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The Control System of the ELETTRA Booster Injector. Marco Lonza. L. Battistello, D. Bulfone, V. Forchi', F. Giacuzzo, G. Gaio, R. Marizza, R. Passuello, L. Pivetta, C. Scafuri, L. Zambon Sincrotrone Trieste, ELETTRA. Outline. The Booster Project Control System Requirements and Guidelines

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The Control System of the ELETTRA Booster Injector

Marco Lonza

L. Battistello, D. Bulfone, V. Forchi', F. Giacuzzo, G. Gaio, R. Marizza, R. Passuello, L. Pivetta, C. Scafuri, L. Zambon

Sincrotrone Trieste, ELETTRA


The Booster Project

Control System Requirements and Guidelines

Hardware Architecture

Software Infrastructure

Interlock and Personnel Safety Systems


ELETTRA Storage Ring

Booster Synchrotron

Linac Pre-Injector

The Booster Project

  • ELETTRA is the third generation light source based in Trieste, ITALY, since 1992
  • Present injector: 1.2 GeV Linac, energy ramping to 2 - 2.4 GeV
  • New injector: 150 MeV Linac pre-injector + 2.5 GeV Booster synchrotron at 3 Hz
  • Full energy injection at up to 2.5 GeV, rapid refills, top-up injection, reliability, stability
  • The 1.2 GeV Linac will be used for the Free Electron Laser [email protected]
  • Booster construction just started: completion by end 2007
Booster Control System Requirements and Guidelines

The existing control system (early ’90s technology): VME, 68k, OS-9, MIL-1553, Ethernet, Unix, Motif, RPC

After partial upgrades of used technology and systems, a new foundation is necessary


  • the Booster control system will be an extension of the existing ELETTRA machine control system (same network, control room computers and servers)
  • stable and reliable for top-up continuous injection
  • diagnosis and fixing capabilities implemented remotely (technical gallery inaccessible during operations)
  • performance and real-time capabilities (3 Hz operations)


  • deployment of off-the-shelf components, open standards and free open-source software
  • adoption of existing control system software in the frame of a collaboration with other institutes (Tango)

Following the above guidelines, the development time can be noticeably reduced and the overall cost lowered



Control Room Workstations

Linux PC

Ethernet LAN




Equipment Controllers (EC)

VME Crates, Power-PC Boards

with Linux-RTAI




Embedded Controllers



Local Client

Control System Architecture

Upgrade of the existing Unix workstations and servers with Linux PCs accomplished by the beginning of 2006

Existing control room programs (based on Motif and RPC) ported to Linux

The new booster applications will run on the same PCs

Equipment Controllers

Most of the machine equipment will be interfaced to the control system through diskless VME systems called Equipment Controllers (EC)

  • VME crate: 16-slot VME64x backplane, two hot-swap redundant power supplies, local controller with Ethernet for remote monitoring and reset
  • CPU board: Motorola MVME5100 with PowerPC G4 at 400 MHz
  • Software: Linux + Tango control system software
  • Real-time: RTAI real-time extension for deterministic response

(20 ms max latency jitter)

  • I/O: analog and digital signals, RS-232/422/485, GPIB, etc.
  • I/O hardware: Industry Pack (IP) modules mounted on VME carriers

PMC modules and VME boards employed where performance or special features are required

  • Special I/O: ex. V/F conversion in the Linac klystron room to reject electromagnetic interferences. VME board developed in-house
  • Transition Modules: provide signal conditioning and clean cabling of I/O signals



Software: GNU/Linux

GNU/Linux already used at ELETTRA for two years

  • reliable and robust
  • deployed in both Intel PCs and PPC VME systems
  • common source code base for all platforms
  • CVS used for source repository and revision managing

Linux is a good choice

Keep on this way for the booster control system

Tango Meeting at Elettra

Software: CORBA and TANGO

  • CORBA as basic middleware for distributed applications
  • TANGO control system software framework: joined the international collaboration which is developing it (ESRF, Soleil, ELETTRA and Alba) [WE2.3-6O]
    • Tango meets all our requirements in terms of capabilities, technologies and performance
    • mature and well tested: ~30 Tango Devices developed and deployed at ELETTRA
    • the object model helps software development and maintenance: man power reduced
  • active and fruitful collaboration between partners: the developed software is made available to the Tango community
  • ELETTRA developments: an alarm system [WE3B-1-7O], database redundancy, Qt integration, a Web based browser of historical data, a Web interface to Tango control system, etc.





Software: GUI and Qt

  • Qt graphical toolkit (by Trolltech)
  • C++ and Python Tango APIs
  • Developed three packages to ease GUI developments:
    • Ttk(Tango Toolkit): a non graphical library that provides some classes to handle the most common Tango client read and write actions (device proxy, event subscription, polling threads, error logs, etc.)
    • QTango eases writing graphical control applications by associating a Tango device attribute or command with a viewer or a controller
    • QtControls custom Qt based widgets suitable for controls and not yet supported by existing Qt widgets
Software: database, scripts and Web

Database: Tango relies on Mysql for device configuration handling. We will also use it for the Tango archiving system (HDB) and to store machine settings (Save/Restore application )

Scripting languages

  • for machine physics measurements and commissioning of new equipment
  • Matlab and Python will be provided (both supported by Tango)

Web Applications

  • E-Giga: data browserof historical data archived by HDB
  • Canone: generic Web interface to the Tango control system
    • PHP based Web server acts as a buffered client of the Tango control system
    • browsing of the operating Tango devices and display of device attributes
    • composition of custom Web pages with configurable widgets. Pages saved as cookies
Control Room













Interlock and Personnel Safety Systems

  • autonomous systems based on a PLC and distributed I/O connected through Profibus
  • the control system communicate with the PLCs via Ethernet TCP/IP and dedicated Tango devices
  • client applications and operator panels built in the Tango framework (no SCADA)

Interlock System

    • machine protection (vacuum system, magnets, etc.)
    • PLC: Siemens S7 series 300
    • control room panel to manage alarm messages and display I/O points

Personnel Safety System

    • protection of people from radiation hazards
    • protection of beamline users during top-up injections with front-ends open
    • Fail-Safe components: PLC (Siemens S7 315F), Profisafe, I/O peripherals
    • sensors and actuators: standard devices in redundant configuration

Machine Gallery Access Panel

  • construction and commissioning of the booster in parallel to ELETTRA operations
  • completion of the project by the end of 2007
  • control system structure defined, hardware and software components chosen
  • adopted the Tango control system: made the necessary integrations to be deployed at Elettra
  • in-house hardware developments almost completed
  • controls developers can concentrate on the specific equipment application
  • GOAL: control system available from the beginning of the booster commissioning
  • the presented control system infrastructure will also be the basis for the new projects like [email protected] and the upgrade of the existing ELETTRA control system

Thank you for your attention