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MICE RF System

MICE RF System. Power Supplies, Control and Monitoring Status report December 2011 Chris White, STFC Daresbury Laboratory. TH116. 140 uF. 29 uF. 20 kV PSU to ISIS design. 20 kV Power Supply for 4616. HV Power Supply 20 kV. 4616 Circuit Enclosure. Auxiliary Rack.

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MICE RF System

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  1. MICE RF System Power Supplies, Control and Monitoring Status report December 2011 Chris White, STFC Daresbury Laboratory

  2. MICE RF Design Review December 2011

  3. TH116 140 uF 29 uF 20 kV PSU to ISIS design MICE RF Design Review December 2011

  4. 20 kV Power Supply for 4616 HV Power Supply 20 kV 4616 Circuit Enclosure Auxiliary Rack RF Signal Generator (201 MHz) Control Crate Resistor bank RF cable RF output (co-ax) 4616 Tube PLC Crate Capacitor Charger 20 kV+ Screen cable Heater Controller Grid cable Water cooling circuits (4) RF solid state amplifier Earth Switch Compressed air cooling Crowbar (Ignitron) Grid PSU (300 Vdc) HV cable Dump Relay Screen Pulser (2000 Vdc) 0.95V 500A Capacitor 29 uF Screen PSU (600 Vdc) Heater Transformer MICE RF Design Review December 2011

  5. 38 kV Power Supply for TH116 HV Power Supply 38 kV TH116 Circuit Enclosure Auxiliary Rack Control Crate HV cable TH116 Tube Resistor bank RF output (co-ax) PLC Crate RF input from 4616 (co-ax) Capacitor Charger 40 kV+ Heater Controller Water cooling circuit Trigger pulse Cathode Modulator 450V DC Bias PSU Earth Switch Compressed air cooling Crowbar (Thyratron) Dump Relay 20V 500A Cooling Fans Capacitor 140 uF Heater Transformer MICE RF Design Review December 2011

  6. Daresbury Laboratory - Plant Room 1 - RF Test Area MICE RF Design Review December 2011

  7. Cooling Water Systems (DL) • DL site cooling system decommissioned • Ex-SRS twin-circuit chiller installed • Demin for amplifiers • Glycol for load • Now fully operational MICE RF Design Review December 2011

  8. TH116 Circuit #1 • Mechanically complete • New fans fitted • Cathode modulator built • Motorised tuners • Electrical control panel • Heater controller • Safety interlocks • Tested to 1 MW RF output MICE RF Design Review December 2011

  9. 38 kV TH116 TH116 CATHODE MODULATOR CIRCUIT From 4616 2R7 33R IGBT 450Vdc 15k Trigger Cathode Modulator • IGBT switch • IGBT control board • Potential divider • Zener diode array • Fully operational • Second unit almost complete MICE RF Design Review December 2011

  10. Circuit tuning motors MICE RF Design Review December 2011

  11. TH116 Electrical Control Panel • Fan control-gear • Heater controller (thyristor) • Circuit-breakers • Tuning control relays MICE RF Design Review December 2011

  12. TH116 38kV Power Supply • 2 x 70 μF Capacitors • Crowbar (thyratron) • Control unit • Power module • Dump relay • Earth switch • Charger (40 kV) • Resistors Crowbar testing Crowbar (Thyratron) HV Resistors HV Capacitors (140 uF) Power Supply Rack (Front) MICE RF Design Review December 2011

  13. RF HV Power Supplies - Components Crowbar (38 kV Thyratron) TH116 Circuit (lower part) 38 kV PSU – rear view 20 kV PSU & Aux. rack – front view 38 kV PSU – resistor bank HV PSU Control Unit 38 kV PSU – 1 MW RF output MICE RF Design Review December 2011

  14. RF Control & Monitoring System EPICS Server 4616 & TH116 Aux. Racks Network/ Controls Rack VME Crate Canbus modules DAC/ADC modules Typical I/L Digital signals/serial link PLC Crate (TH116) Interlocks Compressed air pressure Digital signals/serial link PLC Crate (4616) Interlocks Water flow Panel switches Enable Analog signals Grid PSU (4616) Enable Analog signals Screen PSU (4616) Enable Heater Controller (4616) Analog & digital signals Heater V and I Enable Heater Controller (TH116) Analog & digital signals Heater V and I Enable Analog & digital signals 450V DC Bias PSU Interlocks MICE RF Design Review December 2011

  15. RF Power Supplies - MICE Hall Layout RF Amplifiers Layout of North Mezzanine RF Power Supply Racks Air Conditioning Units RF Network/Control Racks MICE RF Design Review December 2011

  16. Timescale Current work in progress: • RF testing of System #1 with new 4616 and TH116 tubes Nov 11 to Dec11 Future work (Step V): time-scales to be confirmed • Assembly of CERN TH116 amplifier (System #2) ---------------------- (July 2012) • Test CERN amplifier at Daresbury ----------------------------------------- (December 2012) • Develop RF Control Systems • Pack & ship complete system #1 to RAL --------------------------------- (January 2013) • Install RF System #1 in MICE Hall ----------------------------------------- (May 2013) • Test complete RF system #1 at RAL -------------------------------------- (September 2013) • Construct & test 4616 #2 amplifier, power supply & controls • Construct & test TH116 #2 power supply & controls • Test complete RF system #2 at DL • Pack & ship system #2 to RAL • Install RF System #2 in MICE Hall • Test complete RF system #2 at RAL Tasks in red are required for TIARA (deadline in brackets) MICE RF Design Review December 2011

  17. Power Supplies – Construction Status - Step V RF System #1 built and under test (manually controlled) Work required: • Control & monitoring upgrade for 4616 Screen Pulser (2 kV) • Interface to MICE control system • Interface to PLC (Siemens S7-200) • Interface to Heater Controller (Eurotherm) • Interface to Low Level RF and Timing System RF System #2: • 4616 amplifer circuit refurbishment has started • 20 kV Power Supply rack to be built (some components available, some ordered) • 4616 Auxiliary rack to be built (components to be ordered) • CERN amplifier at DL – to be assembled when required • Cathode modulator virtually complete • 38 kV Power Supply rack to be built (components to be ordered) • TH116 Auxiliary rack to be built (components to be ordered) • Second dummy load to be procured for use with CERN amplifier (twin output) 4616 Tube & Connections MICE RF Design Review December 2011

  18. Power Supplies – Construction Status - Step VI RF Systems #3 and #4: • TH116 amplifier circuit (ex-LBNL): • Mechanical refurbishment complete, tuning motors fitted • Electrical control panel to be built • Second CERN amplifier at DL – to be assembled when required • Cathode modulators to be built • 4616 amplifer circuit (ex-LBNL) refurbishment has started • Fourth 4616 amplifier circuit to be purchased • 20 kV Power Supply racks to be built (some components available, some ordered) • 4616 Auxiliary racks to be built (components to be ordered) • CERN amplifier at DL – to be assembled when required • 38 kV Power Supply racks to be built (components to be ordered) • TH116 Auxiliary racks to be built (components to be ordered) 20 kV PSU and Aux. Rack MICE RF Design Review December 2011

  19. RF Power Supplies Questions ? 20 kV PSU (front) 38 kV PSU – Charger (rear) 38 kV PSU Dump Relay & Voltage divider 38 kV PSU - rear view MICE RF Design Review December 2011

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