| Paper |
Title |
Page |
| TUPP001 |
Alternating Gradient Operation of Accelerating Modules at FLASH
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1523 |
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- V. Ayvazyan, G. Petrosyan, K. Rehlich, S. Simrock, E. Vogel
DESY, Hamburg
- H. T. Edwards
Fermilab, Batavia, Illinois
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The free electron laser in Hamburg (FLASH) is a user facility providing high brilliant laser light for experiments. It is also an unique facility for testing the superconducting accelerator technology for the European XFEL and the international linear collider (ILC). The XFEL offers several beam lines to users. Within limits given by the beam delivery system the bunch pattern and beam energy should be adjustable independent for each beam line suggesting a time sliced operation. The ILC is focused on the highest gradients possible. FLASH accelerates beam at 5 Hz repetition rate. During accelerator studies the operation of the last accelerating modules with 10 Hz and alternating rf pulses has been established proving the feasibility of a time sliced operation at the XFEL. The rf pulses synchronous to the 5 Hz rf pulses are used for FEL operation whereas the gradient of the remaining rf pulse can be chosen independently and is used for long term high gradient operation gaining experience for the ILC. The operation of two different gradients within a single rf pulse is also available. The paper describes the technical setup, the rf control performance and the operational experience.
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| TUPP002 |
Uniform Motion Control Solution for Variety of Motion Applications
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1526 |
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- J. Dedic, G. Jansa, M. Plesko, R. Sabjan
Cosylab, Ljubljana
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Control solutions for motion applications require high degree of flexibility regarding the use and connectivity. Being fairly simple or highly complex, micro- or millimeter precision, one or multiple axis… the system designer has to tackle specific interfacing issues. One platform should fit different applications and provide cost effective solutions. Flexible software platform is required on one side to satisfy control system (CS) application requirements. On the other side variety of hardware (HW)–controlled by motion controller, i.e., power stages, position feedback–also requires some degree of connection flexibility. Paper presents a design of a motion control platform that offers flexible interfacing both to CS and HW, elegant extendibility options for selection of feedback protocols, low-level direct access for engineering control and enables large distances between controller and motors.
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| TUPP003 |
Automatic Generation of SEU Immunity for FPGA Based Electronics for Accelerators
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1529 |
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- M. K. Grecki, G. W. Jablonski, W. Jalmuzna, D. R. Makowski
TUL-DMCS, Łódź
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The modern accelerator control systems nowadays are build using digital technology based on FPGA circuits. However, digital circuits working in radioactive environment are exposed to disturbing effects, in particular SEU (Single Event Upset)*. One of the countermeasure is a redundancy in circuit that allow to detect and correct errors caused by radiation**. Unfortunately CAD software provides no support to automatically include required redundancy in the FPGA project. Moreover, optimization procedure removes all redundant parts and special effort must be made to prevent that. The paper presents a software environment to process VHDL description of the circuit and automatically generate the redundant blocks together with voting circuits. The generated redundancy uses Triple Module Redundancy (TMR) scheme. It also supports the VHDL simulation with SEUs in order to enable identification of the most sensitive components***. Since the TMR is costly, the designer can indicate which parts of the circuit should be replicated based on the results of simulation.
*Baumann. Neutron-induced…, Int. Rel. Phys. Symp. 2000.
**Hentschke et al. Analyzing Area…, Symp. ICs and Systems Design, SBCCI02.
***Grecki. VHDL Simulation…, Nanotech 2006, Vol.1.
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| TUPP004 |
Evolution and Status of the Electronic Logbooks at the ESRF
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1532 |
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- L. Hardy, J. M. Chaize, O. Goudard
ESRF, Grenoble
- S. D. Cross, D. Fraser, N. V. Hurley
St James Software, Cape Town
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In 2004 the ESRF moved to electronic logbooks. Such logbooks should be configurable enough to be used in several situations: document management, exchange of technical information and, in the Control Room, as a powerful tool for storing and retrieving information at a glance. The St James software company developed such a product which met our constraints and which is easy to configure. Moreover, this product can be tailored and evolved with time by its users and allows automatic access to control system parameters. After gaining experience with several logbooks using the old version 4 system, a new more user-friendly version which offers extensive customisation possibilities has been launched. This new version, J5, has already been interfaced to the ESRF control system (Tango) through a Python binding. This allows automatic triggering of records on specific events and the generation of automatic reports from the history database system. J5 can use an LDAP server for security management.
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| TUPP005 |
Application Programs for the Elettra Booster Commissioning and Operation
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1535 |
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- F. Iazzourene, V. Forchi', C. Scafuri
ELETTRA, Basovizza, Trieste
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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.
