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< kazuro.furukawa @ >. Redundant IOC Introduction. Kazuro Furukawa < kazuro . furukawa @ kek . jp > For KEKB and Linac Control Groups Jul.2009. KEK : Accelerator Facilities for Particle & Nuclear Physics, Material Structure Science. Mt. Tsukuba. J-PARC (at Tokai Site).

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redundant ioc introduction

< kazuro.furukawa @ >

Redundant IOC Introduction

Kazuro Furukawa

< kazuro . furukawa @ kek . jp >

For KEKB and Linac Control Groups




Accelerator Facilities for

Particle & Nuclear Physics,

Material Structure Science

Mt. Tsukuba


(at Tokai Site)








accelerator improvement and nobel prize
Accelerator Improvement and Nobel Prize







Dual Bunch e+


Crab Cavities and

Quasi-simultaneous Injection

Flexible Upgrades for Accelerator Operation

simultaneous injection requirements

Event System

Simultaneous Injection Requirements
  • Linac clients
    • KEKB 8-GeV e– 1nC x2 3.5-GeV e+ 1nC x2

(with 10nC primary e–)

    • PF 2.5-GeV e– 0.1nC
    • (PF-AR 3-GeV e– 0.2nC)
  • At first simultaneous top-up injections to three rings at KEKB and PF
    • Switching beams at 50Hz
    • For stable operation and higher quality exp. results
redundancy of servers at kek
Redundancy of Servers at KEK
  • Redundant Unix Servers at KEK (Linac, KEKB)
    • Was good for File server, Name server, Boot server, etc
    • Was very useful for availability even at maintenace time
  • Old Injector Linac Controls
    • Needed a gateway (Portable CA Server and Soft IOC)
      • From old controls to EPICS controls, and vice versa
    • could be a single point of failure
  • Started an investigation of Linux HA servers
    • Several products including Redhat Advanced server
    • Not good compared with vender Unix
    • And , of course, no EPICS features
      • Without internal data replication
      • No EPICS beacon handling, etc
redundancy of controllers at desy
Redundancy of Controllers at DESY
  • Cryogenic controls should run all the time
    • Continuously about 2years without interruption
    • Otherwise, it may cause quench
      • That may need long recovery time
  • The system for the HERA project was built without EPICS
  • The new generation had to be designed for the XFEL project
  • Mathias Clausen had a chance to stay at KEK in 2004
    • Discussion of merging the effort of DESY/XFEL and KEK/Linac
restart of the collaboration
Restart of the Collaboration
  • DESY continues the project
    • Several companies were asked to design the framework
  • I could not allocate resources at KEK until 2006
  • In 2006, I propossed Artem Kazakov to attend the development
    • He mainly attend the project in generalizing the code from VxWorks environment to other platforms
    • Using the OSI layer
some internal components
Some Internal Components
  • RMT: Redundancy Monitoring Task
    • Provides API to drive CCE, Scan, CA-rsrv, etc
  • CCE: Continuous Control Executive
    • Mirror the variables, states, etc
other epics development activities at kek
Other EPICS Development Activities at KEK
  • By A. Akiyama, et al
    • Embedded IOC on FPGA-based controller
  • By M. Satoh, et al
    • Embedded IOC on oscilloscopes
  • By A. Kazakov, et al
    • Redundant IOC (RIOC with OSI supports)
    • Redundant caGateway
    • ATCA IOC with HPI/SAF support for RIOC
      • ATCA for STF/ILC-LLRF and TCA for ERL-LLRF
    • Automatic test system environment
  • By K. Zagar, et al
    • Wireshark protocol analyzer for CA
  • By K. Furukawa, et al
    • Event-based fast control system