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. MICE RF Design Review December 2011
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. MICE RF Design Review December 2011
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
Cooling Fans
20V
500A
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. MICE RF Design Review December 2011
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. MICE RF Design Review December 2011
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 almost complete
MICE RF Design Review December 2011

10. MICE RF Design Review December 2011
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. MICE RF Design Review December 2011
TH kV 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 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
Crowbar (38 kV Thyratron)
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
Analog signals
Grid PSU (4616)
Enable
Analog signals
Screen PSU (4616)
Enable
Heater Controller (4616)
Enable
Analog & digital signals
Heater V and I
Heater Controller (TH116)
Enable
Analog & digital signals
Heater V and I
Analog & digital signals
Enable
450V DC Bias PSU
Interlocks
MICE RF Design Review December 2011

15. 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

16. MICE RF Design Review December 2011
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. MICE RF Design Review December 2011
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