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| TUPP006 |
Beam Test with a New Control System of Acceleration in HIMAC
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1538 |
| |
- M. Kanazawa
NIRS, Chiba-shi
- K. Maeda
Toshiba Corporation, Tokyo
- K. Watanabe
Chiba University, Graduate School of Science and Technology, Chiba
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In the present acceleration system in HIMAC, acceleration frequency of a direct digital synthesizer is controlled with B-clock pulses of B+ and B- signals that correspond to 0.2 Gauss increment and decrement of dipole magnetic field. In the tested new control system, we will use only clock pulse whose clock rate is locked to the power line frequency. With this simple system, it is easy to build up the acceleration control system for multiple flat-top pattern. This pattern operation is expexted to use in the next irradiation system of spot-scanning in HIMAC. In this presentation, the used system and its beam tests will be presented.
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| TUPP008 |
An Automatic Control System for Conditioning 30 GHz Accelerating Structures
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1541 |
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- A. Dubrovsky, J. A. Rodriguez
CERN, Geneva
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A software application programme has been developed to allow fast, automatic, conditioning of the accelerating structures to be high-gradient tested at 30 GHz in CTF3. The specificity of the application is the ability to control a high power electron beam which produces the 30 GHz RF power used to condition the accelerating structures. It significantly increases the amount of time useable for high power conditioning. In this paper this fast control system, the machine control system, the logging system, the graphic user control interface and the logging data visualization are described. An outline of the conditioning control system itself and of the feedback controlling peak power and pulse length is given. The software allows different types of conditioning strategies to be programmed.
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| TUPP009 |
Implementation and Operation of the Elettra Booster Control System
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1544 |
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- 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
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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.
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| TUPP011 |
The ESRF Temperature Monitoring System from an Operational Point of View
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1547 |
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- D. Schmied, E. Burtin, J. M. Chaize, R. Kersevan, I. Parat, M. Peru, J. L. Pons
ESRF, Grenoble
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The vacuum control system of the ESRF electron Storage Ring (SR) is in operation since more than ten years now. Apart from difficulties to have appropriate support for the old system, we start facing problems of aging and obsolescence. We have been reviewing our philosophy of data acquisition and remote control in order to upgrade our systems with state of the art technology by taking into account our operational experience. We have installed shielded "intelligent" devices inside the SR and took advantage of the latest developments linked to new communication technologies and standards, such as TCP/IP MODbus protocol and WEB server based instrument control. This presentation outlines our present work dedicated to the ESRF temperature acquisition system based on Programmable Logic Controllers (PLC), and new developments regarding the user interface in the control room. Several examples show the importance of surveying the temperatures in order to identify various mechanical or operational problems which allow us to anticipate later failures and provide us with an additional machine diagnostic tool.
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| TUPP012 |
Presentation of the New ESRF Vacuum Control Applications from an Operational Point of View
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1550 |
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- D. Schmied, E. Burtin, J. M. Chaize, R. Kersevan, I. Parat, P. V. Verdier
ESRF, Grenoble
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The ESRF is in operation since more than ten years. Due to the aging vacuum system, we are faced to different kinds of failures such as air or water leaks, overheating of RF-liners or poor chamber alignment. In order to anticipate these failures and therefore reduce down times, we started to develop new diagnostic tools which allow us to detect much faster and with more precision any possible failures or malfunctioning of our vacuum system. Also driven by the increase of machine performances and the continuous vacuum installations, we search for new tools to safely commission such upgrades. This paper outlines our work on the development of a new vacuum user interface, which not simply reflects the actual status of our vacuum system, but which also provides us with a dynamic survey of computed vacuum signals highlighting unusual vacuum behaviours.
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| TUPP013 |
Synchronized Data Distribution and Acquisition System Using Reflective Memory for J-PARC 3GeV RCS
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1553 |
| |
- H. Takahashi, N. Hayashi
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
- M. Sugimoto
Mitsubishi Electric Control Software Corp, Kobe
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J-PARC 3GeV RCS inject the different parameter beam to each facilities, which are MLF and MR. Therefore, 3GeV RCS Control System must realize the monitoring and the operation that are distinguished "MLF beam" from "MR beam". And, we have developed the data distribution and acquisition system for "synchronized data" which required the distinguished monitoring and operation. We have designed and developed distribution and acquisition system using Reflective Memory (RM) for BPM data, which is one of synchronized data. There are 54 BPM, and BPM signal is processed by each BPM signal circuit (total 54 circuits). Then, we have designed that RM have 54 virtual ring memories and for a few seconds BPM data pre one virtual ring memory is buffered. And we decide BPM data is written virtual ring memory position based on "beam tag", which distributed from RM of J-PARC Timing System. This "beam tag" is synchronized across J-PARC. Thereby, 54 BPM data that written same virtual ring memory position become BPM data for identical beam. The paper presents the current status of the synchronized data distribution and acquisition system using RM.
