FFAG Workshop

October 13–17, 2003
Brookhaven National Laboratory

There has been a recent resurgence of interest in using Fixed Field Alternating Gradient (FFAG) machines for acceleration. For proton acceleration, one can have very high repetition rates and superconducting magnets since the magnetic fields do not need to be ramped. For muons, one can achieve high average gradients and still have a significant number of passes through the cavities to help keep costs down.

There has been a great deal of recent progress in the design of FFAGs. Much of that progress has occurred through a series of small, informal workshops where, instead of just listening to a bunch of talks, we really work. This workshop continues that tradition. There will be talks at the beginning and end of each day so we can learn about what others have been doing before and during the workshop, but the bulk of the day will be devoted to working and interacting with one another to try to arrive at a better understanding of FFAG design, as well as trying to come up for designs for practical situations.

Here are some topics we hope to address:

  • What type of lattice is optimal for different situations? There has been evidence that triplet lattices are superior to FODO lattices, but some recent calculations seem to indicate that this may not true. What about doublet lattices, as in some recent scaling FFAG lattice designs?
  • Compare scaling and non-scaling lattices. In particular, for muon acceleration, it would be interesting to attempt to come up with a scaling design for the US input beam and a non-scaling design for the Japanese input beam.
  • Work on a design for a high-intensity FFAG-based proton source.
  • Study design paramters for an electron machine which would demonstrate acceleration in a non-scaling FFAG.

This list is by no means complete. Suggestions are welcome.

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J. Scott Berg <jsberg@bnl.gov>
22 October 2003.