1. MICE RF System Power Supplies, Control and Monitoring Status report February 2012 Chris White, STFC Daresbury Laboratory MICE Collaboration Meeting CM32, RAL

2. MICE RF Power Supplies - Status Report - CM32 February 2012 2

3. 3 20 kV PSU to ISIS design 140 uF 29 uF TH116

4. 20 kV Power Supply for 4616 MICE RF Power Supplies - Status Report - CM32 February 2012 4 Capacitor Charger 20 kV+ Control Crate PLC Crate Heater Controller Grid PSU (300 Vdc) Screen PSU (600 Vdc) Screen Pulser (2000 Vdc) RF solid state amplifier RF Signal Generator (201 MHz) 4616 Tube Heater Transformer Crowbar (Ignitron) Capacitor 29 uF Dump Relay HV Power Supply 20 kV Auxiliary Rack Earth Switch Water cooling circuits (4) Compressed air cooling HV cable 0.95V 500A Grid cable Screen cable RF cableRF output (co-ax) 4616 Circuit Enclosure Resistor bank

5. 38 kV Power Supply for TH116 MICE RF Power Supplies - Status Report - CM32 February 2012 5 Capacitor Charger 40 kV+ Control Crate PLC Crate Heater Controller 450V DC Bias PSU TH116 Tube Heater Transformer Crowbar (Thyratron) Capacitor 140 uF Dump Relay HV Power Supply 38 kV Auxiliary Rack Earth Switch Water cooling circuit Compressed air cooling HV cable 20V 500A RF input from 4616 (co-ax) RF output (co-ax) TH116 Circuit Enclosure Cathode Modulator Cooling Fans Trigger pulse Resistor bank

6. MICE RF Power Supplies - Status Report - CM32 February 2012 6 Daresbury Laboratory - Plant Room 1 - RF Test Area

7. MICE RF Power Supplies - Status Report - CM32 February 2012 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

8. MICE RF Power Supplies - Status Report - CM32 February 2012 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

9. MICE RF Power Supplies - Status Report - CM32 February 2012 9 Cathode Modulator IGBT switch IGBT control board Potential divider Zener diode array 38 kV Trigger 450Vdc 15k 2R7 33R From 4616 IGBT TH116 TH116 CATHODE MODULATOR CIRCUIT Fully operational Second unit now complete

10. MICE RF Power Supplies - Status Report - CM32 February 2012 10 Circuit tuning motors

11. MICE RF Power Supplies - Status Report - CM32 February 2012 11 TH116 Electrical Control Panel Fan control-gear Heater controller (thyristor) Circuit-breakers Tuning control relays

12. MICE RF Power Supplies - Status Report - CM32 February 2012 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 (Thyratron)HV ResistorsHV Capacitors (140 uF)Power Supply Rack (Front) Crowbar testing

13. MICE RF Power Supplies - Status Report - CM32 February 2012 13 RF HV Power Supplies - Components Crowbar (38 kV Thyratron) TH116 Circuit (lower part) 38 kV PSU – rear view20 kV PSU & Aux. rack – front view 38 kV PSU – resistor bank HV PSU Control Unit 38 kV PSU – 1 MW RF output

14. RF Control & Monitoring System MICE RF Power Supplies - Status Report - CM32 February 2012 14 Network/ Controls Rack VME Crate Canbus modules DAC/ADC modules EPICS Server Heater Controller (4616) 450V DC Bias PSU Digital signals/serial link 4616 & TH116 Aux. Racks PLC Crate (4616) Grid PSU (4616) Analog & digital signals Heater Controller (TH116) Analog & digital signals Interlocks Panel switches Water flow Compressed air pressure Heater V and I Interlocks Typical I/L PLC Crate (TH116) Digital signals/serial link Screen PSU (4616) Analog signals Enable Interlocks

15. MICE RF Power Supplies - Status Report - CM32 February 2012 15 RF Power Supplies - MICE Hall Layout Layout of North Mezzanine Air Conditioning Units RF Amplifiers RF Power Supply Racks RF Network/Control Racks

16. MICE RF Power Supplies - Status Report - CM32 February 2012 16 Timescale Current work in progress: RF testing of System #1 with new 4616 and TH116 tubesNov 11 to Mar 12 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)

17. MICE RF Power Supplies - Status Report - CM32 February 2012 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

18. MICE RF Power Supplies - Status Report - CM32 February 2012 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) 4616 Auxiliary racks to be built (components to be ordered) 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

19. MICE RF Power Supplies - Status Report - CM32 February 2012 19 RF Power Supplies Questions ? 20 kV PSU (front) 38 kV PSU - rear view38 kV PSU Dump Relay & Voltage divider 38 kV PSU – Charger (rear)