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Redundant IOC Introduction

< kazuro.furukawa @ kek.jp >. 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

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  1. < kazuro.furukawa @ kek.jp > Redundant IOC Introduction Kazuro Furukawa < kazuro . furukawa @ kek . jp > For KEKB and Linac Control Groups Jul.2009.

  2. KEK : Accelerator Facilities for Particle & Nuclear Physics, Material Structure Science Mt. Tsukuba J-PARC (at Tokai Site) KEKB ATF STF PF-AR cERL PF Linac

  3. Accelerator Improvement and Nobel Prize Belle/KEK Feb.2005 Continuous Injections May.2000 Apr.2003 Dual Bunch e+ Dec.2008 Crab Cavities and Quasi-simultaneous Injection Flexible Upgrades for Accelerator Operation

  4. 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

  5. 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

  6. 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

  7. 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

  8. Redundant IOC

  9. 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

  10. 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

  11. Thank you

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