title: First results of the 2.45 GHz Oshima electron cyclotron resonance ion source.
abstract: A new electron cyclotron resonance ion source has been constructed at Oshima College with a 2.45 GHz magnetron microwave source and permanent magnets employed as the main components. In addition, a solid-state power amplifier with a frequency range of 2.5-6.0 GHz was installed to study two-frequency plasma heating. Three solenoid coils were set up for adjusting the axial magnetic fields. Argon plasma generation and ion beam production have been conducted during the first year of operation. Ion current densities in the ECR plasma were measured using a biased disk. For 2.45 and 4.65 GHz two-frequency plasma heating, the ion density was approximately 1.5 times higher than that of 2.45 GHz single-frequency heating.
authors.affiliation: National Institute of Technology, Toyama College, 13 Hongo, Toyama 939-8630, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Asaji
authors.affiliation: National Institute of Technology, Oshima College, 1091-1 Komatsu, Suouoshima, Oshima, Yamaguchi 742-2193, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nakamura
authors.affiliation: National Institute of Technology, Oshima College, 1091-1 Komatsu, Suouoshima, Oshima, Yamaguchi 742-2193, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Furuse
authors.affiliation: Tateyama Machine Co., Ltd., 30 Shimonoban, Toyama 930-1305, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Hitobo
authors.affiliation: Graduate School of Engineering, Toyo University, 2100 Kujirai, Kawagoe, Saitama 350-8585, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Uchida
authors.affiliation: National Institute of Radiological Sciences (NIRS), 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Muramatsu
authors.affiliation: Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kato