Isochronous Cyclotron Harmonic Beam Experiments

We have previously described a system for boosting the energy of heavy ions in isochronous cyclotrons by recycling. This system requires simultaneous acceleration of two beams on different harmonics, all-magnetic extraction, external separation, and reinjection of the lower energy beam. The first three requirements have now been demonstrated on a limited scale using simultaneous beams from an internal ion source, and without building a reinjection system. A 6Lil+ beam on the third harmonic at an energy of 4 MeV and a 6Li3+ beam on the fundamental at an energy of 36 MeV were simultaneously accelerated on the Oak Ridge Isochronous Cyclotron (ORIC), extracted and separated, demonstrating the major principles of recycle without closing the loop.