| Paper | Title | Other Keywords | Page |
|---|---|---|---|
| S01SRA01 | A Users View of the SPS and LEP Control Systems | controls, software, network, MMI | 1 |
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| Every accelerator has a control system; at present the SPS has two, both of which are needed to run the machine. Consequently a user of the SPS I LEP complex has to be concurrently familiar with three control systems. While this situation brings problems it allows, even forces, comparison between the different systems, which in tum enriches the user viewpoint. This paper assesses the SPS and LEP control systems from the point of view of the user, who may be an equipment specialist, operator, accelerator physicist or combinations thereof. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S01SRA01 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S01SRA06 | Recent Developments of the ALPI Control System | controls, power-supply, storage-ring, electron | 23 |
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| This paper presents recent developments of the control system for ALPI, the new superconducting linear accelerator that will begin to operate at L.N.L. next year. Both hardware and software architectures are described and some base choices are discussed. Results of tests performed in the last two years are also reported. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S01SRA06 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S01SRA07 | The GSI Control System | controls, interface, software, status | 27 |
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| The GSI accelerator facility consists of an old linac and two modern machines, a synchrotron and a storage ring. It is operated from one control room. Only three operators at a time have to keep it running with only little assistance from machine specialists in daytime. So the control tools must provide a high degree of abstraction and modeling to relieve the operators from details on the device level. The program structures to achieve this are described in this paper. A coarse overview of the control architecture is given. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S01SRA07 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S01SRA09 | Accelerator Control Systems in China | controls, software, interface, status | 35 |
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| Three accelerator facilities were built in the past few years, the 2.8 GeV electron positron collider BEPC, the heavy ion SSC cyclotron accelerator HIRFL and the 800 MeV synchrotron radiation storage ring HESYRL. Aimed at different research areas, they represent a new generation of accelerator in China. This report describes the design philosophy, the structure, performance as well as future improvements of the control systems of the these facilities. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S01SRA09 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S01SRA10 | HESYRL Control System Status | controls, linac, timing, injection | 40 |
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| HESYRL synchrotron radiation storage ring was completed in 1989 and has been in commissioning since then. Now it has met its design specification and is ready for synchrotron light experiments. Control system of the project was completed in 1989 and some modifications were made during commissioning. This paper describes its present configuration, status and upgrading plan. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S01SRA10 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S02SRU02 | Common Control System for the CERN Accelerators | controls, software, interface, network | 54 |
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| The PS and SPS Accelerator Control Systems are becoming obsolete and need urgent rejuvenation. After a control users forum, where users expressed their needs, two main Working Groups were set up, consisting of Control and Equipment Specialists and experienced Machine Operators. One Working Group studied the architecture and the front-end processing and the other a common approach to the application software needed to run the CERN accelerator complex. The paper presents the technical conclusions of their work and the policy to implement it, taking into account the necessity to operate both machines without interruption of the Physics Program. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S02SRU02 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S02SRU04 | The Next Generation Control System of GANIL | controls, software, real-time, database | 65 |
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| The existing computer control system of GANIL is being renewed to fulfil the increasing requirements of the accelerator operation. This medium term major improvement is aiming at providing the physicists with a wider range of ion beams of higher quality under more flexible and reliable conditions. This paper gives a short description of the new control system envisioned. It consists of a three layer distributed architecture federating a VAX6000-410NMS host computer, a real time control system made up of a dual host VAX3800 and workstation based operator consoles, and at the frontend segment: VME and CAMAC processors running under the VAXELN operating system, and programmable logic controllers for local controls. The basic issues with regard to architecture, human interface, information management, etc. are discussed. Lastly, first implementations and operation results are presented. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S02SRU04 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S02SRU07 | Upgrading the BEPC Control System | controls, software, power-supply, distributed | 82 |
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| The BEPC control system has been put into operation and operated normally since the end of 1987. Three years’s experience shows this system can satisfy basically the operation requirements, also exhibits some disadvantages a raised from the original centralized system architecture based on the VAX-VCC-CAMAC, such as slow response, bottle neck of VCC, less CPU power for control etc. This paper describes the method and procedure for upgrading the BEPC control system which will be based on DECnet and DEC-WS, and thus intend to upgrade the control system architecture from the centralized to the distributed and improve the integral system performance. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S02SRU07 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S02SRU08 | The Rejuvenation of TRISTAN Control System | controls, hardware, real-time, software | 85 |
