1. What next at Daresbury? Just thinking aloud… Roger Barlow ThorEA meeting 17 th April 2009

2. Where we are Building EMMA, the world’s first nonscaling FFAG This is an asset (USP) It does NOTHING for ADSRs. 20 MeV electrons @ pA are not 1 GeV protons @ mA. But it is a step Also studies underway on spallation, reactor core, etc.

3. Where are we going to? Design and build a Thorium ADSR, hopefully with an nsFFAG providing the accelerator (Other accelerator solutions are acceptable.)

4. How to get there Discussions between RB, Bob Cywinski, Guenther Rosner and others. The AESIR project Accelerator Energy System with Inbuilt Reliability

5. Stage I: LOKI The Low-key demonstrator 35 MeV H - system (protons at Daresbury!) High current. (1 mA? 10 mA?) Commercial source RF Quadrupole Standard Linac Study reliability and build it in from the start. Learn from mistakes Looks like the Front End Test Stand?? Copy? Move? Also measurements of cross sections on Thorium (at CERN?),simulations, materials studies 2-3 years. £17M

6. Stage 2: FREA FFAG Research for the Energy Amplifier Add a 2 nd stage ring that boost energy to 390 MeV Why 390? Pion production. But ~300 would still be interesting Produces spallation. Not as much as 1 GeV, but enough to be interesting. Continue to emphasise reliability. Increase Current to 10 mA Use a proton nsFFAG – with a cyclotron as fallback. Or Linac Gives useful proton machine (c.f. TRIUMF, PSI). 99m Tc production? Links to proton therapy but details very different. (High current. One energy. More space) 4-5 years. £50 M

7. Stage 3: Thor Add a second ring to give 1 GeV nsFFAG, with RCS and Linac as backup options Use with a real target and nuclear core for production ADSR system Where? Not Daresbury. Sellafield?? Just power, or partitioning/transmutation?

8. Costs and Funding Economic stimulus package? Investment in Daresbury Campus? DIUS, STFC, NWDA?? Stage 1: £17M (£8M new) 2-3 Years Stage 2: £50 M (£40M new) +4-5 years Stage 3: £Bn – funded by/with power companies Accelerator cost £100M (i.e. £10M<cost<£1000M)

9. Could it happen? Possibly. Ticks many boxes in Govt fundng criteria Builds up activity on Daresbury ‘innovation’ campus Makes sensible use of infrastructure at Daresbury left by SRS Increasing interest and activity Possibly not. But if we don’t try, it certainly won’t.