KEKCB-18 GHz ECR charge breeder at TRIAC

The KEKCB is an electron cyclotron resonance ion source (ECRIS) operating at the microwave frequency of 18 GHz and has successfully operated as the charge breeder at Tokai Radioactive Ion Accelerator Complex (TRIAC). Following an overview of the TRIAC, the recent operating results of the KEKCB have been demonstrated. Special attention was paid on the element-dependent charge breeding efficiency and the beam impurity originating from the ECR plasma of the KEKCB.