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Operations Machine Simulator . Adrian Johnson Senior Operations Technician Diamond Light Source

Operations Machine Simulator . Adrian Johnson Senior Operations Technician Diamond Light Source. Overview of Diamond. 3 rd Generation Light Source. Opened for Users in 2007. Currently 26 operational Beamlines. 4 Beamlines currently under construction.

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Operations Machine Simulator . Adrian Johnson Senior Operations Technician Diamond Light Source

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  1. Operations Machine Simulator. Adrian Johnson Senior Operations Technician Diamond Light Source

  2. Overview of Diamond • 3rd Generation Light Source. • Opened for Users in 2007. • Currently 26 operational Beamlines. • 4 Beamlines currently under construction. • Total of 32 Beamlines by 2017.

  3. Overview of Diamond Accelerators 100MeV Linac 3GeV Booster 3GeV Storage Ring • 561.6m Circumference. • 300mA stored beam. • Running in Top up (10min cycles).

  4. Why create a simulator? • The actual machine is rarely available for Training purposes. • When providing beam for Users aiming for Stability and reliability. • Machine development time is in high demand. • So a simulator would be useful for: • Training New Operators. • Refreshing Existing Operators knowledge. • Demonstration purposes. • Work Experience students. • Tours / Visits.

  5. Aims of the Operations Simulator • Software simulation of accelerator operation. • Not an Accelerator Physics Model. • Real time emulation of the machine sub systems. • Look, feel and behave realistic. • User interfaces that mimic the real machine • But not look too realistic – avoid confusion. • Relatively simple to create and maintain. • Empirical data taken from the machine used to create behavior. • Modular build to make it easy to add more complexity / realism.

  6. Simulator Architecture • Process Variable (PV) Store. • To store: States, Set points, Waveforms etc. • Process Script. • Reads States, Set points etc. • Mimics machine behavior, • Writes new States, etc. • User Interfaces. • Controls, On/Off, Start/Stop, Set points etc. • Displays of States, Plots, Set points, etc.

  7. Simulator Architecture • Process Variable (PV) Store. • Originally tried a PostGreSQL Database to hold ‘fake pv’s’. • Communication via Python was too slow, abandoned. • EPICS Soft IOC with Real PVs • IOC : Input / Output Controller • Runs in a terminal on a PC in the Control Room. • No hardware connected. • Currently about 200 PVs in Simulator. • Only acts as a PV store, doesn’t contribute to behavior.

  8. Simulator Architecture • Process Scripts. • Written in Python. • Small simple scripts to mimic the behavior of parts of the machine. • Easy to update, easy to add more complexity and realism. • Run independently in terminals on same PC as the IOC. • Processes Written So Far. • GUN, • Gun RF, Gun Charge. • LINAC, • Linac RF, Linac Charge and Linac to Booster Efficiency, . • BOOSTER • Booster RF, BR Charge / Current, Booster to Storage Ring Efficiency. • STORAGE RING RF, • Cavity Volts and Phase, Forward Power. • BEAM, • Beam Injection, Beam Lifetime, Fill Pattern, Power Demand. • STORAGE RING MPS, • Interlocks for Temperatures, Flows, Vacuum, Beam Position.

  9. Simulator Architecture • Gun Process as an example.

  10. Gun Process Behaviour • GUN Bias adjustments vs GUN Charge. Multi-Bunch Single-Bunch Striptool plots of Simulator pvs

  11. Simulator Architecture • Simulation Schematic.

  12. Behaviour Examples Lifetime vs Cavity Volts Effect of Linac Volts on Charge and Currents Striptool plots of Simulator pvs

  13. Simulator User Interfaces • User Interfaces. • Behave like real machine with multiple operators. • Mostly Written in Python, • EDM being phased out at Diamond, • Made Obvious which is Simulator and which is Real. • Tried to retain some realism. Real Machine GUI Simulator GUI

  14. Simulator User Interface examples Real GUI Simulator GUI

  15. Trip Simulator • Trip Editor to create / edit trips. • Defines the states for a single or set of PVs to initiate a trip. • Creates a saved set. • Trip Simulator • Select a pre-defined trip, • Select a Random trip.

  16. Trip Simulator • Effect of Cell12 Gauge Controller trip.

  17. Where Next • Power Supplies • Most are On / Off effects. • Transfer line Steering impacts Injection • Pulsed magnets (amplitude and timing) impact Injection. • Beam Properties • Orbit, • Tunes, • Coupling, • Top up. • PSS • Mostly On / Off effects. • Radiation monitors. • Vacuum. • Insertion Devices. • Front Ends.

  18. Summary • Turned out to be surprisingly simple to create an Operations machine simulator. • It works well, feels and behaves realistic. • Worth doing, • So far only used by Work experience students. • It’s now available to any new Operators for training. • Expanding all the time. • Long term project to keep it growing and up to date.

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