MICE RF System Power Supplies, Control and Monitoring Status report February 2012 Chris White, STFC...

MICE RF System

Power Supplies, Control and Monitoring Status report

February 2012

Chris White, STFC Daresbury LaboratoryMICE Collaboration Meeting CM32, RAL

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


20 kV PSU to ISIS design

140 uF

29 uF

TH116

20 kV Power Supply for 4616


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 kVAuxiliary Rack

Earth Switch

Water cooling circuits (4)

Compressed air coolingHV cable

0.95V500A

Grid cable

Screen cable

RF cable RF output (co-ax)

4616 Circuit Enclosure

Resistor bank

38 kV Power Supply for TH116

MICE RF Power Supplies - Status Report - CM32 February 2012

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Capacitor Charger 40 kV+

Control Crate

PLC Crate

Heater Controller

450V DC Bias PSU

TH116 Tube

Heater Transform

er

Crowbar (Thyratron)

Capacitor 140 uF

Dump Relay

HV Power Supply 38 kVAuxiliary Rack

Earth Switch

Water cooling circuit

Compressed air cooling

HV cable

20V500A

RF input from 4616 (co-ax)

RF output (co-ax)

TH116 Circuit Enclosure

Cathode Modulator

Cooling Fans

Trigger pulse

Resistor bank


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Daresbury Laboratory - Plant Room 1 - RF Test Area


Cooling Water Systems (DL)

• 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

• Mechanically complete• New fans fitted• Cathode modulator built• Motorised tuners• Electrical control panel• Heater controller• Safety interlocks • Tested to 1 MW RF output


Cathode Modulator

• IGBT switch• IGBT control board• Potential divider• Zener diode array

38 kV

Trigger

450Vdc15k

2R733R

From 4616

IGBT

TH116

TH116 CATHODE MODULATOR CIRCUIT

• Fully operational• Second unit now complete


Circuit tuning motors


TH116 Electrical Control Panel

• Fan control-gear• Heater controller (thyristor) • Circuit-breakers• Tuning control relays


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 Resistors HV Capacitors (140 uF) Power Supply Rack (Front)

Crowbar testing


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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

RF Control & Monitoring System


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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)



Interlocks

Panel switches

Water flow

Compressed air pressure

Heater V and I

Heater V and I

Interlocks

Typical I/LPLC Crate (TH116)

Digital signals/serial link

Screen PSU (4616)

Analog signals

Analog signals Enable

Enable

Enable

Enable

Enable

Interlocks


RF Power Supplies - MICE Hall Layout

Layout of North Mezzanine

Air Conditioning Units

RF Amplifiers

RF Power Supply Racks

RF Network/Control Racks


TimescaleCurrent work in progress:• RF testing of System #1 with new 4616 and TH116 tubes Nov 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)


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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

– 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


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


RF Power Supplies

Questions ?

20 kV PSU (front)

38 kV PSU - rear view38 kV PSU Dump Relay & Voltage divider

38 kV PSU – Charger (rear)

MICE RF System Power Supplies, Control and Monitoring Status report February 2012 Chris White, STFC...

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