Status of the Bio-Nano electron cyclotron resonance ion source at Toyo University

Uchida, Takashi; Minezaki, H.; Ishihara, S.; Muramatsu, M.; Rácz, R.; Asaji, Toyohisa; Kitagawa, A.; Kato, Yushi; Biri, S.; Drentje, A.G.; Yoshida, Yoshikazu

doi:10.1063/1.4862212

Cited by 8 publications

(2 citation statements)

References 13 publications

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“…[3,4] Various past techniques such as laser vaporization, arc discharge, and ion implantation have been used to produce endohedral fullerenes. [5][6][7][8] We aim to synthesize Fe@C60 by collisions in the plasma gas phase. We have achieved an ECR plasma in which iron and fullerene ions coexist.…”

Section: Introductionmentioning

confidence: 99%

Low-voltage extraction characteristics of ion beams and space potential measurements on ECRIS

Owada

Kubo

Harisaki

et al. 2022

J. Phys.: Conf. Ser.

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We have been using an electron cyclotron resonance ion source (ECRIS) for ion beam production, and it is desirable to construct a universal ECRIS that can produce ions with a wide range of mass/charge ratios, e.g. from several to several thousand. We investigated the characteristics of ions with high mass/charge ratios, e.g., iron endohedral fullerenes production, which requires low voltage beam extraction. We investigated the characteristics of the ion beam extraction at low extraction voltage. It is found that the beam current almost obeyed the Child-Langmuir law for various ion species. The space potential of the plasma in the ion source can be obtained from the relation between the extraction voltage and the square of the magnetic field strength of the dipole magnet. It is found that space potential values are larger with large charge state of ions, in low gas pressure condition and in high microwave incident power. At the same time, the plasma space potential was measured by using a Langmuir probe and compared with the ion beam method. It is found that same trend is confirmed with probe method.

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Section: Introductionmentioning

confidence: 99%

Low-voltage extraction characteristics of ion beams and space potential measurements on ECRIS

Owada

Kubo

Harisaki

et al. 2022

J. Phys.: Conf. Ser.

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“…Toyo University, NIRS, Hungary JAERI(ATOMK), and Osaka University groups started joint research on the establishment of a new bio-nano ECRIS at Toyo University, and in the 2010s, encapsulation experiments inside fullerenes were conducted by the ion implantation method and by using a grid inside the ECRIS [8,9].…”

Section: Introductionmentioning

confidence: 99%

Producing Iron Endohedral Fullerene on Electron Cyclotron Resonance Ion Source

et al. 2021

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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.

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Producing multicharged fullerene ion beam extracted from the second stage of tandem-type ECRIS

Nagaya

Nishiokada

Hagino

et al. 2015

Review of Scientific Instruments

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We have been constructing the tandem-type electron cyclotron resonance ion source (ECRIS). Two ion sources of the tandem-type ECRIS are possible to generate plasma individually, and they also confined individual ion species by each different plasma parameter. Hence, it is considered to be suitable for new materials production. As the first step, we try to produce and extract multicharged C60 ions by supplying pure C60 vapor in the second stage plasma because our main target is producing the endohedral fullerenes. We developed a new evaporator to supply fullerene vapor, and we succeeded in observation about multicharged C60 ion beam in tandem-type ECRIS for the first time.

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Status of the Bio-Nano electron cyclotron resonance ion source at Toyo University

Cited by 8 publications

References 13 publications

Low-voltage extraction characteristics of ion beams and space potential measurements on ECRIS

Low-voltage extraction characteristics of ion beams and space potential measurements on ECRIS

Producing Iron Endohedral Fullerene on Electron Cyclotron Resonance Ion Source

Producing multicharged fullerene ion beam extracted from the second stage of tandem-type ECRIS

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