Current status of plasma spectroscopic experiments with Hyper-ECR ion source at CNS, University of Tokyo

During operations of the Hyper-ECR ion source at the Center for Nuclear Study, University of Tokyo, an observation of plasma light intensities by a monochromator was made. Various gaseous and metal ions are produced, then extracted, and injected into RIKEN AVF cyclotron by the Hyper-ECR ion source. In this study, we developed the method of determining the crucible position, the magnetic strength distribution, and the RF power necessary for the plasma production. In summary, this study proves the importance of plasma spectroscopy for ion source operation.