The 250MeV compact cyclotron delivered by ACCEL (Germany) has been installed at PSI and is now in its commissioning phase. The cyclotron, COMET, will provide beam for the PSI proton therapy project PROSCAN. The Control system for this facility comprises three control systems: the COMET control system as provided by the supplier ACCEL, the Machine Control system (MCS) and the user control system (UCS) for each user area. The MCS is basically a copy of the control system used at the High Intensity Proton Facility at PSI , with some additional components required for a proper operation of the medical facility. In particular we will describe the mechanisms used for the interfacing of the UCS through a Beam Allocator System (BALL). We will also report on the progress in development and installation of the hardware and software as well as some first results of the operation of the facility.

https://epaper.kek.jp/ica05/proceedings/pdf/p1_010.pdf

Proscan control system status report

The Production Configuration Database is running with Oracle Database Server 7.3 on an OpenVMS platform. This system will be migrated to an Oracle Server 9i running on a Linux platform. The Information storage holds data for different subsystems (Device Definition, Device Control Settings, Equipment, Interlock etc.) A new requirement is the configuration of VME-based Device Control. A description of the migration path, the development of new Database Applications and the progress of the project is reported.

/pdf/migration-of-the-configuration-database-for-psi-cyclotron-3yax1ozzn0.pdf

Migration of the configuration database for psi cyclotron accelerators

At the Paul Scherrer Institute, we run a high intensity proton accelerator with a final energy of 590 MeV and with a beam current up to 2 mA. The handling of a beam power of over 1 Megawatt is a big challenge for the beam diagnostics as well as for the control system. Particular problems arise from the high dynamic range of currents between less than 1 and up to 2000 µA. We will present what has been done from the operational and control system point of view to successfully produce a beam of such a high power and mention the problems that had to be solved. Ideas for further improvements of the reliability and smooth operation of the facility will be outlined as well.

/pdf/control-of-a-1-mw-beam-yqwie2am3d.pdf

Control of a 1 mw beam

The I/O Computers (IOC) in our Control System are, since over ten years, VME based. The data acquisition and control equipment was primarily based on bit serial CAMAC, interfaced through VME to CAMAC modules. The interfaces to PLC or other kinds of equipment were always implemented as CAMAC modules. In the future we will use VME modules whenever applicable, and communicate with PLC-s directly over TCP/IP. The same PLC communication will be used to interface the industrial PLC based control system for the new PROSCAN project. Support for centralized write (set value) logging was implemented, too. This is highly useful in debugging distributed applications. Concurrently we are also replacing the existing HP rt743 IOC-s running under HP-RT operating system with the new MVME51xx running under Lynx OS.

/pdf/psi-proton-accelerator-control-system-upgrade-2ry6k4x9kh.pdf

Psi proton accelerator control system upgrade

A DSP-based Industry Pack carrier board was used for the first time in the Control system of the high intensity proton accelerator facility. With this board we were able to meet the high requirements that had to be realized to perform the first beam tests with the UCN (Ultra Cold Neutron) kicker magnet. The carrier board operates in a VME crate independently of the IOC-CPU, controlling the equipment, like a power supply in this case. The on-board digital signal processor (DSP) monitors the power supply and also other operating conditions like the signals from the Run Permit System (MRPS). It will also produce signals to the MRPS when the equipment is ready to operate. This provides an additional level of security and reduces the workload of the IOC-CPU. These first tests proved the validity of this concept and gave confidence for the future applications, many of which are highly safety-critical

First operation of dsp-based controller board

Magnet power supplies in the PSI accelerator complex with their control and field-bus are old. Some components are more than 30 years old. To facilitate further maintenance and to meet the more demanding specifications for operation with the 2mA beam, they have to be replaced. The switched power supplies, developed for SLS, will be used. This implies a major redesign of part of the accelerator control system, which is currently based on CAMAC, ROAD-C and other in house developed hardware including the machine protection system. The modified control for the new set-up will be based on VME and alternatively CAMAC, with dedicated processors for the functionality of the machine protection system.

/pdf/replacement-of-magnet-power-supplies-control-and-field-bus-o42hj7x57w.pdf

Replacement of magnet power supplies, control and field-bus for the psi cyclotron accelerators

The present status of the continuously upgraded control system for the three accelerators is presented. Some of the major improvements in the 20 year history of using the control system are highlighted. The experience of the development and the transition from a group of isolated systems based on minicomputers to a message-based distributed system is presented. The set of tools provided for operation and development of the accelerators is described.

Status report of the PSI accelerator control system, the tools provided for operation of the accelerator

Throughout the life cycle of control systems, we are faced with the question of what fabulous new piece of hardware or software should be used and how to integrate this into a viable system. Accelerators cover a wide range, from simple cyclotrons for isotope production, to cascades of cyclotrons for variable energy and multiple particles, this precludes a standard answer for all cases. The system requirements according to the purpose and nature of the accelerator are analyzed and we try to extract some guidelines for implementation, development and maintenance of the appropriate control systems. We then try to analyze present trends in a selection of fields like operating systems, commercial systems, software sharing, field busses, etc.

Requirements and solutions for accelerator control systems

Operation of the PSI cyclotrons has always relied heavily on manual control. Tuning of our high intensity beams for minimum losses is an art still depending on personal skill. An ergonomically good design of the knobbox is therefore essential for good operation. The age of the previous design, and the request to implement the ACS knobbox in the SLS control system based on EPICS, was an opportunity for a redesign. The new knobbox is an autonomous node in the system. It is based on industrial PC/104 hardware with LINUX as the operating system. CDEV and ACScommunication provide the interface to the respective control systems.

/pdf/integration-of-a-new-knobbox-in-the-psi-control-systems-acs-4ckvvegmml.pdf

Integration of a new knobbox in the psi control systems acs and epics

Magnet power supplies in the PSI accelerator complex with their control and field-bus are old. Some components are more then 30 years old. To guarantee further maintenance and to meet the more demanding specifications for operation with the 2mA beam, they have to be replaced. The switched power supplies, developed for SLS, will be used. This implies a major redesign of part of the accelerator control system, which is now based on CAMAC, ROAD-C and other in house developed hardware including the machine protection system. The modified control for the new set-up will be based on VME and alternatively CAMAC, with dedicated processors for the functionality of the machine protection system.

Replacement of Magnet Power Supplies, Control and Field-Bus for the Psi Cyclotron Accelerators

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