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| The current TRISTAN accelerator control system uses CAMAC as a front end electronics, and they are controlled by twenty five Hitachi minicomputer HIDIC 80’s which are linked with an N-to-N token ring network. After five years from now, these computers must be replaced. This is because of the life time of control system and we have to cope with the requirements imposed by our future project such as the KEK B-Factory and the main ring photon factory projects. The rejuvenation of this control has to be done under some constraints such as the lack of manpower, limited time and financing. First we review the problems of current control system, then the philosophy of the new generation control system is presented. Finally it is discussed how to move to the new generation control system from the current TRISTAN control system. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S02SRU08 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S02SRU09 | Upgrade Plan for the Control System of the KEK e⁻/e⁺ Linac | controls, network, software, linac | 89 |
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| The KEK 2.5-GeV linac has been operating since 1982. However, in order to maintain reliable operation, the control system should be upgraded within a few years. We plan to replace the minicomputers and the main network connecting them. Thus, the architecture of the control software will also be revised. In the new system we should adopt software and hardware standards. In the next control system we will employ the TCP/IP (DARPA) protocol suite for the main network and Unix workstations to replace the minicomputers. For connections to the local controllers, VME bus (IEEE 1014) will be utilized. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S02SRU09 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S03SRD02 | A Performance Requirements Analysis of the SSC Control System | controls, network, interface, collider | 105 |
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Funding: Operated by the Universities Research Association, Inc., for the U.S. Department of Energy under Contract No. DE-AC02-89ER40486. This paper presents the results of analysis of the performance requirements of the Superconducting Super Collider Control System. We quantify the performance requirements of the system in terms of response time, throughput and reliability. We then examine the effect of distance and traffic patterns on control system performance and examine how these factors influence the implementation of the control network architecture and compare the proposed system against those criteria. Operated by the Universities Research Association, Inc., for the U.S. Department of Energy under Contract No. DE-AC02-89ER40486 |
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| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S03SRD02 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S03SRD03 | The Computer Control System for the CESR B Factory | controls, interface, database, hardware | 110 |
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Funding: Work supported by the US National Science Foundation B factories present unique requirements for controls and instrumentation systems. High reliability is critical to achieving the integrated luminosity goals. The CESR-B upgrade at Cornell University will have a control system based on the architecture of the successful CESR control system, which uses a centralized database/message routing system in a multiported memory, and VAXstations for all high-level control functions. The implementation of this architecture will address the deficiencies in the current implementation while providing the required performance and reliability. |
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| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S03SRD03 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S04SRS01 | Digital Control of the Superconducting Cavities for the LEP Energy Upgrade | cavity, controls, software, klystron | 159 |
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| The superconducting (SC) cavities for the LEP200 energy upgrade will be installed in units of 16 as for the present copper cavity system. Similar equipment will be used for RF power generation and distribution, for the low level RF system and for digital control. The SC cavities and their associated equipment however require different interface hardware and new control software. To simplify routine operation control of the SC cavity units is made to resemble as closely as possible that of the existing units. Specific controls for the SC cavities at the equipment level, the facilities available and the integration of the SC cavity units into the LEP RF control system are described. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S04SRS01 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S04SRS05 | Beam Extraction Controlsystems of the Fast-Cycling Synchrotron | controls, extraction, synchrotron, target | 174 |
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| A compact system controlling the extraction of different beams (gamma, electron, synchrotron radiation) in single and simultaneous operation modes at high electromagnetic disturbances level based on using one computer of IBM PC/AT type is described. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S04SRS05 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S04SRS07 | Multi-Microprocessor Control of the Main Ring Magnet Power Supply of the 12 GeV KEK Proton Synchrotron | controls, power-supply, injection, software | 180 |
