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Study of beamlets extracted from a multiaperture and five-stage acceleration system
https://repo.qst.go.jp/records/2000377
https://repo.qst.go.jp/records/20003774f1e5c69-c641-45e9-af2c-1eb1182c88c2
| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||||||||||||||
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| 公開日 | 2024-01-25 | |||||||||||||||||||
| タイトル | ||||||||||||||||||||
| タイトル | Study of beamlets extracted from a multiaperture and five-stage acceleration system | |||||||||||||||||||
| 言語 | en | |||||||||||||||||||
| 言語 | ||||||||||||||||||||
| 言語 | eng | |||||||||||||||||||
| 資源タイプ | ||||||||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||||||||
| 資源タイプ | journal article | |||||||||||||||||||
| 著者 |
Kashiwagi Mieko
× Kashiwagi Mieko
× Kisaki Masashi
× Kojima Atsushi
× Hiratsuka Junichi
× Ichikawa Masahiro
× Murayama Masamichi
× Tobari Hiroyuki
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| 抄録 | ||||||||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||||||||
| 内容記述 | A beam optics study using the ITER-relevant high intense negative ion beams, such as 1 MeV, 200 A/m2, has been performed experimentally and analytically using a multi-aperture and five-stage accelerator. Initially, multi-beamlets generated from this accelerator were deflected in various directions due to the magnetic field and space charge repulsion between beams and showed various divergences. These had limited the pulse length and the beam energy. Compensation methods of the beamlet deflections have worked effectively and contributed to achieving the ITER requirement, the divergence angle of <7 mrad, and the deflection angle of <1 mrad for 1 MeV beam. The beam pulse has been gradually extended from 1 to 100 s and is now going to a longer pulse based on these results. One of the remaining issues is to understand and suppress peripheral components of the beam, namely, the halo, and to reduce the local heat loads observed around the aperture edge. This halo component has been successfully distinguished from the beam core by using a newly developed beam emittance measurement system for high intense beams. By combining this measured beam emittance and the beam simulation, it was clarified for the first time that the halo components are generated in an area of 1 mm width from the aperture edge. |
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| 書誌情報 |
Review of Scientific Instruments 巻 93, 号 053301, p. 1-10, 発行日 2023-01 |
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| 出版者 | AIP Publishing | |||||||||||||||||||
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| 収録物識別子タイプ | ISSN | |||||||||||||||||||
| 収録物識別子 | 0034-6748 | |||||||||||||||||||
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| 識別子タイプ | DOI | |||||||||||||||||||
| 関連識別子 | 10.1063/5.0080804 | |||||||||||||||||||
