Producing Iron Endohedral Fullerene on Electron Cyclotron Resonance Ion Source
Yushi Kato,
Takayuki Omori,
Issei Owada,
Wataru Kubo,
Shuhei Harisaki,
Koichi Sato,
Kazuki Tsuda,
Takumu Maenaka,
Masahiro Anan,
Masayuki Muramatsu,
Atsushi Kitagawa,
Yoshikazu Yoshida
Affiliations
Yushi Kato
Division of Electrical, Electronic and Infocommunications Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita-shi, Osaka 565-0871, Japan
Takayuki Omori
Division of Electrical, Electronic and Infocommunications Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita-shi, Osaka 565-0871, Japan
Issei Owada
Division of Electrical, Electronic and Infocommunications Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita-shi, Osaka 565-0871, Japan
Wataru Kubo
Division of Electrical, Electronic and Infocommunications Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita-shi, Osaka 565-0871, Japan
Shuhei Harisaki
Division of Electrical, Electronic and Infocommunications Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita-shi, Osaka 565-0871, Japan
Koichi Sato
Division of Electrical, Electronic and Infocommunications Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita-shi, Osaka 565-0871, Japan
Kazuki Tsuda
Division of Electrical, Electronic and Infocommunications Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita-shi, Osaka 565-0871, Japan
Takumu Maenaka
Division of Electrical, Electronic and Infocommunications Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita-shi, Osaka 565-0871, Japan
Masahiro Anan
Division of Electrical, Electronic and Infocommunications Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamada-oka, Suita-shi, Osaka 565-0871, Japan
Masayuki Muramatsu
National Institute of Radiological Science (NIRS), National Institutes of Quantum and Radiological Science and Technology (QST), 4-9-1, Anagawa, Inage-ku, Chiba 263-8555, Japan
Atsushi Kitagawa
National Institute of Radiological Science (NIRS), National Institutes of Quantum and Radiological Science and Technology (QST), 4-9-1, Anagawa, Inage-ku, Chiba 263-8555, Japan
Yoshikazu Yoshida
Faculty of Science and Engineering, Toyo University, 2100, Kugirai, Kawagoe-shi 350-8585, Japan
An electron cyclotron resonance (ECR) ion source (ECRIS) can generate an available amount of multicharged ions, thus it is not limited for use in the field of accelerator science, but also in medical/biological fields, such as for heavy ion beam cancer treatment and ion engines. The processes of generating multicharged ions are mainly sequential collisions of a direct ionization process by electrons, and have good ion confinement characteristics. By utilizing this confinement property, we have synthesized iron-encapsulated fullerenes, which are supramolecular and can be expected to have various high functions. Fullerenes and iron ions are vaporized from pure solid materials and introduced into the ECRIS together with the support gas. We investigated conditions under which fullerene ions do not dissociate and iron ions are generated so that both can coexist. Generated ions are extracted from the ECRIS and separated by mass/charge with a dipole magnet, and detected with a Faraday cup. This measurement system is characterized by a wide dynamic range. The charge-state distribution (CSD) of ion currents was measured to investigate the optimum conditions for supramolecular synthesis. As a result, a significant spectrum suggesting the possibility of iron-encapsulated fullerenes was obtained. This paper describes the details of these experimental results.