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| A general description of the computer control system of the KEK 12 GeV PS main ring magnet power supply is given, including its peripheral devices. The system consists of the main HIDIC-V90/2S CPU and of the input and output controllers HISEC-04M. The main CPU, supervised by UNIX, provides the man-machine interfacing and implements the repetitive control algorithm to correct for any magnet current deviation from reference. Two sub-CPU’s are linked by a LAN and supported by a real time multi-task monitor. The output process controller distributes the control patterns to 16-bit DAC’s, at 1.67 ms clock period in synchronism with the 3-phase ac line systems. The input controller logs the magnet current and voltage, via 16-bit ADC’s at the same clock rate. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S04SRS07 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S04SRS09 | Magnet Power Supply and Beam Line Control for a Secondary Beam Line K6 | controls, power-supply, status, monitoring | 188 |
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| K6 is a secondary separated-beam line with momentum range up to 2.0 GeV/c in the north experimental hall at the KEK 12 GeV Proton Synchrotron (KEK-PS). On the construction, newly developed magnet power supplies (MPSs), in each of them a microprocessor is embedded, are introduced. The features of the MPS are as follows: 1) The MPS is connected to an upper-level beam line controller (BLC) by GPIB highway for exchanging simple messages. 2) All the operations of the MPS are supervised by the microprocessor, which has its individual parameters and fault messages. It reduces the load of the upper-level controller. 3) The MPS has functions to inspect itself and to report the results. It saves much time and labor of maintenance. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S04SRS09 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S04SRS10 | Specific Beam Delivery System of Medical Accelerator HIMAC | radiation, controls, target, neutron | 192 |
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| A specific beam delivery system for radiation therapy in HIMAC is being designed. This report describes an outline of the beam delivery control system and its operation. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S04SRS10 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S05SRN01 | A Control System for a Free Electron Laser Experiment | controls, experiment, data-acquisition, software | 195 |
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| The general layout of a control and data acquisition system for a Free Electron Laser experiment will be discussed. Some general considerations about the requirements and the architecture of the whole system will be developed. The aim or the ELFA (Electron Laser Facility) experiment is to study the physics of a single pass FEL amplifier operating in the high gain Compton regime using a short electron pulse beam. The experimental purpose is the production of high peak power (0.3-1 GW) of microwave radiation, with a basic wavelength of λr=3 mm, and the possibility of tuning from λr= 1 cm to λr=0.1 mm. In order to achieve this goal an electron beam of very high current (400 A) in short pulses (6 cm) and with a maximum energy around 10 MeV will be injected into the wiggler midplane. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S05SRN01 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S05SRN03 | Control Software for the ESO VLT | controls, software, distributed, database | 202 |
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| The Very Large Telescope (VLT) project of ESO consists of an array of four optical telescopes of 8 m diameter, to be installed at a new site in the Atacama desert in Chile starting in 1995. The control software is completely distributed, being based on LANs interconnecting microprocessors and workstations, where several users and operators will be active at the same time. Microprocessors are used in a variety of control functions, including the active control of the shape of the main mirror and compensation for atmospheric turbulence. Dedicated links and antennas are planned for direct communication and remote observation from various European centers. The main concepts and novelties of the software design are explained. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S05SRN03 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S05SRN06 | Present Status of the JT-60 Control System | controls, plasma, timing, interface | 218 |
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| The present status of the control system for a large fusion device of the JT-60 upgrade tokamak is reported including its original design concept, the progress of the system in the past five-year operation and modification for the upgrade. The control system has the features of hierarchical structure, computer control, adoption of CAMAC interfaces and protective interlock by both software and hard-wired systems. Plant monitoring and control are performed by an efficient data communication via CAMAC highways. Sequential discharge control of is executed by a combination of computers and a timing system. A plasma feedback control system with fast 32-bit microprocessors and a man/machine interface with modern workstations have been newly developed for the operation of the JT-60 upgrade. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S05SRN06 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S05SRN07 | Conceptual Design of Centralized Control System for LHD | controls, plasma, experiment, status | 224 |
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| A centralized control system for a fusion experimental machine is discussed. A configuration whereby a number of complete and uniform local systems are controlled by a central computer, a timer and an interlock system is appropriate for the control system of the Large Helical Device (LHD). A connection among local systems can be made by Ethernet, because a faster transmission of control data is processed by a specific system. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S05SRN07 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S05SRN08 | Status of LHD Control System Design | controls, plasma, experiment, feedback | 228 |
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| The present status of LHD (Large Helical Device) control system design is described, emphasizing on the plasma operation modes, the architecture of the LHD control system, the real-time plasma feedback system with PID or Fuzzy controllers and the construction schedule of the LHD control system. The conceptual and detailed designs are under way taking flexible and reliable operations for physics experiments into account. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S05SRN08 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S06SA03 | The LEP Alarm System | controls, database, software, interface | 254 |
