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MICE RF System Power Supplies, Control and Monitoring Status report December 2011 Chris White, STFC Daresbury Laboratory MICE RF Design Review December 2011 2 TH116 140 uF 29 uF 20 kV PSU to ISIS design MICE RF Design Review December 2011 3 20 kV Power Supply for 4616 Auxiliary Rack RF Signal Generator (201 MHz) HV Power Supply 20 kV 4616 Circuit Enclosure Control Crate Resistor bank RF cable PLC Crate Heater Controller Capacitor Charger 20 kV+ 4616 Tube Screen cable Grid cable RF solid state amplifier Grid PSU (300 Vdc) Screen Pulser (2000 Vdc) Screen PSU (600 Vdc) RF output (co-ax) Water cooling circuits (4) Earth Switch Crowbar (Ignitron) Compressed air cooling HV cable Dump Relay 0.95V 500A Capacitor 29 uF Heater Transformer MICE RF Design Review December 2011 4 38 kV Power Supply for TH116 Auxiliary Rack HV Power Supply 38 kV Control Crate Resistor bank PLC Crate Heater Controller 450V DC Bias PSU Capacitor Charger 40 kV+ TH116 Circuit Enclosure HV cable TH116 Tube RF input from 4616 (co-ax) RF output (co-ax) Water cooling circuit Trigger pulse Cathode Modulator Earth Switch Compressed air cooling Crowbar (Thyratron) Dump Relay Capacitor 140 uF Cooling Fans 20V 500A Heater Transformer MICE RF Design Review December 2011 5 Daresbury Laboratory - Plant Room 1 - RF Test Area MICE RF Design Review December 2011 6 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 7 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 8 Cathode Modulator • • • • IGBT switch IGBT control board Potential divider Zener diode array TH116 38 kV TH116 CATHODE MODULATOR CIRCUIT From 4616 2R7 33R IGBT 15k • • Fully operational Second unit almost complete 450Vdc Trigger MICE RF Design Review December 2011 9 Circuit tuning motors MICE RF Design Review December 2011 10 TH116 Electrical Control Panel • • • • Fan control-gear Heater controller (thyristor) Circuit-breakers Tuning control relays MICE RF Design Review December 2011 11 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) MICE RF Design Review December 2011 Power Supply Rack (Front) 12 RF HV Power Supplies - Components HV PSU Control Unit TH116 Circuit (lower part) 20 kV PSU & Aux. rack – front view 38 kV PSU – rear view 38 kV PSU – 1 MW RF output 38 kV PSU – resistor bank MICE RF Design Review December 2011 Crowbar (38 kV Thyratron) 13 RF Control & Monitoring System EPICS Server 4616 & TH116 Aux. Racks Network/ Controls Rack VME Crate Digital signals/serial link Digital signals/serial link PLC Crate (TH116) Interlocks PLC Crate (4616) Interlocks Typical I/L Compressed air pressure Water flow Panel switches Analog signals Grid PSU (4616) Enable Analog signals Screen PSU (4616) Enable Heater Controller (4616) Enable Heater Controller (TH116) Enable Canbus modules DAC/ADC modules Analog & digital signals Analog & digital signals Analog & digital signals Heater V and I Heater V and I Enable 450V DC Bias PSU MICE RF Design Review December 2011 Interlocks 14 RF Power Supplies - MICE Hall Layout RF Amplifiers RF Power Supply Racks Air Conditioning Units RF Network/Control Racks Layout of North Mezzanine MICE RF Design Review December 2011 15 Timescale Current work in progress: • RF testing of System #1 with new 4616 and TH116 tubes Future work (Step V): time-scales to be confirmed • Assembly of CERN TH116 amplifier (System #2) ---------------------• Test CERN amplifier at Daresbury ----------------------------------------• Develop RF Control Systems • Pack & ship complete system #1 to RAL --------------------------------• Install RF System #1 in MICE Hall ----------------------------------------• Test complete RF system #1 at RAL -------------------------------------• 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 Nov 11 to Dec11 (July 2012) (December 2012) (January 2013) (May 2013) (September 2013) Tasks in red are required for TIARA (deadline in brackets) MICE RF Design Review December 2011 16 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 4616 Tube & RF System #2: Connections • 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) MICE RF Design Review December 2011 17 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 20 kV PSU and Aux. Rack • 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) MICE RF Design Review December 2011 18 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 19