title: Measurement of ion species in high current ECR H⁺/D⁺ ion source for IFMIF (International Fusion Materials Irradiation Facility).
abstract: Ion species ratio of high current positive hydrogen/deuterium ion beams extracted from an electron-cyclotron-resonance ion source for International Fusion Materials Irradiation Facility accelerator was measured by the Doppler shift Balmer-α line spectroscopy. The proton (H(+)) ratio at the middle of the low energy beam transport reached 80% at the hydrogen ion beam extraction of 100 keV/160 mA and the deuteron (D(+)) ratio reached 75% at the deuterium ion beam extraction of 100 keV/113 mA. It is found that the H(+) ratio measured by the spectroscopy gives lower than that derived from the phase-space diagram measured by an Allison scanner type emittance monitor. The H(+)/D(+) ratio estimated by the emittance monitor was more than 90% at those extraction currents.
authors.affiliation: Rokkasho Fusion Institute, Japan Atomic Energy Agency, Rokkasho, Aomori 039-3212, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Shinto
authors.affiliation: Commissariat à l'Energie Atomique et aux Energies Alternatives, CEA/Saclay, DSM/IRFU, 91191 Gif/Yvette, France.
authors.forename: F
authors.initials: F
authors.lastname: Senée
authors.affiliation: IFMIF/EVEDA Project Team, Rokkasho, Aomori 039-3212, Japan.
authors.forename: J-M
authors.initials: JM
authors.lastname: Ayala
authors.affiliation: Commissariat à l'Energie Atomique et aux Energies Alternatives, CEA/Saclay, DSM/IRFU, 91191 Gif/Yvette, France.
authors.forename: B
authors.initials: B
authors.lastname: Bolzon
authors.affiliation: Commissariat à l'Energie Atomique et aux Energies Alternatives, CEA/Saclay, DSM/IRFU, 91191 Gif/Yvette, France.
authors.forename: N
authors.initials: N
authors.lastname: Chauvin
authors.affiliation: Commissariat à l'Energie Atomique et aux Energies Alternatives, CEA/Saclay, DSM/IRFU, 91191 Gif/Yvette, France.
authors.forename: R
authors.initials: R
authors.lastname: Gobin
authors.affiliation: Rokkasho Fusion Institute, Japan Atomic Energy Agency, Rokkasho, Aomori 039-3212, Japan.
authors.forename: R
authors.initials: R
authors.lastname: Ichimiya
authors.affiliation: Rokkasho Fusion Institute, Japan Atomic Energy Agency, Rokkasho, Aomori 039-3212, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Ihara
authors.affiliation: Rokkasho Fusion Institute, Japan Atomic Energy Agency, Rokkasho, Aomori 039-3212, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Ikeda
authors.affiliation: Rokkasho Fusion Institute, Japan Atomic Energy Agency, Rokkasho, Aomori 039-3212, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Kasugai
authors.affiliation: Rokkasho Fusion Institute, Japan Atomic Energy Agency, Rokkasho, Aomori 039-3212, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kitano
authors.affiliation: Rokkasho Fusion Institute, Japan Atomic Energy Agency, Rokkasho, Aomori 039-3212, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kondo
authors.affiliation: IFMIF/EVEDA Project Team, Rokkasho, Aomori 039-3212, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Marqueta
authors.affiliation: IFMIF/EVEDA Project Team, Rokkasho, Aomori 039-3212, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Okumura
authors.affiliation: Rokkasho Fusion Institute, Japan Atomic Energy Agency, Rokkasho, Aomori 039-3212, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Takahashi
authors.affiliation: Commissariat à l'Energie Atomique et aux Energies Alternatives, CEA/Saclay, DSM/IRFU, 91191 Gif/Yvette, France.
authors.forename: M
authors.initials: M
authors.lastname: Valette