An ECR ion source of Gunma University Heavy Ion Medical Center, so-called KeiGM [M. Muramatsu, A. Kitagawa, Y. Sakamoto, S. Sato, Y. Sato, H. Ogawa, S. Yamada, H. Ogawa, Y. Yoshida, and A. G. Drentje, Rev. Sci. Instrum. 76, 113304 (2005)], has been operated for cancer therapy and physical/biological experiment since 2010. KeiGM produces typically 230 μA of 10 keV/u C4+ ions from CH4 gases. The vacuum pressure is kept between 1.2 × 10−4 and 1.7 × 10−4 Pa so as to suppress the pulse-to-pulse current fluctuation within ±10%. The extraction electrode is cleaned every 6–8 months in order to remove deposited carbon, which increases the leak current and discharge. In order to investigate the possibility of long-term operation without such maintenances, oxygen aging for the cleaning of the extraction electrode has been tested in the test bench. The same-designed ion sources at National Institute of Radiological Sciences and SAGA Heavy Ion Medical Accelerator in Tosu (SAGA-HIMAT) are also operated with stable C4+ current, which are suitable for the continuous operation for cancer therapy.
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February 2014
14th International Conference on Ion Sources (ICIS 2011)
12-16 September 2011
Giardini-Naxos, Sicily (Italy)
Research Article|
December 11 2013
Operation status of the electron cyclotron resonance ion source at Gunma Universitya) Available to Purchase
H. Souda;
H. Souda
b)
1
Gunma University Heavy Ion Medical Center
, Maebashi, Gunma 371-0044, Japan
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S. Yamada;
S. Yamada
1
Gunma University Heavy Ion Medical Center
, Maebashi, Gunma 371-0044, Japan
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T. Kanai;
T. Kanai
1
Gunma University Heavy Ion Medical Center
, Maebashi, Gunma 371-0044, Japan
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E. Takeshita;
E. Takeshita
2
Kanagawa Cancer Center
, Yokohama 241-8515, Japan
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M. Muramatsu;
M. Muramatsu
3
National Institute of Radiological Sciences
, Chiba 263-8555, Japan
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A. Kitagawa;
A. Kitagawa
3
National Institute of Radiological Sciences
, Chiba 263-8555, Japan
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M. Kanazawa;
M. Kanazawa
4
SAGA Heavy Ion Medical Accelerator in Tosu
, Tosu, Saga 841-0071, Japan
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H. Izumiya;
H. Izumiya
5Accelerator
Engineering Corporation
, Chiba 263-0043, Japan
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Y. Kano
Y. Kano
5Accelerator
Engineering Corporation
, Chiba 263-0043, Japan
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H. Souda
1,b)
S. Yamada
1
T. Kanai
1
E. Takeshita
2
M. Muramatsu
3
A. Kitagawa
3
M. Kanazawa
4
H. Izumiya
5
Y. Kano
5
1
Gunma University Heavy Ion Medical Center
, Maebashi, Gunma 371-0044, Japan
2
Kanagawa Cancer Center
, Yokohama 241-8515, Japan
3
National Institute of Radiological Sciences
, Chiba 263-8555, Japan
4
SAGA Heavy Ion Medical Accelerator in Tosu
, Tosu, Saga 841-0071, Japan
5Accelerator
Engineering Corporation
, Chiba 263-0043, Japan
a)
Contributed paper, published as part of the Proceedings of the 15th International Conference on Ion Sources, Chiba, Japan, September 2013.
Rev. Sci. Instrum. 85, 02A934 (2014)
Article history
Received:
September 08 2013
Accepted:
October 20 2013
Citation
H. Souda, S. Yamada, T. Kanai, E. Takeshita, M. Muramatsu, A. Kitagawa, M. Kanazawa, H. Izumiya, Y. Kano; Operation status of the electron cyclotron resonance ion source at Gunma University. Rev. Sci. Instrum. 1 February 2014; 85 (2): 02A934. https://doi.org/10.1063/1.4833922
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