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Aihara, Haruka; Watanabe, So; Shibata, Atsuhiro; Mahardiani, L.*; Otomo, Ryoichi*; Kamiya, Yuichi*
Progress in Nuclear Energy, 139, p.103872_1 - 103872_9, 2021/09
Times Cited Count：2 Percentile：30.55(Nuclear Science & Technology)Watanabe, So; Ogi, Hiromichi*; Arai, Yoichi; Aihara, Haruka; Takahatake, Yoko; Shibata, Atsuhiro; Nomura, Kazunori; Kamiya, Yuichi*; Asanuma, Noriko*; Matsuura, Haruaki*; et al.
Progress in Nuclear Energy, 117, p.103090_1 - 103090_8, 2019/11
Times Cited Count：12 Percentile：79.53(Nuclear Science & Technology)
baking method for degassing of a kicker magnet in accelerator beam lineKamiya, Junichiro; Ogiwara, Norio; Yanagibashi, Toru*; Kinsho, Michikazu; Yasuda, Yuichi*
Journal of Vacuum Science and Technology A, 34(2), p.021604_1 - 021604_10, 2016/03
Times Cited Count：3 Percentile：14.8(Materials Science, Coatings & Films)In this study, we propose a new 
degassing method by which only kicker magnets in the accelerator beam line are baked out without raising the temperature of the vacuum chamber to prevent unwanted heat expansion of the chamber. The bake-out system comprises the heater and thermal radiation shield plates, which are installed between the kicker magnet and the chamber wall. The result of the verification test showed that each part of the kicker magnet was heated to above the target temperature with a small rise in the vacuum chamber temperature. A graphite heater was selected in this application to bake-out the kicker magnet in the beam line to ensure reliability and easy maintainability of the heater. The vacuum characteristics of graphite were suitable for heater operation in the beam line. A preliminary heat-up test conducted in the accelerator beam line also showed that each part of the kicker magnet was successfully heated and that heat expansion of the chamber was negligibly small.
Yokota, Wataru; Sato, Takahiro; Kamiya, Tomihiro; Okumura, Susumu; Kurashima, Satoshi; Miyawaki, Nobumasa; Kashiwagi, Hirotsugu; Yoshida, Kenichi; Funayama, Tomoo; Sakashita, Tetsuya; et al.
JAEA-Technology 2014-018, 103 Pages, 2014/09
JAEA-Technology-2014-018.pdf:123.66MB
The world's first microbeam focusing technology for heavy ions of hundreds MeV accelerated by a cyclotron has been developed at the TIARA facility in the Takasaki Advanced Radiation Research Institute of the Japan Atomic Energy Agency. The technology enables us to form a microbeam of less than 1 
m in diameter and to shoot a specified point on a target by one ion (single-ion hit) with spatial accuracy of microbeam size. In the course of the development, a cyclotron technology to accelerate a small energy-spread beam of hundres MeV, which is necessary for focusing to 1 m, has been developed as well as a beam focusing apparatus, beam size measurement and so forth based on the several-MeV microbeam/single-ion hit system of the TIARA electrostatic accelerators. Applicability of the technologies was examined by actual use in irradiation experiment and the result were fed back to them. This paper reports the process and the results of the development over ten years.
Funayama, Tomoo; Sakashita, Tetsuya; Oikawa, Masakazu*; Sato, Takahiro; Yokota, Yuichiro; Wada, Seiichi*; Kamiya, Tomihiro; Yokota, Wataru; Kobayashi, Yasuhiko
no journal, ,
We installed new focusing microbeam system at a vertical beam line of AVF cyclotron of TIARA, JAEA. New system is equipped with a quadruplet quadrupole lens system for higher spatial resolution and with an X, Y beam scanner for fast hitting of single ion to micron scaled samples like a biological cell. In vacuum, a microbeam generated by the system had spatial resolution of less than 1 m. The beam was extracted into the atmosphere, and its spatial distribution of ion was observed by irradiating ion track detector, CR39, at just beneath a vacuum window made by Kapton film of 8 m thick. The spatial resolution of beam extracted in air was less than 5 m, indicating that finer microbeam was generated by new focusing microbeam system. New cell targeting system for this microbeam system, which is designed to target and irradiate biological materials more precisely, is currently under development.
Funayama, Tomoo; Sakashita, Tetsuya; Sato, Takahiro; Fukamoto, Kana; Kurashima, Satoshi; Yokota, Yuichiro; Yokota, Wataru; Kamiya, Tomihiro; Kobayashi, Yasuhiko
no journal, ,
We had developed the heavy-ion microbeam system at TIARA of the Japan Atomic Energy Agency, and utilized for analyzing heavy-ion induced biological effects. Additionally, we have started developing another new focusing microbeam system for carrying out the experiments that cannot be archived by existing collimating microbeam system. The new system can provide finer microbeam by focusing heavy-ion beam from AVF cyclotron using a quadruplet quadrupole lens system. We are now developing a method for irradiating specific region of target sample using the cell targeting station installed last year. The collimating microbeam system was also improved for allowing a novel irradiation means that make a good use of its high fluence characteristics. For that purpose, the cell targeting system of collimating microbeam system was newly designed and updated.
Sakashita, Tetsuya; Funayama, Tomoo; Sato, Takahiro; Hamada, Nobuyuki*; Fukamoto, Kana; Yokota, Yuichiro; Suzuki, Michiyo; Yokota, Wataru; Kamiya, Tomihiro; Kobayashi, Yasuhiko
no journal, ,
The heavy-ion collimating microbeam system has been developed at JAEA for the radio-surgery technique and radiation biology. Using this system, we can irradiate an exact number of heavy ions at the targeted cell. We show applications of various types of organisms, for example, mammalian cultured cells, a silkworm, a plant and a nematode.
Aihara, Haruka; Watanabe, So; Nomura, Kazunori; Kamiya, Yuichi*
no journal, ,
no abstracts in English
Aihara, Haruka; Watanabe, So; Nomura, Kazunori; Kamiya, Yuichi*
no journal, ,
Watanabe, So; Ogi, Hiromichi*; Arai, Yoichi; Aihara, Haruka; Shibata, Atsuhiro; Nomura, Kazunori; Kamiya, Yuichi*; Asanuma, Noriko*; Matsuura, Haruaki*; Kubota, Toshio*; et al.
no journal, ,
Aihara, Haruka; Watanabe, So; Shibata, Atsuhiro; Kamiya, Yuichi*
no journal, ,
-HCO
H reaction with porous carbon catalyst for purification of wastewater containing high concentration nitric acidWei, J.*; Yamada, Chinami*; Aihara, Haruka; Watanabe, So; Otomo, Ryoichi*; Kamiya, Yuichi*
no journal, ,
no abstracts in English
