title: Grating monochromator for electron cyclotron resonance ion source operation.
abstract: Recently, we started to observe optical line spectra from an ECR plasma 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 beam tuning because it allows the extraction of the desired 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 gives new insights into its simplification. In this paper, the grating monochromator method for beam tuning of a Hyper-ECR ion source as an injector for RIKEN azimuthal varying field (AVF) 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.forename: Yukimitsu
authors.initials: Y
authors.lastname: Ohshiro
authors.forename: Shouichi
authors.initials: S
authors.lastname: Yamaka
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Watanabe
authors.forename: Michihiro
authors.initials: M
authors.lastname: Oyaizu
authors.forename: Shigeru
authors.initials: S
authors.lastname: Kubono
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Yamaguchi
authors.forename: Masayuki
authors.initials: M
authors.lastname: Kase
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Hattori
authors.forename: Susumu
authors.initials: S
authors.lastname: Shimoura
mesh_terms: D017357:Cyclotrons; D004583:Electrons; D008027:Light; D055096:Optical Devices