Injection", "Pre-Extraction", "Extraction". These events are referenced to the specified bunch of the Storage Ring and correspond to the first bunch of the booster. EVRs provide two scales for triggering both of the injection and the extraction pulse devices. The first scale provides triggering of the pulsed septums and the bump magnets in the range of milliseconds and uses TTL outputs of EVR, the second scale provides triggering of the kickers in the range of microseconds and uses CML outputs. EVRs also provide the timing of a booster cycle operation and events for cycle-to-cycle updates of pulsed and ramping parameters, and the booster beam instrumentation synchronization. This paper describes the final design of the booster timing system. The timing system functional and block diagrams are presented.  
poster icon Poster WEPMS015 [0.799 MB]  
WEPMS026 The TimBel Synchronization Board for Time Resolved Experiments at Synchrotron SOLEIL synchrotron, experiment, electron, FPGA 1036
  • J.P. Ricaud, P. Betinelli-Deck, J. Bisou, X. Elattaoui, C. Laulhé, P. Monteiro, L.S. Nadolski, S. Ravy, G. Renaud, M.G. Silly, F. Sirotti
    SOLEIL, Gif-sur-Yvette, France
  Time resolved experiments are one of the major services that synchrotrons can provide to scientists. The short, high frequency and regular flashes of synchrotron light are a fantastic tool to study the evolution of phenomena over time. To carry out time resolved experiments, beamlines need to synchronize their devices with these flashes of light with a jitter shorter than the pulse duration. For that purpose, Synchrotron SOLEIL has developed the TimBeL board fully interfaced to TANGO framework. This paper presents the main features required by time resolved experiments and how we achieved our goals with the TimBeL board.  
poster icon Poster WEPMS026 [1.726 MB]