title: Plasma spectroscopy of metal ions for hyper-electron cyclotron resonance ion source.
abstract: In this research, the optical line spectra of metal ions from ECR plasma were observed using a grating monochromator with a photomultiplier. The light intensity of line spectrum from the ECR plasma had a strong correlation with ion beam intensity measured by a magnetic mass analyzer. This correlation is a significant information for the beam tuning process, because it allows to conduct the extraction of the desired metal ion species from the ECR plasma. Separation of ion species of the same charge to mass ratio with an electromagnetic mass analyzer is known to be an exceptionally complex process, but this research provides a new approach for its simplification. In this paper the grating monochromator method for metal ion beam tuning such as (40)Ca(12+), (56)Fe(15+), and (85)Rb(20+) of hyper-ECR ion source as an injector for RIKEN Azimuthal Varying Field cyclotron is described.
authors.affiliation: Center of General Education, Tokyo University of Science, Suwa, 5000-1 Toyohira, Chino Nagano 391-0292, Japan.
authors.forename: Hideshi
authors.initials: H
authors.lastname: Muto
authors.affiliation: Center for Nuclear Study, University of Tokyo, 2-1 Hirosawa, Riken Campus, Wako Saitama 351-0198, Japan.
authors.forename: Yukimitsu
authors.initials: Y
authors.lastname: Ohshiro
authors.affiliation: Center for Nuclear Study, University of Tokyo, 2-1 Hirosawa, Riken Campus, Wako Saitama 351-0198, Japan.
authors.forename: Shoichi
authors.initials: S
authors.lastname: Yamaka
authors.affiliation: Center for Nuclear Study, University of Tokyo, 2-1 Hirosawa, Riken Campus, Wako Saitama 351-0198, Japan.
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Watanabe
authors.affiliation: Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization, Oho, Tsukuba, Ibaraki, Japan.
authors.forename: Michihiro
authors.initials: M
authors.lastname: Oyaizu
authors.affiliation: Center for Nuclear Study, University of Tokyo, 2-1 Hirosawa, Riken Campus, Wako Saitama 351-0198, Japan.
authors.forename: Shigeru
authors.initials: S
authors.lastname: Kubono
authors.affiliation: Center for Nuclear Study, University of Tokyo, 2-1 Hirosawa, Riken Campus, Wako Saitama 351-0198, Japan.
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Yamaguchi
authors.affiliation: RIKEN Nishina Center for Accelerator-Based Science, Wako Saitama 351-0198, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Kase
authors.affiliation: Heavy Ion Cancer Therapy Center, National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage Chiba 263-855, Japan.
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Hattori
authors.affiliation: Center for Nuclear Study, University of Tokyo, 2-1 Hirosawa, Riken Campus, Wako Saitama 351-0198, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Shimoura
mesh_terms: D017357:Cyclotrons / Q000295:instrumentation*; D004583:Electrons; D008670:Metals / Q000737:chemistry*; D010100:Oxygen; D058626:Plasma Gases; D013057:Spectrum Analysis / Q000295:instrumentation*
chemical_list: D008670:Metals; D058626:Plasma Gases; D010100:Oxygen