2011 Fiscal Year Final Research Report
Correlation between Spatial Structure of Alfv6n Eigenmodes and Anoma lous Transport of Fast Ions
| Project/Area Number |
21340175
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Plasma science
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
ISOBE Mitsutaka 核融合科学研究所, ヘリカル研究部, 准教授 (00300731)
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| Co-Investigator(Kenkyū-buntansha) |
SHIMIZU Akihiro 核融合科学研究所, ヘリカル研究部, 助教 (00390633)
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| Project Period (FY) |
2009 – 2011
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| Keywords | LHD / アルヴェン固有モード / 高速イオン |
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| Research Abstract |
Effects of toroidicity-induced Alfven eigenmodes on energetic-ion transport have been investigated in LHD plasmas heated by high-energy neutral beam injection. TAE-induced fast-ion losses were observed. The losses increase as the TAE fluctuation amplitude increases. The dependence of the observed TAE-induced fast-ion loss with respect to TAE fluctuation amplitude indicates that outward shift of a magnetic axis increases the anomalous fast-ion loss caused by TAE. This is supposed to be due to increase of orbit shift from flux surfaces and expansion of spatial distribution of TAEs in outward shifted plasmas.
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Research Products
(20 results)
