Experimental Condition and Optimization for Coexistence of Fullerene and Iron Ions in ECRIS

Kato, Yushi; Tsuda, Yuichi; Watanabe, Toshikazu; Onishi, Kōji; Hamada, Kouta; Takeda, Takeshi; Omori, Takayuki; Okumura, Kazuki; Uchida, Takaya; Kitagawa, A.; Muramatsu, M.; Yoshida, Yoshikazu

doi:10.1109/iit.2018.8807955

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“…The Osaka University group introduced iron vapor using an induction heating (IH)-type iron evaporation source, and succeeded in experimentally finding the operating conditions of ECRIS in which the fullerene ion beam and the iron ion beam coexist. It has become possible to measure the charge-state distribution (CSD) of the beam current under the condition that both coexist [14]. Therefore, in the experiment from January to March 2020, the measurement of the CSD of the ion beam current in the same experiment led to the acquisition of experimental spectral data, suggesting the formation of iron-encapsulated fullerene.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, in order to cross-check the formation of iron-encapsulated fullerenes, the mass spectra corresponding to fullerenes, iron, and iron-encapsulated fullerenes were also found from the analysis results by TOFMA, etc. of the samples obtained with the toluene solvent of the deposits near the electrodes in the ECRIS [14]. At present, we are trying to acquire more accurate data while the continuous experiment is interrupted by the new coronavirus syndrome.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%