title: Effect of axial magnetic field on a 2.45 GHz permanent magnet ECR ion source.
abstract: Herein, we conduct a fundamental study to improve the generation efficiency of a multi-charged ion source using argon. A magnetic field of our electron cyclotron resonance ion source is composed of a permanent magnet and a solenoid coil. Thereby, the axial magnetic field in the chamber can be tuned. Using the solenoid coil, we varied the magnetic field strength in the plasma chamber and measured the ion beam current extracted at the electrode. We observed an approximately three times increase in the Ar(4+) ion beam current when the magnetic field on the extractor-electrode side of the chamber was weakened. From our results, we can confirm that the multi-charged ion beam current changes depending on magnetic field intensity in the plasma chamber.
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: H
authors.initials: H
authors.lastname: Wada
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: M
authors.initials: M
authors.lastname: Furuse