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| Unlike alarm systems for previous accelerators, the LEP alarm system caters not only for the operation of the accelerator but also for technical services and provides the direct channel for personnel safety. It was commissioned during 1989 and has seen a continued development up to the present day. The system, comprising over 50 computers including 5 different platforms and 4 different operating systems, is described. The hierarchical structure of the software is outlined from the interface to the equipment groups, through the front end computers to the central server, and finally to the operator consoles. Reasons are given for choosing a conventional, as opposed to a ’knowledge based’ approach. Finally, references are made to a prototype real time expert system for surveying the power converters of LEP, which was conducted during 1990 as part of the alarm development program. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S06SA03 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S06SA04 | The Software for the CERN LEP Beam Orbit Measurement System | pick-up, software, network, hardware | 260 |
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| The Beam Orbit Measurement (BOM) system of LEP consists of 504 pickups, distributed all around the accelerator, that are capable of measuring the positions of the two beams. Their activity has to be synchronised, and the data produced by them have to be collected together, for example to form a "closed orbit measurement" or a "trajectory measurement". On the user side, several clients can access simultaneously the results from this instrument. Au automatic acquisition mode, and an "on request" one, can run in parallel. This results in a very flexible and powerful system. The functionality of the BOM system is fully described, as well as the structure of the software processes which constitute the system, and their interconnections. Problems solved during the implementation are emphasized. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S06SA04 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S07IC01 | Interfacing Industrial Process Control Systems to LEP/LHC | controls, cryogenics, interface, software | 269 |
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| Modern industrial process control systems have developed to meet the needs of industry to increase the production while decreasing the costs. Although particle accelerators designers have pioneered in control systems during the seventies, it has now become possible to them to profit of industrial solutions in substitution of, or in complement with the more traditional home made ones. Adapting and integrating such industrial systems to the accelerator control area will certainly benefit to the field in terms of finance, human resources and technical facilities offered off-the-shelf by the widely experienced industrial controls community; however this cannot be done without slightly affecting the overall accelerator control architecture. The paper briefly describes the industrial controls arena and takes example on an industrial process control system recently installed at CERN to discuss in detail the related choices and issues. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S07IC01 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S08NC05 | The Transmission of Accelerator Timing Information around CERN | timing, interface, controls, network | 306 |
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| Prior to the construction of the Large Electron Positron (LEP) collider, machine timing information was transmitted around CERN’s accelerators using a labyrinth of dedicated copper wires. However, at an early stage in the design of the LEP control system, it was decided to use an integrated communication system based on Time Division Multiplex (TDM) techniques. Therefore it was considered appropriate to use this facility to transmit timing information over long distances. This note describes the overall system, with emphasis placed on the connectivity requirements for the CCITTG.703 series of recommendations. In addition the methods used for error detection and correction, and also for redundancy, are described. The cost implications of using such a TDM based system are also analyzed. Finally the performance and reliability obtained by using this approach are discussed. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S08NC05 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S10TS04 | The Development of RF Reference Lines and a Timing System for Japan Linear Collider | timing, controls, gun, linac | 356 |
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| The main linac of Japan Linear Collider(JLC) will be operated at an X-band frequency of 11.424 GHz. The positioning of the X-band accelerating structures at JLG requires precise phase synchronisation over about 10 km. Temperature compensated fiber optic cables will be used for the transmission of the 11.424 GHz RF signal. The performance of this transmission line is described. Many timing signals will be also transmitted from the main control room, in which the master RF frequency generator will be situated, via this l.3 ¿m single mode fiber optic link. The outline of the timing system for JLC is given in this paper. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S10TS04 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S10TS07 | The Timing System of the RFX Nuclear Fusion Experiment | timing, software, hardware, experiment | 367 |
