| Paper | Title | Other Keywords | Page |
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| S01SRA10 | HESYRL Control System Status | controls, linac, injection, operation | 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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| S03SRD14 | Control System for HIMAC Synchrotron | controls, power-supply, synchrotron, Ethernet | 156 |
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| A control system for HIMAC synchrotron has been designed. The system consists of a main computer, console workstations, a few small computers and VME-computers connected via Ethernet. The small computers are dedicated to the control of an injection line, an extraction line and an RF system. Power supplies in main rings are controlled by the VME-computers through FDI/FDO, DI/DO modules. This paper describes an overview of the synchrotron control system. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S03SRD14 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S04SRS03 | Status of the Control and Beam Diagnostic Systems of the CRYRING Project | controls, detector, hardware, diagnostics | 167 |
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| CRYRING is a facility for research in atomic, molecular and nuclear physics. It uses a cryogenic electron beam ion source, CRYSIS, together with an RFQ linear accelerator as injector into a synchrotron/storage ring for very highly charged, heavy ions. The first circulating beam was achieved in December 1990. The status of the systems for control and beam diagnostics are described. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S04SRS03 | ||
| 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, operation, 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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| S08NC05 | The Transmission of Accelerator Timing Information around CERN | interface, controls, network, operation | 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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| S08NC06 | Time and Load Measuring in the SPS/LEP Control System | network, controls, software, hardware | 310 |
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| This paper describes the experiences with the SPS/LEP Control System during its first operational days from the communication point of view. The results show difference between hardware possibility of the local communication based on the modem technology and the possibility to use it by PC machines. There is also several figures describing the activity on the communication lines. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S08NC06 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S10TS01 | Realtime Aspects of Pulse-to-Pulse Modulation | controls, real-time, ECR, interface | 345 |
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| The pulse-to-pulse modulation of the SIS-ESR control system is described. Fast response to operator interaction and to changes in process conditions is emphasized as well as the essential part played by the timing system in pulse-to-pulse modulation. The benefits of pulse-to-pulse modulation in acceleration operating have been described as early as ’77 for the CERN’s PS complex. It is an effective way to increase the overall output of valuable beamtime of one or more accelerators. With beamsharing, rarely all users of the beam will be unable to accept the beam at the same time. If the PPM-handling quickly responds to changing conditions, there will be virtually no dead-time in the machine operating due to inevitable dead-times of experiments, e.g. during new experimental setups. In a multi-accelerator facility, PPM is almost imperative. Asynchronously running machines, every one of them operating as an injector for the next one, normally have time left between subsequent injections that can be used for experiments. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S10TS01 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S10TS02 | Injection Timing System for PLS | injection, gun, klystron, kicker | 349 |
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| The ultimate goal of the PLS timing system is to successfully inject a electron bunch to a predesigned bucket in the Storage Ring. In the Linac, a pretrigger of 102.8 microseconds prior to the Gun trigger may be required to charge the pulsed divces properly and it should be precisely delayed to synchronize with beam pass at each accelerating column. To inject the electron bunch, which fully accelerated in the Linac, into a target bucket of SR, the injection kicker magnets must be energized to provide the appropriate magnetic field. For the sequential filling of the SR buckets, the appropriate timing delays throughout the entire timing system are programmable controlled by operator. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S10TS02 | ||
| 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 | controls, gun, linac, operation | 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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| S10TS05 | A New VME Timing Module: TG8 | controls, network, real-time, hardware | 360 |
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| The two accelerator divisions of CERN, namely PS and SL, are defining a new common control system based on PC, VME and Workstations. This has provided an opportunity to review both central timing systems and to come up with common solutions. The result was, amongst others, the design of a unique timing module, called TG8. The TG8 is a multipurpose VME module, which receives messages distributed over a timing network. These messages include timing information, clock plus calendar and telegrams instructing the CERN accelerators on the characteristics of the next beam to be produced. The TG8 compares incoming messages with up to 256 programmed actions. An action consists of two parts, a trigger which matches an incoming message and what to do when the match occurs. The latter part may optionally create an output pulse on one of the eight output channels and/or a bus interrupt, both with programmable delay and telegram conditioning. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S10TS05 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S10TS06 | Modular Pulse Sequencing in a Tokamak System | plasma, experiment, electron, coupling | 364 |
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| Pulse technique applied in the timing and sequencing of the various part of the MUT tokamak system are discussed. The modular architecture of the pulse generating device highlights the versatile application of the simple physical concepts in precise and complicated research experiment. In experimental studies of pulse plasma devices, timing and sequencing of the various events are an important part of the experiment and requires careful considerations. This is achieved in the MUT (University of Malaya Tokamak) tokamak system by employing modular architecture involving various modules of pulse generating devices. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S10TS06 | ||
| 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 | software, hardware, experiment, operation | 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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| S11LLC06 | Beam Position Monitor Multiplexer Controller Upgrade at the LAMPF Proton Storage Ring | controls, diagnostics, software, interface | 393 |
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Funding: Work supported by the U.S. Department of Energy The beam position monitor (8PM) is one of the primary diagnostic tools used for the tuning of the proton storage ring (PSR) at the Clinton P. Anderson Meson Physics Facility (LAMPF). A replacement for the existing, monolithic, wire-wrapped microprocessor-based BPM multiplexer controller has been built. The controller has been redesigned as a modular system retaining the same functionality of the original system built in 1981. Individual printed circuit cards are used for each controller function to insure greater maintainability and ease of keeping a spare parts inventory. Programmable logic device technology has substantially reduced the component count of the new controller. Diagnostic software was written to support the development of the upgraded controller. The new software actually uncovered some flaws in the original CAMAC interface. |
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| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S11LLC06 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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| S18BPA03 | New Controls for the CERN-PS Hadron Injection Process Using Operating Tools and High-Level Accelerator Modelling Programmes | injection, controls, emittance, betatron | 583 |
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| A new control system using man-machine interface tools with workstations as consoles has been successfully put into operation for the injection of hadrons in the CERN Proton Synchrotron (PS). This paper mainly focuses on specialized modelling programmes involving complex treatments for an optimum operation of the injection process. These programmes include the control of the injection timings, the measurement of the beam emittance with an estimation of how well the incoming beam is matched, and the correction of oscillations at injection. The infrastructure and the programming environment underlaying the new control system are described elsewhere 3¿ The outstanding feature of the internal structure of all these modelling programmes is that they carry out three kinds of data interaction: the input, that is the measurements (e.g. beam time positions, profiles and trajectories), the physical parameters (e.g. required times for synchronization, beam emittance, beam space position and angle at injection), and the output, mainly the hardware values (e.g. preset counter settings, currents to apply to injection steering magnets). | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S18BPA03 | ||
| About • | Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992 | ||
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