Invited Paper-Regenerative Beam Extraction

This work is a review of regenerative beam extraction for synchrocyclotrons and isochronous cyclotrons. The linear and nonlinear theories of the system for synchrocyclotrons are briefly reviewed. The problems for the extraction efficiency and external beam quality are discussed. A theory for isochronous cyclotrons is given. Finally, present operating features of the systems and future prospects are summarized.