Verification of role of neoclassical poloidal viscosity on transition to improved confinement mode in toroidal plasma
| Project/Area Number |
23760812
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Nuclear fusion studies
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
TAKAHASHI Hiromi 核融合科学研究所, ヘリカル研究部, 助教 (00462193)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Keywords | 新古典ポロイダル粘性 / 径電場 / ポロイダル回転 / 電極バイアス / 閉じ込め改善 / トロイダルプラズマ / ポロイダル粘性 / プラズマ回転 / LHD / ヘリカル / 新古典イオン粘性 / 大型ヘリカル装置 / Heliotron J / イオン粘性 |
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| Research Abstract |
The electrode biasing experiments were carried out in various magnetic configurations in the Large Helical Device (LHD) and the Heliotron J. The neoclassical poloidal viscosity was evaluated from the theory and the experiments. Especially in the LHD, the neoclassical poloidal viscosity was calculated using FORTEC-3D code, which includes the finite Larmor radius effect. The simulation enabled us to calculate the neoclassical poloidal viscosity with high accuracy. Both the experimental and theoretical viscosities obtained in the LHD and the Heliotron J were compared with those previously evaluated in TU-Heliac and the CHS. Consequently the experimental results show good agreement with the theoretical prediction. In addition to those results, we unexpectedly observed the burst like transition under the marginal biasing condition in the Heliotron J, which is new interesting physical phenomenon.
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Report
(4 results)
Research Products
(48 results)
