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 EMMA Much interest in non-scaling FFAGs over last 1-2yrs For example: - baseline accelerator in Study 2a - proton drivers 1.5-GeV Booster 400-MeV DTL 28-GeV AGS HI Tandem 0.18 GeV H ‾ Achromat 0.18 GeV H ‾ Linac 10 GeV, 50 Hz, N = 5, FFAG with 10 13 protons per bunch 3 GeV, 50 Hz, h = 5, RCS (1 at 50 Hz, or 2 at 25 Hz) - 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 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 EMMA Need somewhere with flexible injector: - variable energy - variable bunch structure - ~1.3GHz Experimental hall Infrastructure EMMA

5. Collaboration EMMA 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 EMMA 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