Neutrino Factory Workshop, IOP, 28th October 2003

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Neutrino Factory Workshop, IOP, 28th October 2003

• RF Systems
• David M Wilcox

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Summary

• Purpose
• Who needs whom?
• The RF System
• Components of the RF system
• Benefits
• Questions

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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.

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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

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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

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RF System Cartoon
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Connection to 3-phase supply

• Standard high quality power distribution
  components
• ..but must not be overlooked!!

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AC to DC conversion and fast protection

• High efficiency
• Small size
• Low noise
• Good power factor
• Low stored energy
• Fast switch-off

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Main RF Power Source

• Klystron
• Gyro-device
• Magnetron
• IOT
• Tetrode

Focus magnets
Piece part manufacture
External cavity resonators
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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

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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

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Circulator and power measurement

• High power circulator
• Directional couplers
• Arc detectors
• High power RF load

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Splitters and combiners

• Type
• Magic T
• Wilkinson
• Gysel
• Resonant cavity
• Operating environment
• Short pulse gt 50 MW, 5s, X-band
• Long pulse gt 10 MW, 2ms, L-band
• CW gt 1 MW, HF to L-band

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RF cavities, RF windows and couplers

• Room temperature RF cavities
• OFHC cavity construction
• RF input couplers
• Couplers for harmonic loading
• High power RF windows
• Superconducting RF cavities
• 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

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Control system

• 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

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Installation

• Services water, HP air etc.
• Cabling
• Wiring
• Testing
• Commissioning

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Radio Frequency Quadrupole
LANSCE DIVISION RESEARCH REVIEW Courtesy of LANL
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Radio frequency quadrupole accelerating structure
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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
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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.
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Benefits for industry

• Keeps industry at the leading edge
• Provides challenges and training for engineers
• Raises company technical image
• Develops world-class technical contacts
• Promotes Companys self esteem
• Good for UK plc

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Any Questions?