Muon cooling in the RFOFO ring cooler

The performance of the ring described here compares favorably with the linear cooling channel used in the second U.S. Neutrino Factory Study [ref.1]. The 6D phase space density of an idealized ring is increased by a factor of 238, compared with the linear channel's factor of only 15. The simulations make use of fully realistic magnetic fields, and include absorber and rf cavity windows, and empty lattice cells for injection/extraction.