A new ring structure for muon (g−2) measurements

In this storage ring of discrete magnets with uniform field and edge focusing, the field averaged over the orbit is independent of orbit radius (particle momentum). This ring is suitable for measuring the anomalous magnetic moment of the muon. The field, averaged over the orbit, can be calibrated by injecting horizontally polarized protons of the same momentum and measuring the proton (g−2) precession. The experiment then measures the ratio of muon to proton anomalous moments. A measurement of muon (g−2) at the level of 0.03 ppm appears feasible.