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Wayne Lewis

Australian Synchrotron Beamline Controls Design and Implementation. Wayne Lewis. Beamline Controls Design and Implementation. Beamline summary Resourcing Technology decisions Standards development Infrastructure Individual beamline implementations. Beamline summary. Phase 1

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Wayne Lewis

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  1. Australian Synchrotron Beamline Controls Design and Implementation Wayne Lewis

  2. March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis Beamline Controls Design and Implementation • Beamline summary • Resourcing • Technology decisions • Standards development • Infrastructure • Individual beamline implementations

  3. Beamline summary • Phase 1 • Infrared Spectroscopy • Protein Crystallography • Powder Diffraction • X-ray Absorption Spectroscopy • Soft X-ray Spectroscopy March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  4. Beamline summary • Phase 2 • Microspectroscopy • Imaging and Medical Therapy • Small/Wide Angle Scattering • Protein Crystallography 2 March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  5. Resourcing • Staff • Development equipment • External resources March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  6. Technology decisions - background Accelerator controls • EPICS controls throughout • Standard PC based IOCs • No use of VME • GUI implementedin Delphi March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  7. Technology decisions - background Beamline controls • No pre-conceived ideas • Desire to use open source software • Desire to maintain consistency with existing accelerator controls • Determine approach at comparable facilities and beamlines • Desire to have single control system for all beamlines March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  8. Technology decisions Hardware • Off the shelf products • PC based IOCs • VME where essential (using PCI/VME bridge) • In-house motion control • Protection systems March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  9. Technology decisions Protections systems • Personnel protection • Equipment protection Operatingsystem • Avoid vxWorks • Use standard Linux distributions • Determine need for real-time OS March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  10. Technology decisions – control system software • Six control systems reviewed • Selection criteria established • Candidates ranked • EPICS was the winner March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  11. Technology decisions – user interface software • Engineering/staff interface • Use EPICS tools • Ease of use/speed of deployment • Experimental user interface • No single right answer for all beamlines March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  12. March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis Standards development • Naming convention • IP addressing scheme • GUI standards • Motion control connectors • Coordinate system

  13. Infrastructure Network • Individual VLAN for each beamline • EPICS gateway to accelerator Personnel safety system • Same system as storage ring • PLC code developed in-house • Separate system for each beamline • Carefully defined interfaces between beamline and accelerator protection systems Data storage March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  14. March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis Powder diffraction • Experimental requirements • Single energy experiments • Multiple sample environments • Precision sample and detector positioning • Microstrip detector • High-resolution detectors • Scanning – step and on-the-fly • Relatively low data volume and rate • No well defined user interface preference

  15. March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis Powder diffraction • Photon delivery system • Turnkey contract • Design, construction and supply of optics • Basic controls included in scope of supply • Equipment protection included in scope of supply • Controls involvement at all stages essential • Defined minimum EPICS releases to be used • Definition of interfaces and site standards • Close working relationship with controls vendor • Ongoing involvement through commissioning phase • 40 motors • 2 cameras, 1 equipment protection PLC • Beam condition and position monitoring

  16. Powder diffraction Endstation • Individual components purchased separately • In-house integration effort • In-house motion controller • Close interaction with detector supplier • Sample environments • 15 motors March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  17. Powder diffraction User interface • Using ‘xxx’ application from synApps • Dedicated GUI for detector • EPICS ‘sscan’ record to manage data collection • Detector controls modified to be ‘EPICS-aware’ March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  18. March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis Powder diffraction • EPICS usage • Photon delivery system • Motion control • Cameras • Serial devices • PLC • Endstation • Motion control • Scaler • Sample environment • Save/restore • Scan • PLC – Modbus • Digital IO • Multi-channel scaler

  19. March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis Powder diffraction • Non-EPICS usage • Microstrip detector • Analog/digital electronics • Embedded server • GUI is client • Sets up acquisition then reads out and saves data • Commissioning • External expert assistance • Photon delivery system • Detector

  20. March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis Protein crystallography • Experimental requirements • Single energy experiments • Single sample environment • Well defined user interface • Commissioning endstation followed by final endstation • Synchronisation of sample rotation and shutter • High data volume and rate • No scanning

  21. March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis Protein crystallography • Photon delivery system • Same as powder diffraction • Same vendor, very similar optics • 30 motors • 2 cameras • 2 beam position monitors • Equipment Protection PLC • Ion chamber

  22. Protein crystallography Endstation • Commissioning endstation for twelve months • CCD detector • Robotic sample loading March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  23. Protein crystallography Endstation • High speed shutter • High precision sample rotation • Cryogenic sample environment • Sample monitoring • Sample alignment • Sample visualisation • 22 motors • Energy dispersive detector • Data storage – 40TB March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  24. Protein crystallography March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  25. Protein crystallography Control system • Mandate for BluIce user interface • Decide between SSRL and GMCA implementations March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  26. Protein crystallography Comparison of SSRL and GMCA controls GMCA SSRL March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  27. Protein crystallography SSRL vs GMCA • SSRL benefits • Use existing hardware drivers • Use existing scripted functions • Easier integration of specific hardware • Support from SSRL controls people • Minimal development work required • Can take advantages of updates from SSRL • GMCA benefits • “Simpler” architecture • No new control system to learn March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  28. March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis Protein crystallography • EPICS usage • Photon delivery system • Motion control • Cameras • Serial devices • PLC • Endstation • Motion control

  29. March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis Protein crystallography • Non-EPICS usage • Endstation • SSRL DCSS control system server • All experimental scripting • Screening database • Detector interface • Robot interface • MCA interface • User authentication • BluIce user interface • Motion control programs • Commissioning • External expert assistance • Photon delivery system • Detector • SSRL controls

  30. X-ray absorption spectroscopy Experimental requirements • Energy scanning • Step scanning and on-the-fly scanning • No well defined user interface • Basic energy dispersive detector followed by multi-element detector • Low data volume and rate • EXAFS and XANES techniques March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  31. March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis X-ray absorption spectroscopy • Photon delivery system • High-performance scanning monochromator • Cryogenic cooling system • 40 motors • Beam visualisation • Beam position control

  32. X-ray absorption spectroscopy Endstation • Single MCA detector • Multi-element Ge detector • Multiple ion chambers March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  33. X-ray absorption spectroscopy Endstation • Scanning is fundamental • Require both on-the-fly scans and step scans • On-the-fly handled in hardware • Step scanning handled by EPICS scan record March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis

  34. March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis X-ray absorption spectroscopy • EPICS usage • Photon delivery system • Motion control • Serial devices • PLC • Endstation • Motion control • Scanning • MCA • Digital IO • Analog IO • Scaler • Multi-channel scaling

  35. March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis X-ray absorption spectroscopy • EPICS usage • User interface • MEDM • IDL – ScanSee • Python EXAFS scan front end

  36. March 2008 EPICS Collaboration Meeting, SSRF, Shanghai Wayne Lewis Summary • Turnkey contracts • Work closely with contractors • Develop standards • Develop in-house experience and understanding • Common systems where possible • Customise for experimental requirements • Use of external expertise • Use of EPICS makes much possible

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