ECRIS2012 - List of Authors (Drentje, A.G.)

Paper

Title

Page

Design of a Compact ECR Ion Source for Various Ion Production

49

M. Muramatsu, S. Hojo, Y. Iwata, K. Katagiri, A. Kitagawa, Y. Sakamoto, S. Sato
NIRS, Chiba-shi, Japan
A.G. Drentje
KVI, Groningen, The Netherlands
T.F. Fujita
National Institute of Radiological Sciences, Chiba, Japan

Compact ECR ion source with all permanent magnets, so called Kei2, was developed for high energy carbon ion therapy facility at National Institute of Radiological Sciences. Kei2 source was design for production of only carbon ion for medical treatment. A copy of Kei2, so called KeiGM is used for Gunma University. Kei series are optimized for carbon ion production. In order to produce various ion beams for research, we design a new compact ECR ion source, so called Kei3. Kei3 is designed based on previous Kei series. In addition, there are three important points: 1) Movable beam extraction system for various extraction current densities, 2) An evaporator and MIVOC method for production of ions from solid materials and metal, and 3) Biased disk method and double frequency heating method for heavier ions. Same permanent magnets and microwave system will be used for easy maintenance and the cost effectiveness. Design of the Kei3 source will be described in this paper.

FRYA02

Status of ECR Ion Sources for Carbon-ion Radiotherapy in Japan

200

A. Kitagawa, M. Muramatsu
NIRS, Chiba-shi, Japan
A.G. Drentje
KVI, Groningen, The Netherlands
T.F. Fujita
National Institute of Radiological Sciences, Chiba, Japan
M. Kanazawa
SAGA HIMAT, Saga, Japan
N. Sasaki, W. Takasugi
AEC, Chiba, Japan
E. Takeshita, S. Yamada
Gunma University, Heavy-Ion Medical Research Center, Maebashi-Gunma, Japan

Heavy-ion radiotherapy is successfully carried out at the Heavy Ion Medical Accelerator in Chiba (HIMAC) at the National Institute of Radiological Sciences (NIRS) since 1994. Now three facilities are in operation and two are under construction in Japan. Over 8000 cancer patients have already been treated. 140-400 MeV/u carbon beams were selected for the first clinical trials at HIMAC because carbon is one of the best candidates which gives good localized biological dose distribution for the typical conditions, a depth of 10 - 25 cm and a thickness of several cm. Based on the clinical results, all the patients have been treated by carbon beams at present. The ion source needs to realize a stable carbon beam with the same conditions for daily operation. Since operators are usually not specialists of the ion source, the source should not require complicated manual tuning. In addition, shorter maintenance time and cycle are better for a hospital. ECR ion sources are utilized for such requirements in each facility. We report the recent status of the ECR ion sources at heavy-ion radiotherapy facilities in Japan.

Slides FRYA02 [5.652 MB]

Paper	Title	Page
TUPP04	Design of a Compact ECR Ion Source for Various Ion Production	49
	M. Muramatsu, S. Hojo, Y. Iwata, K. Katagiri, A. Kitagawa, Y. Sakamoto, S. Sato NIRS, Chiba-shi, Japan A.G. Drentje KVI, Groningen, The Netherlands T.F. Fujita National Institute of Radiological Sciences, Chiba, Japan
	Compact ECR ion source with all permanent magnets, so called Kei2, was developed for high energy carbon ion therapy facility at National Institute of Radiological Sciences. Kei2 source was design for production of only carbon ion for medical treatment. A copy of Kei2, so called KeiGM is used for Gunma University. Kei series are optimized for carbon ion production. In order to produce various ion beams for research, we design a new compact ECR ion source, so called Kei3. Kei3 is designed based on previous Kei series. In addition, there are three important points: 1) Movable beam extraction system for various extraction current densities, 2) An evaporator and MIVOC method for production of ions from solid materials and metal, and 3) Biased disk method and double frequency heating method for heavier ions. Same permanent magnets and microwave system will be used for easy maintenance and the cost effectiveness. Design of the Kei3 source will be described in this paper.

FRYA02	Status of ECR Ion Sources for Carbon-ion Radiotherapy in Japan	200
	A. Kitagawa, M. Muramatsu NIRS, Chiba-shi, Japan A.G. Drentje KVI, Groningen, The Netherlands T.F. Fujita National Institute of Radiological Sciences, Chiba, Japan M. Kanazawa SAGA HIMAT, Saga, Japan N. Sasaki, W. Takasugi AEC, Chiba, Japan E. Takeshita, S. Yamada Gunma University, Heavy-Ion Medical Research Center, Maebashi-Gunma, Japan
	Heavy-ion radiotherapy is successfully carried out at the Heavy Ion Medical Accelerator in Chiba (HIMAC) at the National Institute of Radiological Sciences (NIRS) since 1994. Now three facilities are in operation and two are under construction in Japan. Over 8000 cancer patients have already been treated. 140-400 MeV/u carbon beams were selected for the first clinical trials at HIMAC because carbon is one of the best candidates which gives good localized biological dose distribution for the typical conditions, a depth of 10 - 25 cm and a thickness of several cm. Based on the clinical results, all the patients have been treated by carbon beams at present. The ion source needs to realize a stable carbon beam with the same conditions for daily operation. Since operators are usually not specialists of the ion source, the source should not require complicated manual tuning. In addition, shorter maintenance time and cycle are better for a hospital. ECR ion sources are utilized for such requirements in each facility. We report the recent status of the ECR ion sources at heavy-ion radiotherapy facilities in Japan.
	Slides FRYA02 [5.652 MB]