@article{oai:repo.qst.go.jp:00042873,
 author = {Muramatsu, Masayuki and Kitagawa, Atsushi and Satou, Yukio and Yamada, Satoru and Hattori, Toshiyuki and Hanagasaki, Mitsuru and Fukushima, Toshitaka and Ogawa, Hirotsugu and 村松 正幸 and 北川 敦志 and 佐藤 幸夫 and 山田 聰 and 服部 俊幸 and 小川 博嗣},
 issue = {2},
 journal = {Review of Scientific Instruments},
 month = {},
 note = {A compact ECR ion source has been developed for heavy-ion medical facilities. The beam intensity and stability were considerably improved by recent modifications on three points (length of sextupole, cooling system for the extraction electrode and position of Einzel lens). Initial results of C4+ beam tests show that an intensity of 180 emA can be routinely obtained with simple tuning. The best record was 220 emA for C4+, which meets the medical requirements. Throughout these tests, CH4 gas was used with 0.1 cc/min and the extraction voltage was fixed at 25 kV. Results on beam emittance and long-term stability are also briefly discussed.},
 pages = {573--575},
 title = {Development of an ECR ion source for carbon therapy},
 volume = {73},
 year = {2002}
}