title: The compact electron cyclotron resonance ion source KeiGM for the carbon ion therapy facility at Gunma University.
abstract: A high-energy carbon-ion radiotherapy facility is under construction at Gunma University Heavy Ion Medical Centre (GHMC). Its design was based on a study of the heavy ion radiotherapy at the National Institute of Radiological Sciences (NIRS) in order to reduce the size and construction cost of the facility. A compact electron cyclotron resonance ion source (ECRIS) for Gunma University, called KeiGM, was installed in 2008. It is almost a copy of the prototype ECRIS Kei2 which was developed by NIRS; meanwhile this prototype produced over 1 e mA of C(4+) using C(2)H(2) gas (660 W and 40 kV). The beam intensity of C(4+) was 600 e microA with CH(4) gas (250 W and 30 kV). The beam intensity satisfies the required value of 300 e microA.
authors.affiliation: National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, Chiba 263-8555, Japan. m_mura@nirs.go.jp
authors.forename: M
authors.initials: M
authors.lastname: Muramatsu
authors.forename: A
authors.initials: A
authors.lastname: Kitagawa
authors.forename: A G
authors.initials: AG
authors.lastname: Drentje
authors.forename: S
authors.initials: S
authors.lastname: Hojo
authors.forename: T
authors.initials: T
authors.lastname: Ueda
authors.forename: H
authors.initials: H
authors.lastname: Miyazaki
authors.forename: K
authors.initials: K
authors.lastname: Yusa
authors.forename: M
authors.initials: M
authors.lastname: Tashiro
authors.forename: K
authors.initials: K
authors.lastname: Torikai
authors.forename: M
authors.initials: M
authors.lastname: Sakama
authors.forename: T
authors.initials: T
authors.lastname: Kanai
authors.forename: S
authors.initials: S
authors.lastname: Yamada
mesh_terms: D000046:Academic Medical Centers; D002244:Carbon; D017357:Cyclotrons; D004583:Electrons; D005740:Gases / Q000737:chemistry; D007564:Japan; D008697:Methane / Q000737:chemistry; D008872:Microwaves; D011878:Radiotherapy / Q000295:instrumentation* / Q000379:methods
chemical_list: D005740:Gases; D002244:Carbon; D008697:Methane