Results of RIKEN superconducting electron cyclotron resonance ion source with 28 GHz. - Higurashi, Y.; Ohnishi, J.; Nakagawa, T.; Haba, H.; Tamura, M.; Aihara, T.; Fujimaki, M.; Komiyama, M.; Uchiyama, A.; Kamigaito, O. (Review of Scientific Instruments, 2012)