The compact electron cyclotron resonance ion source KeiGM for the carbon ion therapy facility at Gunma University

• Published in: Review of scientific instruments Vol. 81; no. 2; p. 02A327
• Main Authors: Muramatsu, M., Kitagawa, A., Drentje, A. G., Hojo, S., Ueda, T., Miyazaki, H., Yusa, K., Tashiro, M., Torikai, K., Sakama, M., Kanai, T., Yamada, S.
• Format: Journal Article
• Language: English
• Published: United States 01.02.2010
• Subjects: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Academic Medical Centers; Carbon; CARBON IONS; Cyclotrons; DESIGN; ECR ION SOURCES; Electrons; Gases - chemistry; HEAVY IONS; ION BEAMS; Japan; METHANE; Methane - chemistry; Microwaves; PARTICLE ACCELERATORS; RADIOLOGY AND NUCLEAR MEDICINE; RADIOTHERAPY; Radiotherapy - instrumentation; Radiotherapy - methods; Japan
• ISSN: 0034-6748; 1089-7623; 1089-7623
• DOI: 10.1063/1.3273055

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 C4+ using C2H2 gas (660 W and 40 kV). The beam intensity of C4+ was 600 e μA with CH4 gas (250 W and 30 kV). The beam intensity satisfies the required value of 300 e μA.