FFAGs for medical applications

1
Introduction to the Non-Scaling Electron Model
Rob Edgecock
CCLRC Rutherford Appleton Laboratory For
the EMMA Collaboration

• Motivation
• Basic EMMA parameters
• Location
• Collaboration
• Introduction to next two talks

2
Motivation

• Much interest in non-scaling FFAGs over last
  1-2yrs
• For example

- baseline accelerator in Study 2a
- proton drivers
- proton and carbon therapy

• Non-scaling FFAGs have three unique
  features - huge/tiny momentum compaction -
  asynchronous acceleration - multi-resonance
  crossings
• Incomplete understanding hampering further
  designs
• Must build one! ? EMMA!

3
EMMA

• Scaled version of muon accelerator
• Flexible enough to learn about proton, carbon
• Parameters - electrons - 10 to 20
  MeV - 42 cells, doublet lattice - 37cm
  cell length - 16m circumference - RF
  every other cell - 1.3GHz, TESLA frequency
  - magnets 5cm x 2.5cm
• More details in next two talks!

4
Location
Need somewhere with flexible injector -
variable energy - variable bunch structure -
1.3GHz Experimental hall Infrastructure
5
Collaboration

• Proposal for part funding to FP6 NEST
• Collaboration of 14 institutes signed -
  CCLRC - CEA Saclay - CERN - Grenoble -
  Koc - Lancaster (Cockcroft) - Leeds -
  Liverpool (Cockcroft) - Rostock - Uppsala -
  BNL - FNAL - Kyoto - TRIUMF
• Other UK PP interested Adams, Brunel
• Industry IBA, HP Faraday/e2v, SigmaPhi
• Medical MRC, Ion Beams Network, Grenoble, Leeds
• PPARC Industrial Liaison, CCLRC spinning-out

6
Conclusions

• Considerable recent activity on non-scaling
  FFAGs - Neutrino Factory - Proton
  drivers - Medical applications
• Others possible
• Scaling non-scaling FFAGs ? paradigm shift
  in accel. technology
• Further non-scaling development needs EMMA
• Collaboration formed, location found funding
  next
• Next two talks Eberhard beam dynamics,
  lattice, performance Carol status of
  hardware development