Verification of role of neoclassical poloidal viscosity on transition to improved confinement mode in toroidal plasma

验证新古典极向粘度对环形等离子体向改进约束模式过渡的作用

• 批准号: 23760812
• 负责人: TAKAHASHI Hiromi
• 金额: $ 2.66万
• 依托单位: National Institute for Fusion Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23760812/
• 关键词: 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

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.

在LHD和Heliotron J装置上进行了不同磁位形下的电极偏置实验，从理论和实验两方面对新经典极向粘度进行了估算。特别是在LHD中，新经典极向粘度的计算采用FORTEC-3D程序，其中包括有限Larmor半径效应。模拟结果使我们能够高精度地计算新经典极向粘滞系数。在LHD和Heliotron J中获得的实验和理论粘度与先前在TU-Heliac和CHS中评估的粘度进行了比较。因此，实验结果与理论预测吻合良好。除此之外，我们还在J型Heliotron中意外地观察到了边缘偏置条件下的类猝发跃迁，这是一个新的有趣的物理现象。

项目成果

Progress of High-Temperature Experiments in the LHD

铲运机高温实验研究进展

• 发表时间: 2013
• 期刊: Stellarator News
• 作者: Y. Kikuchi;I. Sakuma;Y. Kitagawa;Y. Asai;K. Onishi;N. Fukumoto;M. Nagata;Y. Ueda;H. Kurishita;M. Kobayashi;時谷政行;高橋裕己
• 通讯作者: 高橋裕己

article_list(ECH）hp.xls - ech.pdf

Article_list(ECH)hp.xls - ech.pdf

ech.pdf

ech.pdf

Configuration dependence of the transition criterion to an improved confinement mode using a biased electrode in the LHD

使用 LHD 中的偏置电极改进限制模式的转变准则的配置依赖性

• 发表时间: 2011
• 期刊: proceedings of Plasma Conference 2011" (石川県立音楽堂)
• 作者: H. Takahashi;S. Kitajima;K. Ishii,他12名
• 通讯作者: K. Ishii,他12名

Simulation Study on Neoclassical Poloidal Viscosity in Helical Plasmas

螺旋等离子体中新古典极向粘度的模拟研究

• 发表时间: 2012
• 作者: H. Tojo;T. Hatae;T. Sakuma;T. Hamano;K. Itami;A. Ejiri;J. Hiratsuka;T. Yamaguchi;Y. Takase;R.Hiwatari;菊池祐介;G. Matsunaga;佐竹 真介
• 通讯作者: 佐竹 真介