A Strong Focussing Ring, as Beam Stretcher for Synchro-Cyclotrons

The possibility of injecting the Synchro-Cyclotron extracted proton beam into a strong focussing ring called CYBEST, is investigated. It is seen that pion beams produced in internal targets of such a device show some advantages with respect to present Synchro-Cyclotron beams. More detailed studies are needed however for final judgement. CYBEST is realizable if a sufficiently fast extraction from the Synchro-Cyclotron could be obtained. The magnetic structure is simple but occupies a large area and the required aperture is also relatively large.