Transcript RF Power Supplies - Indico

MICE RF System
Power Supplies, Control and Monitoring
Status report
February 2012
Chris White, STFC Daresbury Laboratory
MICE Collaboration Meeting CM32, RAL
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TH116
140 uF
29 uF
20 kV PSU to
ISIS design
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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
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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
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Daresbury Laboratory - Plant Room 1 - RF Test Area
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Cooling Water Systems (DL)
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DL site cooling system decommissioned
Ex-SRS twin-circuit chiller installed
– Demin for amplifiers
– Glycol for load
Now fully operational
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TH116 Circuit #1
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Mechanically complete
New fans fitted
Cathode modulator built
Motorised tuners
Electrical control panel
Heater controller
Safety interlocks
Tested to 1 MW RF output
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Cathode Modulator
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IGBT switch
IGBT control board
Potential divider
Zener diode array
TH116
38 kV
TH116 CATHODE MODULATOR CIRCUIT
From
4616
2R7
33R
IGBT
15k
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Fully operational
Second unit now complete
MICE RF Power Supplies - Status Report - CM32 February 2012
450Vdc
Trigger
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Circuit tuning motors
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TH116 Electrical Control Panel
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Fan control-gear
Heater controller (thyristor)
Circuit-breakers
Tuning control relays
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TH116 38kV Power Supply
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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)
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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)
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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
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Interlocks
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RF Power Supplies - MICE Hall Layout
RF Amplifiers
RF Power Supply Racks
Air Conditioning Units
RF Network/Control Racks
Layout of North Mezzanine
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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 Mar 12
(July 2012)
(December 2012)
(January 2013)
(May 2013)
(September 2013)
Tasks in red are required for TIARA (deadline in brackets)
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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
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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)
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Power Supplies – Construction Status - Step VI
RF Systems #3 and #4:
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TH116 amplifier circuit (ex-LBNL):
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Mechanical refurbishment complete, tuning motors fitted
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Electrical control panel to be built
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Second CERN amplifier at DL – to be assembled when required
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Cathode modulators to be built
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4616 amplifer circuit (ex-LBNL) refurbishment has started
20 kV PSU and Aux. Rack
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Fourth 4616 amplifier circuit to be purchased
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20 kV Power Supply racks to be built (some components available)
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4616 Auxiliary racks to be built (components to be ordered)
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38 kV Power Supply racks to be built (components to be ordered)
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TH116 Auxiliary racks to be built (components to be ordered)
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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
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