Decay ring design

The study of the neutrino oscillation between its different flavours needs pure
and very intense fluxes of high energy, well collimated neutrinos with a well
determined energy spectrum. A dedicated machine seems to be necessary
nowadays to reach the required flux. A new concept based on the β-decay
of radioactive ions which were accelerated in an accelerator chain was then
proposed. After ion production, stripping, bunching and acceleration, the unstable
ions are then stored in a racetrack-shaped superconducting decay ring.
Finally, the ions are accumulated in the decay ring until being lost. The incoming
beam is merged to the stored beam by using a specific RF system, which
will be presented here.
We propose here to study some aspects of the decay ring, such as its optical
properties, its RF system or the management of the losses which occur in the
ring (mainly by decay or by collimation).