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| TUPP014 |
Control System for a 150 MeV FFAG Complex in KURRI
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1556 |
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- 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
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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.
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| TUPP015 |
Investigations into Cost Reductions of X-band Instrumentation
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1559 |
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- D. Van Winkle, V. A. Dolgashev, J. D. Fox, S. G. Tantawi
SLAC, Menlo Park, California
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The prohibitive costs of commercial test equipment for making fast and accurate pulsed phase and amplitude measurements at X-band result in decreased productivity due to shortages of shared equipment across the test laboratory. In addition, most current set-ups rely on the use of pulsed power heads which do not allow for the measurement of phase thereby limiting the flexibility of available measurements. In this paper, we investigate less expensive in-house designed instrumentation based upon commercial satellite down converters and widely available logarithmic detector amplifiers and phase detectors. The techniques are used to measure X-band pulses with widths of 50 ns to 10’s of usec. We expect a dynamic range of 30-40 dB with accuracies of less than ± 0.1 dB. We show results of the built and tested systems with particular attention focused on temperature performance and accuracy. Block diagrams of the down conversion scheme, and the architecture of a multi-signal X-band RF monitor and measurement system is illustrated. Measured results, and possible modifications and upgrades are presented.
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| TUPP016 |
A Flight Simulator for ATF2 - A Mechanism for International Collaboration in the Writing and Deployment of Online Beam Dynamics Algorithms
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1562 |
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- G. R. White, S. Molloy, A. Seryi
SLAC, Menlo Park, California
- P. Bambade, Y. Renier
LAL, Orsay
- S. Kuroda
KEK, Ibaraki
- D. Schulte, R. Tomas
CERN, Geneva
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The goals of ATF2 are to test a novel compact final focus optics design with local chromaticity correction intended for use in future linear colliders. The newly designed extraction line and final focus system will be used to produce a 37nm vertical waist from an extracted beam from the ATF ring of ~30nm vertical normalised emittance, and to stabilise it at the IP-waist to the ~2nm level. Static and dynamic tolerances on all accelerator components are very tight; the achievement of the ATF2 goals is reliant on the application of multiple high-level beam dynamics algorithms to align and tune the electron beam in the extraction line and final focus system. Much algorithmic development work has been done in Japan and by colleagues in collaborating nations in North America and Europe. We describe here development work towards realising a 'flight simulator' environment for the shared development and implementation of beam dynamics code. This software exists as a 'middle-layer' between the lower-level control systems (EPICS and V-SYSTEM) and the multiple higher-level beam dynamics modeling tools in use by the three regions (SAD, Lucretia and PLACET).
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| TUPP017 |
Orbit and Dispersion Tool at FLASH
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1565 |
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- E. Prat, V. Balandin, N. Golubeva
DESY, Hamburg
- J. K. Kamenik, I. Kriznar, T. Kusterle
Cosylab, Ljubljana
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Based on a former MATLAB tool, a java-based application to measure and correct orbit and dispersion has been developed at FLASH. In this paper we discuss the algorithm used in this tool as well as its functionality. First tests on machine operation are also presented.
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| WEZG01 |
Protection Controls for High Power Accelerators
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1921 |
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- J. Wenninger
CERN, Geneva
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The next generation hadron accelerators will operate with MW beams or store beams with an energy of many 100 MJ. Machine protection will constrain operation, but some operational flexibility is still required for commissioning and performance optimization. This is a substantial challenge for control systems and application programs. New tools are developed to face those challenges: critical settings management, software interlocks, role based access to equipment, automatic accelerator mode recognition etc. This talk presents some of the challenges and tools. Experience with novel approaches are discussed.
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Slides
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| WEZG02 |
Commissioning of an Accelerator: Tools and Management
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1926 |
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- A. Nadji
SOLEIL, Gif-sur-Yvette
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During the life of an accelerator project, the commissioning is a very important and exciting phase. It is preceded by a long period of design, calculations, magnetic measurements, installation, and alignment. We want the commissioning stage to be successful and fast; that is, attaining rapidly the set goals and make the machine available for impatient users. This paper summarizes the experience of several commissioning phases for different types of accelerators such as SNS, JPARC, and LHC, as well as synchrotron light sources such as DIAMOND, SOLEIL, and SSRF. The importance of preparation for commissioning on both technical and personnel levels will be covered. We will also talk about the concept of stages, anticipation of problems, and the early involvement of many specialists in addition to accelerator physicists and future accelerator operators. Furthermore, we will outline the importance of having a command control that is practical, fast, and has the capacity to offer high level automated applications. Finally, we will discuss the indispensable role of diagnostics for the first injection and first turns of the beam.
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Slides
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