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A PC/Linux-based Control System with EPICS for RFGTB

Detailed overview of RF-Gun Test Bench (RFGTB) in KEK, utilizing EPICS on PC/Linux for control of small-scaled experimental facility. Highlights pros and cons of the system and offers insights for newcomers to EPICS programming.

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A PC/Linux-based Control System with EPICS for RFGTB

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  1. A PC/Linux-based Control System with EPICS for RFGTB S. Araki, K. Hirano, J. Odagiri, T.T. Nakamura and N. Terunuma High Energy Research Accelerator Organization, KEK EPICS Meeting @RICOTTI 2004, Dec 10, Tokai

  2. Contents • RF-Gun Test Bench (RFGTB) in KEK • Control System of RFGTB • Running EPICS on PC/Linux • EPICS for small-scaled experimental facility • Conclusions

  3. RF-Gun Test Bench (RFGTB) • The aim of RFGTB is to develop aｎ RF-Gun that produces a high flux x-ray by compton scattering of Laser light • Joint project by National Institute of Radiological Science (NIRS) and KEK • Multi-bunch photo-cathode RF-Gun • Constructed in Assembly Hall at KEK

  4. RF-Gun Test Bench (RFGTB) • Beam energy (max) : 7 MeV • Beam charge (max) : 5 nC/bunch • Number of benches (max) : 100 /pulse • RF frequency : 2856 MHz • Laser wavelength : 266 nm • Solenoid magnetic field (max) : 3.2 kGauss

  5. RF-Gun in RFGTB

  6. Schematic Diagram of the Control System

  7. PC/Linux running IOC core and OPI tools

  8. Control Room of RFGTB

  9. FA-M3 connected tothe PC/Linux IOC

  10. CC/NET • Pipeline operation of CAMAC cycle • Designed for DAQ application • Very high transfer rate　(up to 3 MB/sec) • PC/104-Plus SBC embedded • Linux (kernel 2.4) • Comes with Kernel level driver & user level library • Can work as an IOC

  11. CC/NET in operationas an IOC

  12. Sequencer Logic forRF-conditioning • Main purpose: • automatic control of the aging procedure • We developed: • sequencer programs using SNL • control panel using MEDM

  13. Control Panel (MEDM)

  14. Status Panel (MEDM)

  15. Pros and Cons (Pros) • PC/Linux-based system with EPICS gives us: • Cost-effective solution on both HW and SW • Easy way to integrate control subsystems on CA over the Ethernet connection • Rapid debugging cycle, since booting up an IOC-program is just a snap • Lots of templates of application software from existing other large-scaled accelerator control systems

  16. Pros and Cons (Cons) • EPICS takes up some time from new comers: • To get familiar with the environment for IOC application development • To install OPI tools, since it requires some skills on Unix, and can be a hustle in some cases • To choose appropriate tools from many options • A packaged distribution with minimum tool kits for beginners will be highly appreciated by new comers

  17. Conclusions • We have built a fully-PC/Linux-based control system with EPICS for RFGTB operation • Conditioning of the RF-Gun is being carried out with the control system successfully • The system uses most of the essential tools of EPICS, such as IOCs, a display tool, and a channel archiving tool • Something in order to ease new comers into EPICS is required

  18. Thanks for your attention! ARAKI, Sakae

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