Download Neutrino Factory Workshop, IOP, 28th October 2003

Neutrino Factory Workshop, IOP,
28th October 2003
RF Systems
David M Wilcox
Summary
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Purpose
Who needs whom?
The RF System
Components of the RF system
Benefits
Questions
Purpose
• To ensure that UK industry becomes fully engaged in the
UKNF project
• Increase the credibility of the UK as a site for the machine
by creating a strong and expert manufacturing base
• To ensure that the UK benefits fully from the construction
of the Neutrino Factory
• To encourage innovation by firing the enthusiasm and
imagination of engineers
• To encourage technical networking between world class
scientists and world class UK companies.
Who needs whom?
The UKNF project needs your
• input of industrial know-how right from the start
• routine contribution to reality and feasibility checks
The UK NF project represents to industry
• a great technology driver in many subjects
• an opportunity for large, medium and small companies
• the chance to contribute manufacturing knowledge and
skills to a remarkable engineering endeavour
The RF system
An RF system in this analysis includes:• Everything from the isolator in the local 3-phase
supply up to and including the accelerating
cavities.
• The interlocking and protection circuitry
• The local control system and the provision of
control data to the central control system
RF System Cartoon
Connection to 3-phase
supply
Standard high quality power distribution components
………..but must not be overlooked!!
AC to DC conversion and
fast protection
•High efficiency
•Small size
•Low noise
•Good power factor
•Low stored energy
•Fast switch-off
Main RF Power Source
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Klystron
Gyro-device
Magnetron
IOT
Tetrode
Focus
magnets
External cavity
resonators
Piece part
manufacture
RF driver and ancilliary
power supplies
• RF driver – high stability, linear, narrow band
100W upwards
• Heater psu – low voltage medium DC current
isolated to high voltage
• Ion pump psu – high impedance 5 kV 10 :A
3 kV 1.5 mA
• Magnet psu – low voltage medium current
RF output window and
waveguide transition
RF window and output transition
designed as a matched unit
• Specialised RF design
• Specialised ceramic manufacture
• Precision mechanical construction
Circulator and power
measurement
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High power circulator
Directional couplers
Arc detectors
High power RF load
Splitters and combiners
Type
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‘Magic T’
Wilkinson
Gysel
Resonant cavity
Operating environment
– Short pulse > 50 MW, 5:s, X-band
– Long pulse > 10 MW, 2ms, L-band
– CW > 1 MW, HF to L-band
RF cavities, RF windows and
couplers
Room temperature RF cavities
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OFHC cavity construction
RF input couplers
Couplers for harmonic loading
High power RF windows
Superconducting RF cavities
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Niobium or niobium coated OFHC
Semiconductor standards of cleanliness
High mechanical stability
Cryostat technology
RF input couplers with high thermal gradient
High power RF windows
Control system
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Fault monitoring and fast protection system
Safety interlock system
Power stabilisation via local feedback
Data monitoring and processing system
Data transmission to central control
Data receive system from central control
Power adjustment by central control system
Installation
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Services – water, HP air etc.
Cabling
Wiring
Testing
Commissioning
Radio Frequency Quadrupole
LANSCE DIVISION RESEARCH REVIEW
Courtesy of LANL
Radio frequency quadrupole accelerating structure
RF hardware for Muon Cooling
Illustration from
RF CAVITIES FOR THE MUON AND NEUTRINO FACTORY COLLABORATION STUDY
A. Moretti, N. Holtkamp, T. Jurgens, Z. Qian and V. Wu, FNAL, Batavia, IL 60510, USA
LBNL - 805 MHz Low Power Test RF Cavity
Coutesy of Center for Beam Physics, LBNL work
supported principally by the U.S. Department of
Energy under Contract No. DE-AC03-76SF00098.
Benefits for industry
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Keeps industry at the leading edge
Provides challenges and training for engineers
Raises company technical image
Develops world-class technical contacts
Promotes Company’s self esteem
Good for UK plc
Any Questions?