| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2023-06-28 |
| タイトル |
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タイトル |
Indirect energy transfer channel between fast ions via nuclear elastic scattering observed on the large helical device |
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言語 |
en |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
H. Matsuura
K. Kimura
D. Umezaki
K. Ogawa
M. Isobe
Y. Kawamoto
T. Oishi
M. Goto
N. Tamura
M. Osakabe
T. Nishitani
Sugiyama Shota
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
An energy transfer phenomenon between energetic ions, which cannot be explained only considering the Coulomb scattering process, was observed on a large helical device (LHD). This phenomenon often occurs in fusion reactivity enhancement and fast-ion slowing-down process that can be observed as a delay in the decay time of the D(d,n)3He neutron generation rate. The transferred energy required to induce such a reactivity enhancement or delay in the fast-ion slowing-down time (neutron decay time) was examined based on the Boltzmann-Fokker-Planck analysis in which a discrete energy transfer process, called nuclear elastic scattering (NES), is included. It was shown that even though the cross section of the NES is smaller than that of the Coulomb scattering, enough knock-on population appears in the energetic region in ion distribution function to induce the observable NES effects; thus, enough energy is transferred from beam ions to fast component of bulk ion distribution function indirectly and the transferred energy per unit time via NES is comparable to the Coulomb scattering rate. This study analytically demonstrates that the observed phenomena on LHD can be explained smoothly by considering the alternative indirect energy transfer channel between energetic ions, which can be comparable with the one via Coulomb scattering. |
| 書誌情報 |
Physics of Plasmas
巻 29,
号 9,
p. 092502,
発行日 2022-09
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| 出版者 |
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出版者 |
AIP Publishing |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1070-664X |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1063/5.0097720 |