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| The RFX Nuclear Fusion Experiment in Padova, Italy, employs a distributed system to produce precision trigger signals for the fast control of the experiment and for the experiment-wide synchronization of data acquisition channels. The hardware of the system is based on a set of CAMAC modules. The modules have been integrated into a hardware/software system which provides the following features: # generation of pre-programmed timing events, # distribution of asynchronous (not pre-programmed) timing events, # gating of timing event generation by Machine Protection System, # automatic stop of timing sequence in case of highway damage, # dual-speed timebase for transient recorders, # system-wide precision of ¿3 ¿s, time resolution ¿ l0 ¿s. The operation of the timing system is fully integrated into the RFX data acquisition system software. The Timing System Software consists of three layers: the lowest one corresponds directly to the CAMAC modules, the intermediate one provides pseudo-devices which essentially correspond to specific features of the modules (e.g. a dual frequency clock source for transient recorders), the highest level provides system set-up support. The system is fully operational and was first used during the commissioning of the RFX Power Supplies in spring ’91. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S10TS07 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S11LLC03 | High Accuracy ADC and DAC Systems for Accelerator Control Applications | controls, power-supply, storage-ring, electron | 382 |
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| In the work presented here the ways of construction, the apparatus for the precision measurements and control systems incorporated in the accelerating facilities of INP are considered. All the apparatus are developed and manufactured in the standard of CAMAC. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S11LLC03 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S11LLC04 | Driving Serial CAMAC Systems from VME Crates | controls, status, software, hardware | 386 |
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| Large control systems in the 80’s were often based on Serial CAMAC loops driven by 16 bit minicomputers. These 16 bit computers, becoming obsolete in the 90’s, are advantageously replaced by VME crates. To maintain the investment in Serial CAMAC hardware and software, an inexpensive Serial Highway Driver has been developed which operates in a VME crate as simple I/O module. With this system, both classical configurations, i.e. the Highway Driver on the I/O bus of the minicomputer and the Highway Driver in a so-called CAMAC mother crate, can be replaced with minimal costs and improved performance. This paper presents a VME Serial CAMAC Driver and compares the performance of the VME driven Serial Highway to the ones driven by minicomputers. The comparison is based on the experience gained with the beginning of the replacement of Norsk Data minicomputers by VME crates in the CERN/PS control system as described by A. Gagnaire et al. in "Replacing PS Controls front end minicomputers by VME based 32-bit processors" in S11LLC01, this conference. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S11LLC04 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S11LLC09 | A CAMAC-Resident Microprocessor for the Monitoring of Polarimeter Spin States | controls, cyclotron, experiment, data-acquisition | 403 |
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| A CAMAC module for the reporting of polarimeter spin states is being developed using a resident microcontroller. The module will allow experimenters at the Indiana University Cyclotron Facility to monitor spin states and correlate spin information with other experimental data. The use of a microprocessor allows for adaptation of the module as new requirements ensue without change to the printed circuit board layout. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S11LLC09 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S11LLC10 | High Accuracy Measurement of Magnetic Field in Pulse Magnetic Elements | polarization, controls, power-supply, coupling | 406 |
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| A CAMAC module intended for measurements of instant magnetic field using coil sensor is described. It is four channel integrating ADC with current input in which signal integration time is controlled externally and may be optimized for a given signal. Original technical solution allowing to eliminate influence of the integrator capacity and switches instability on overall accuracy is described. The large accelerator facilities include a great number of magnetic elements interacting with a beam for a short period ranging from 0.01 ms to 10 ms. For example, this class of elements includes all the magnetic components of channels for particle transportation. In addition, most of these elements are operating rarely - once in 1 - 10000 s. For these elements the most optimal is the use of a pulse power supply that reduces the electric power consumption and which is most important, it solves the problem of heat removal. Though, the pulse power supply poses some problems in providing the accuracy of magnetic field and its measurements. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S11LLC10 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S12FC03 | Smart Machine Protection System | controls, interface, Ethernet, software | 420 |
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Funding: Work supported by Department of Energy contract DE-AC03-76SF00515. A Machine Protection System implemented on the SLC automatically controls the beam repetition rates in the accelerator so that radiation or temperature faults slow the repetition rate to bring the fault within tolerance without shutting down the machine. This process allows the accelerator to aid in the fault diagnostic process, and the protection system automatically restores the beams back to normal rates when the fault is diagnosed and corrected. The user interface includes facilities to monitor the performance of the system, and track rate limits, faults, and recoveries. There is an edit facility to define the devices to be included in the protection system, along with their set points, limits, and trip points. This set point and limit data is downloaded into the CAMAC modules, and the configuration data is compiled into a logical decision tree for the 68030 processor. |
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| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S12FC03 | ||
| About • | Received ※ 02 December 1991 — Accepted ※ 02 January 1992 — Issued ※ 04 December 1992 | ||
