title: Development of a compact ECR ion source for various ion production.
abstract: There is a desire that a carbon-ion radiotherapy facility will produce various ion species for fundamental research. Although the present Kei2-type ion sources are dedicated for the carbon-ion production, a future ion source is expected that could provide: (1) carbon-ion production for medical use, (2) various ions with a charge-to-mass ratio of 1/3 for the existing Linac injector, and (3) low cost for modification. A prototype compact electron cyclotron resonance (ECR) ion source, named Kei3, based on the Kei series has been developed to correspond to the Kei2 type and to produce these various ions at the National Institute of Radiological Sciences (NIRS). The Kei3 has an outer diameter of 280 mm and a length of 1120 mm. The magnetic field is formed by the same permanent magnet as Kei2. The movable extraction electrode has been installed in order to optimize the beam extraction with various current densities. The gas-injection side of the vacuum chamber has enough space for an oven system. We measured dependence of microwave frequency, extraction voltage, and puller position. Charge state distributions of helium, carbon, nitrogen, oxygen, and neon were also measured.
authors.affiliation: National Institute of Radiological Sciences (NIRS), 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Muramatsu
authors.affiliation: National Institute of Radiological Sciences (NIRS), 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Hojo
authors.affiliation: National Institute of Radiological Sciences (NIRS), 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Iwata
authors.affiliation: National Institute of Radiological Sciences (NIRS), 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Katagiri
authors.affiliation: National Institute of Radiological Sciences (NIRS), 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Sakamoto
authors.affiliation: Sumitomo Heavy Industries, Ltd., 19 Natsushima, Yokosuka, Kanagawa 237-8555, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Takahashi
authors.affiliation: Accelerator Engineering Corporation, 3-8-5 Konakadai, Inage, Chiba 263-0043, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Sasaki
authors.affiliation: Accelerator Engineering Corporation, 3-8-5 Konakadai, Inage, Chiba 263-0043, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Fukushima
authors.affiliation: Accelerator Engineering Corporation, 3-8-5 Konakadai, Inage, Chiba 263-0043, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Takahashi
authors.affiliation: Accelerator Engineering Corporation, 3-8-5 Konakadai, Inage, Chiba 263-0043, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Suzuki
authors.affiliation: Accelerator Engineering Corporation, 3-8-5 Konakadai, Inage, Chiba 263-0043, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Sasano
authors.affiliation: Bio-Nano Electronics Research Centre, Toyo University, 2100 Kujirai, Kawagoe-shi, Saitama 350-8585, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Uchida
authors.affiliation: Bio-Nano Electronics Research Centre, Toyo University, 2100 Kujirai, Kawagoe-shi, Saitama 350-8585, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Yoshida
authors.affiliation: Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita-shi, Osaka 565-0871, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Hagino
authors.affiliation: Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita-shi, Osaka 565-0871, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Nishiokada
authors.affiliation: Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita-shi, Osaka 565-0871, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kato
authors.affiliation: National Institute of Radiological Sciences (NIRS), 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Kitagawa
mesh_terms: D002244:Carbon; D007477:Ions; D060526:Magnetic Fields; D011878:Radiotherapy / Q000295:instrumentation* / Q000379:methods*
chemical_list: D007477:Ions; D002244:Carbon