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insertion

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TOPA03 The IRMIS Universal Component-Type Model controls, factory, site, power-supply 82
 
  • D. Dohan
    ANL, Argonne, Illinois
  The IRMIS toolkit provides a relational description of the accelerator/facility hardware and how it is assembled. To create this relational model, the APS site infrastructure was successively partitioned until a set of familiar, "unit-replaceable" components was reached. These items were grouped into a set of component types, each characterized by the type's function, form factor, etc. No accelerator "role" was assigned to the components, resulting in a universal set of component types applicable to any laboratory or facility. This paper discusses the development of the universal component-type model. Extension of the component types to include port definitions and signal-handling capabilities will be discussed. This signal-handling aspect provides the primary mechanism for relating control system software to accelerator hardware. The schema is being extended to include references to the device support for EPICS-supported component types. This suggests a new approach to EPICS database configuration in which the user, after selecting a particular hardware component, is provided with links to the support software to be used in building the EPICS application.  
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TPPB41 NSLS II Control System Overview controls, feedback, power-supply, SNS 253
 
  • L. R. Dalesio
    SLAC, Menlo Park, California
  The NSLS II is a new light source to be built at Brookhaven National Laboratory. The control system tools will be started this year. Technical areas of interest to improve productivity, maintainability, and performance, include Relational Database tools to support all aspects of the project, online Bbam modelling, intelligent distributed device controllers, and engineering and operation tools. We will discuss our goals and projects to make progress in these areas.  
 
WOAB04 Web-Based Electronic Operation Log System – Zlog System controls, background, linac, vacuum 299
 
  • K. Furukawa, T. T. Nakamura, T. Obina, M. Satoh, N. Yamamoto
    KEK, Ibaraki
  • T. Nakamura, K. Yoshii
    MELCO SC, Tsukuba
  A Zope-based electronic operation logging system, named Zlog system, has been used since January 2004 at the KEKB and PF-AR accelerator facilities at KEK. Zope* is a Web content management system, which is based on several open source software components like Python and Postgresql. It enabled us to develop our Zlog in a short period, because the Zope system includes a development framework for Web application server. Zlog was introduced also to J-PARC/KEK-JAEA and RIBF/RIKEN, based on the experiences at KEKB and PF-AR. Zlog was proved to be quite portable even under different computer architectures. Zlog at KEKB accumulates about 1.5 million event entries so far, and images taken during the operation can be stored and viewed as well with entries. In this paper, we describe the present status and component details of the Zlog system.

* http://www.zope.org/

 
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WPPA13 Upgrade of Corrector Power Supplies for Pohang Light Source power-supply, feedback, controls, insertion-device 342
 
  • J. Choi, K. M. Ha, J. Y. Huang, S.-H. Jeong, H.-S. Kang, S.-C. Kim, J.-H. Suh, I. S. Ko
    PAL, Pohang, Kyungbuk
  There are 70 vertical and 70 horizontal correctors for Pohang Light Source. Until 2003, power supplies for these correctors were based on 1980’s technology, so the global orbit feedback system was not possible with poor 12-bit resolution. In 2003, a task force team was assembled to develop new power supplies with BESSY type ADC cards. By Summer 2004, two vertical correctors in each lattice were connected with new power supplies, and the global orbit feedback was available within the accuracy of 5 microns. However, this replacement was not enough to satisfy the beam stability requirement of 2 microns for PLS. We have launched another power supply design based on all digital technology. This attempt was completed within a year, and 80 units were assembled in house. Currently, the global orbit feedback system is running successfully with new digital power supplies and the compensation of chamber motion due to the thermal load by using digital displacement transducers attached on each BPMs.  
 
ROPA02 The High Performance Database Archiver for the LHC Experiments controls, simulation, background, collider 517
 
  • M. Gonzalez-Berges
    CERN, Geneva
  Each of the Large Hadron Collider (LHC) experiments will be controlled by a large distributed system built with the SCADA tool PVSS. There will be about 150 computers and millions of input/output channels per experiment. The values read from the hardware, alarms generated, and user actions will be archived for the physics analysis and for the debugging of the control system itself. Although the original PVSS implementation of a database archiver was appropriate for standard industrial use, the performance was not enough. A collaboration was set up between CERN and ETM, the company that develops PVSS. Changes in the architecture and several optimizations were made and tested in a system of a comparable size to the final ones. As a result we have been able to improve the performance by more than one order of magnitude, and what is more important, we now have a scalable architecture based on the Oracle clustering technology (Real Application Cluster or RAC). This architecture can deal with the requirements for insertion rate, data querying, and manageability of the high volume of data (e.g., an insertion rate of > 150,000 changes/s was achieved with a 6-node RAC cluster).  
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ROPA03 ANTARES Slow Control Status controls, monitoring 520
 
