Prototype cavity proposal

1
Prototype cavity proposal
2
Development of capability

• CCLRC/PPARC seeks to position UK strategically
  w.r.t.
• International Linear Collider
• Neutrino Factory
• Other accelerator-based scientific facilities
• Key component high-gradient cavities
• Develop manufacturing capability
• Neutrino Factory application
• Proton driver
• Front-end 234 MHz, RFQ, buncher cavities,
  chopper
• Could be SC linac SPL (352 MHz), FNAL (1.3 GHz),
  
• Synergy with ILC
• Phase rotation, buncher and cooling channel
• Require large aperture ? low frequency
• Transport solenoidal channel ? cavities operate
  in strong B field
• Use warm cavities at low (200 MHz 300 MHz)
  frequencies

3
Focus on MICE cavities

• Development of capability
• Benefits of MICE cavity construction
• Significantly enhance MICE programme
• High-profile UK-based international accelerator
  RD experiment
• Bring forward Phase II (cooling measurement)
• High impact
• Ambitious, but achievable, timescale required
• Design, manufacture, commissioning in 2 3 years
• High return (capability)
• Carry out programme in international context
• MICE is an international collaboration, likely
  collaboration between LBNL, FNAL, GVA, UK to
  produce module
• High visibility

4
MICE RFCC module
5
Critical issue surface finish
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Collaboration

• So far
• US LBNL (some advice/contact from/with JLab)
• UK IC Phys/Mech.Eng., advice and contact from
  CCLRC, RAL and DL
• Proposal
• Cavity
• US LBNL, FNAL (MuCool, MTA), JLab?
• UK IC, CCLRC, HPRF Faraday (E2V, Shakespeare)
  Cockroft
• Note Industrial CASE application ICL/HPRF
  Faraday submitted
• Coupling coil
• GVA
• Timescale
• Submit October/November

7
Outline of proposal

• Design, manufacture and commission 201MHz cavity
• Operate in magnetic field ?
• Resources
• PPARC Capital, some staff, student
• RDA Non-recurring expenses
• CCLRC Expertise, i.e. staff time
• In kind equipment (network
• analyser, pump?, coupler?)
• MICE High-power test stand
• Could be DL or MTA (FNAL) depends on schedule

8
Design update

• Graham Gosling (ICL/Mech.Eng.)
• Begun detailed design of tuning mechanism
• 8 (rather than 6) tuners
• Hydraulic activation
• Modular construction
• Motivated by ease of assembly and maintenance
• May lend itself to staged build

9
Figures from GG

• Iteration n-1 as GG on vacation

10
Next steps

• Lead authors
• S.Bowater (HPRF), K.Long (ICL), R.Saviour (CI)
• First draft by MICE collaboration meeting
• 22Oct05