CURRENT DEVELOPMENTS FOR INCREASING THE BEAM INTENSITIES OF THE RIKEN 18-GHz SUPERCONDUCTING ECR ION SOURCE

The RIKEN 18-GHz superconducting ECR ion source (18-GHz SC-ECRIS) and the RIKEN AVF cyclotron function as the light-ion injector at the RI Beam Factory (RIBF) as well as being used for low-energy nuclear physics experiments and additional RI production. We are currently trying to measure and improve the beam quality of the 18-GHz SCECRIS because the beam intensities are lower than those obtained from the other injector using the RIKEN Linear Accelerator (RILAC). In order to improve our understanding and to increase the beam intensities, we are developing the simulation of the low energy beam transportation and an online emittance meter based on the pepper-pot method. We have tested a prototype emittance meter and confirmed an analysis procedure to deduce the emittance from the measured data.