Decay rings In the Neutrino Factory neutrinos are generated from muon decays according to : Neutrinos are aimed at far detectors by collecting muons in storage rings with long straight sections pointing at the distant experimental facilities. The storage rings dip into the ground with angles of 18 and 36 degrees, for baseline of 4000 and 7500 km, respectively. Two geometries of ring have been considered. The geometry shown in figure is designed to store µ  with a single straight pointing into the ground. The return straight is used for collimation, RF and tune control. A development of this concept can accommodate counter-rotating muons of both signs.