title: Status of a compact electron cyclotron resonance ion source for National Institute of Radiological Sciences-930 cyclotron.
abstract: The Kei-source is a compact electron cyclotron resonance ion source using only permanent magnets and a frequency of 10 GHz. It was developed at the National Institute of Radiological Sciences (NIRS) for producing C(4+) ions oriented for high-energy carbon therapy. It has also been used as an ion source for the NIRS-930 cyclotron. Its microwave band region for the traveling-wave-tube amplifier and maximum output power are 8-10 GHz and 350 W, respectively. Since 2006, it has provided various ion beams such as proton, deuteron, carbon, oxygen, and neon with sufficient intensity (200 μA for proton and deuteron, 50 μA for C(4+), for example) and good stability for radioisotope production, tests of radiation damage, and basic research experiments. Its horizontal and vertical emittances were measured using a screen monitor and waist-scan. The present paper reports the current status of the Kei-source.
authors.affiliation: National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Hojo
authors.affiliation: National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Katagiri
authors.affiliation: National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Nakao
authors.affiliation: National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Sugiura
authors.affiliation: National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Muramatsu
authors.affiliation: National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Noda
authors.affiliation: Accelerator Engineering Corporation, 6-18-1 Konakadai, Inage, Chiba, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Okada
authors.affiliation: Accelerator Engineering Corporation, 6-18-1 Konakadai, Inage, Chiba, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Takahashi
authors.affiliation: Accelerator Engineering Corporation, 6-18-1 Konakadai, Inage, Chiba, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Komiyama
authors.affiliation: Accelerator Engineering Corporation, 6-18-1 Konakadai, Inage, Chiba, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Honma
authors.affiliation: National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Noda
mesh_terms: D017357:Cyclotrons / Q000295:instrumentation*; D004583:Electrons; D059346:Magnets; D057054:Molecular Imaging; D011871:Radiology / Q000295:instrumentation*