Development of Specially Designed Small Doublet for Compact Cyclotron Beam Injection

摘要

A number of compact cyclotrons accelerating ${rm H}^{-}$ ions to energies between 10 MeV and 100 MeV have recently been constructed for research and medical diagnostics/therapy in several countries. However limitations in extracted beam intensity are brought up by inadequate injection efficiency from the ion source into the machine.