  • J. M. Gallone
    IPHC, Strasbourg Cedex 2
  ANTARES is a neutrino telescope project based on strings of Cerenkov detectors in deep sea. These detectors are spread over a volume of 1 km3 at a depth of about 2 km in the Mediterranean Sea near Toulon. About 400 of such detectors are now operational, as well as a large variety of instruments that need a reliable and accurate embedded slow control system. Based on Commodity Off-the-Shelf (COTS) low-power integrated processors and industry standards such as Ethernet and ModBus, the foreseen system is expected to run for 3 years without any direct access to the hardware. We present the system architecture and some performance figures. The slow control system stores the state of the system at any time in a database. This state may be analyzed by technical staff in charge of the maintenance, physicists to check the setup of the experiment, or the data acquisition system for saving experimental conditions. The main functions of the slow control system are to give a record of the state of the whole system, to set the value of a parameter of a physical device, to modify the value of a parameter of a physical device, and to set up the initial values of the physical devices.  
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RPPA10 Status of the Diamond Fast Orbit Feedback System feedback, controls, power-supply, insertion-device 535
 
  • M. G. Abbott, J. A. Dobbing, M. T. Heron, I. P.S. Martin, G. Rehm, I. Uzun, J. Rowland
    Diamond, Oxfordshire
  • S. Duncan
    University of Oxford, Oxford
  We present the development of transverse orbit stability control at Diamond. We discuss the low latency feedback loop required to effectively suppress high-frequency noise, which informs the choice of network topology and processing units. We explore the use of the field-programmable gate array in the Libera beam position monitor as a communication controller and the vector unit of the PowerPC G4 in the compensator. System models and results from preliminary tests on the machine are shown.  
 
RPPA29 A Feed-Forward Procedure to Counteract Orbit Distortions and Photon Beam Displacements from Insertion Device Operation at the SLS photon, insertion-device, electron, undulator 573
 
  • T. Schmidt, A. Streun, D. Zimoch, J. T.M. Chrin
    PSI, Villigen
  Insertion devices of various types provide light of high brilliance to experimenters at the SLS beamlines. Changes in the photon energy and polarization by movement of the ID gap and phase shift, however, cause orbit distortions that result in a displacement of the photon beam in both angle and position at the beamline. A feed-forward correction scheme has been developed to quantify and precisely correct these effects using designated correctors local to the photon source. The corrector settings are determined using an orbit configuration consisting of 73 digital BPMs and associated correctors; recently commissioned X-ray BPMs located at the beamline front-end are also included in the correction algorithmn and serve to constrain the photon beam to its specified position. The feed-forward table is finally implemented at the local processor level and applied at a rate of 10 Hz. A photon pointing stability at the sub-microradian level is achieved. The entire gap scan, feed-forward generation and subsequent verification can now be completed within 15 to 60 minutes depending on the complexity of the ID. The methodology of the procedure and high-level software framework is described.  
 
RPPB16 SPARCbook: A New Electronic Book controls, vacuum, power-supply, linac 638
 
  • A. Cianchi
    INFN-Roma II, Roma
  • S. Fioravanti, E. Pace
    INFN/LNF, Frascati (Roma)
  Many electronic books exist for logging the activity of an accelerator, but all of them are basically a translation of a paper book in an electronic format, with some extra features coming from the usage of a database for storing the information. SPARCbook is based on PostgreSQL, an open source database. A new, nice GUI has been developed for manually inserting data (both text and pictures) in the logbook and retrieving the old information, using several filters like date, author, or type of information. This GUI has been developed using HTML, PHP, and JavaScript, and it is quite similar to GUIs of already existing electronic logbooks. The peculiarity of SPARCbook is that it is also possible to insert information in the book from the control system of the accelerator, automatically or after a human decision. The SPARC control system is a distributed system, developed using LabVIEW, based on PCs and real-time CPUs. Information, tables, and graphs can be submitted from each CPU and from the central control system to SPARCbook making a query to PostgreSQL via TCP. That makes the system really powerful because any commercial CPU has TCP capability.  
 
RPPB22 Tracking Accelerator Settings controls, background, diagnostics 653
 
  • W. Fu, D. P. Ottavio, T. D'Ottavio
    BNL, Upton, Long Island, New York
  Recording setting changes within an accelerator facility provides information that can be used to answer questions about when, why, and how changes were made to some accelerator system. This can be very useful during normal operations, but can also aid with security concerns and in detecting unusual software behavior. The Set History System (SHS) is a new client/server system developed at the Collider-Accelerator Department of Brookhaven National Laboratory to provide these capabilities. The SHS has been operational for over two years and currently stores about 100K settings per day into a commercial database management system. The SHS system consists of a server written in Java, client tools written in both Java and C++, and a web interface for querying the database of setting changes. The design of the SHS focuses on performance, portability, and a minimal impact on database resources. In this paper, we present an overview of the system design along with benchmark results showing the performance and reliability of the SHS over the last year.  
 
RPPB32 A MySQL-based Data Archiver: Preliminary Results controls, monitoring, site 680
 
  • C. J. Slominski, M. Bickley
    Jefferson Lab, Newport News, Virginia
  Following an evaluation of the archival requirements of the Jefferson Laboratory accelerator's user community, a prototyping effort was executed to determine if an archiver based on mySql had sufficient functionality to meet those requirements. This approach was chosen because an archiver based on a relational database enables the development effort to focus on data acquisiti and management, letting the database take care of storage, indexing and data consistency. It was clear from the prototype effort that there were no performance impediments to successful implementation of a final system. With our performance concerns addressed, the lab undertook the design and development of an operational system. The system is in its operational testi phase now. This paper discusses the archiver system requirements, some of th design choices and their rationale, and presents the acquisition, storage and retrieval performance levels achieved with the system.