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| S12FC08 | Development of a VME Multi-Processor System for Plasma Control at the JT-60 Upgrade | controls, plasma, power-supply, feedback | 438 |
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| Design and initial operation results are reported of a VME multi-processor system for plasma control at a large fusion device named "the JT-60 Upgrade" utilizing three 32-bit MC88100 based RISC computers and VME components. Development of the system was stimulated by faster and more accurate computation requirements for the plasma position and current control. The RISC computers operate at 25 MHz along with two cache memories named MC88200. We newly developed VME bus modules of up/down counter, analog-to-digital converter and clock pulse generator for measuring magnetic field and coil current and for synchronizing the processing in the three RISCs and direct digital controllers (DDCs) of magnet power supplies. We also evaluated that the speed of the data transfer between the VME bus system and the DDCs through CAMAC highways satisfies the above requirements. In the initial operation of the JT-60 upgrade, it has been proved that the VME multi-processor system well controls the plasma position and current with a sampling period of 250 ¿sec and a delay of 500 ¿sec. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S12FC08 | ||
| About • | Received ※ 02 December 1991 — Accepted ※ 02 January 1992 — Issued ※ 04 December 1992 | ||
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| S13MMI05 | Exploiting the X-Window Environment to Expand the Number, Reach, and Usefulness of Fermilab Accelerator Control Consoles | controls, software, network, Windows | 464 |
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The Fermilab accelerator operator workstation of choice is now the Digital VAXstation running VMS and X-Window software. This new platform provides an easy to learn programming environment while support routines are expanding in number and power. The X-Window environment is exploited to provide remote consoles to users across long haul networks and to support multiple consoles on a single workstation. The integration of imaging systems, local datalogging, commercial and Physics community’s software, and development facilities on the operator workstation adds functionality to the system. The locally engineered knob/pointer/keyboard interface solves the multiple keyboard and mouse problems of a multi-screen console. This paper will address these issues of Fermilab’s accelerator operator workstations.
Operated by Universities Research Association for the Department of Energy |
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| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S13MMI05 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S13MMI10 | A New Workstation Based Man/Machine Interface System for the JT-60 Upgrade | interface, controls, man-machine-interface, network | 483 |
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| Development of a new man/machine interface system was stimulated by the requirements of making the JT-60 operator interface more "friendly" on the basis of the past five-year operational experience. Eleven Sun/3 workstations and their supervisory mini-computer HIDIC V90/45 are connected through the standard network; Ethernet. The network is also connected to the existing "ZENKEI" mini-computer system through the shared memory on the HIDIC V90/45 minicomputer. Improved software, such as automatic setting of the discharge conditions, consistency check among the related parameters and easy operation for discharge result data display, offered the "user-friendly" environments. This new man/machine interface system leads to the efficient operation of the JT-60. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S13MMI10 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S13MMI12 | Human-Machine Interface Software Package | controls, software, MMI, linac | 490 |
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| The Man-Machine Interface software Package (MMISP) is designed to configure the console software of PLS 60 Mev LINAC control system. The control system of PLS 60 Mev LINAC ia a distributed control system which includes the main computer (Intel 310) four local station, and two sets of industrial level console computer. The MMISP provides the operator with the display page editor, various I/0 configuration such as digital signals In/Out, analog signal In/Out, waveform TV graphic display, and interactive with operator through graphic picture display, voice explanation, and touch panel. This paper describes its function and application. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S13MMI12 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S16MS03 | The LEP Model Interface for MAD | controls, interface, closed-orbit, network | 546 |
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| During machine studies and trouble-shooting in the LEP machine various optical parameters must be computed, which can be found quickly using the MAD program. However, the LEP operators are not all well acquainted with MAD. In order to ease their task, a simple interface called the LEP model has been written to run on the Apollo workstations of the LEP control system. It prepares jobs for MAD, sends them to a DN 10000 node for execution, and optionally plots the results. The desired machine positions and optical parameters vary between LEP runs. The LEP model contains a powerful selection algorithm which permits easy reference to any combination of positions and optical parameters in the machine. Elements can be chosen by name, by sequence number, or by element class. The choice of optical functions includes closed orbit, Twiss parameters, betatron phases, chromatic functions, element excitations, and many more. Recently matching features have been added. Communication with the control system and with MAD uses self-describing tables, i.e. tables whose columns are labelled with their name and a format code. Experience with this LEP model interface is reported. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S16MS03 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S16MS04 | Optimization of Accelerator Control | controls, distributed, experiment, injection | 550 |
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| Expensive exploitation of charged particle accelerators is inevitably concerned with requirements of effectively obtaining of the best characteristics of accelerated beams for physical experiments. One of these characteristics is intensity. Increase of intensity is hindered by a number of effects, concerned with the influence of the volume charge field on a particle motion dynamics in accelerator’s chamber. However, ultimate intensity, determined by a volume charge, is almost not achieved for the most of the operating accelerators. This fact is caused by losses of particles during injection, at the initial stage of acceleration and during extraction. These losses are caused by deviations the optimal from real characteristics of the accelerating and magnetic system. This is due to a number of circumstances, including technological tolerances on structural elements of systems, influence of measuring and auxiliary equipment and beam consumers’ installations, placed in the closed proximity to magnets, and instability in operation of technological systems of accelerator. Control task consists in compensation of deviations of characteristics of magnetic and electric fields by optimal selection of control actions. As for technical means, automation of modem accelerators allows to solve optimal control problems in real time. Therefore, the report is devoted to optimal control methods and experimental results. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S16MS04 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S17AIA02 | Diagnostic Expert System in the RF Linac | linac, network, diagnostics, controls | 562 |
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| A prototype diagnostic expert system (ES) was developed for the Photon Factory 2.5-GeV electron/ positron LINAC injector system. The ES has been on-lined with the conventional linac computer network for receiving real data. This project was undertaken in an attempt to reduce the linac operator’s mental workload, diagnosis duties, and to explore Artificial Intelligence (AI) technologies. The outlook for ES and its problems, and what has been achieved are outlined in this presentation. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S17AIA02 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S17AIA03 | GLAD: A Generic Lattice Debugger | controls, MMI, quadrupole, software | 566 |
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Funding: Work supported by Department of Energy contract DE-AC03-76SF00515. Today, numerous simulation and analysis codes exist for the design, commission, and operation of accelerator beam lines. There is a need to develop a common user interface and database link to run these codes interactively. This paper will describe a proposed system, GLAD (Generic LAttice Debugger), to fulfill this need. Specifically, GLAD can be used to find errors in beam lines during commissioning, control beam parameters during operation, and design beam line optics and error correction systems for the next generation of linear accelerators and storage rings. |
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| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S17AIA03 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S17AIA04 | Development of Operator Thinking Model and its Application to Nuclear Reactor Plant Operation System | experiment, controls, network, monitoring | 570 |
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| At first, this paper presents the developing method of an operator thinking model and the outline of the developed model In next, it describes the nuclear reactor plant operation system which has been developed based on this model. Finally, it has been confirmed that the method described in this paper is very effective in order to construct expert systems which replace the reactor operator’s role with AI (artificial intelligence) systems. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S17AIA04 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S19SP01 | Control Protocol: The Proposed New CERN Standard Access Procedure to Accelerator Equipment. Status Report | controls, software, instrumentation, vacuum | 591 |
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| Control protocol provides a normalized access procedure for equipment of the same kind from a control system. Modelisation and the subsequent identification of functionalities with their parameters, variables and attributes have now been carried out at CERN for representative families of devices. ISO specifications, such as the ASN.1 metalanguage for data structure representation and MMS definitions and services have, to some extent, been introduced in the design for generality and compatibility with external world. The final product of this design is totally independent of the control systems and permits object oriented implementations in any controls frame. The present paper describes the different phases of the project with a short overview of the various implementations under development at CERN. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S19SP01 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S21CS01 | Issues in Accelerator Controls | controls, software, network, hardware | 602 |
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| When attempting to make conference summaries, one is always tempted - and possibly even expected - to "discern" and then to point out the "great lines" of evolution of the subject and then to make predictions, "far sighted" if possible. Of course such an activity is jolly risky since at the beginning of any such trend, a few discernible examples and implementations of one sort, or a new product here and there, do not necessarily make a trend by the time the developments have really taken on, however, the "great line of evolution" has become obvious to just about everyone and chances are that the trend is already approaching its end and that some other trend - at that point with hardly decodable patterns - is already infiltrating the old situation which - since it is by now known - has become comfortable and homely and - thank God - at long last more or less efficiently usable. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S21CS01 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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