Comparative Study of Confinement Physics in Toroidal Plasmas

环形等离子体中约束物理的比较研究

• 批准号: 08045027
• 负责人: HAYASHI Takaya
• 金额: $ 4.74万
• 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 international Scientific Research
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08045027/
• 关键词: toroidal plasma; plasma confinement; heliac; helical plama; computer simulation; plasma heating; plasma diagnosis; complexity plasma; プラズマ3次元平衡; プラズマ安定性

Based on agreement on academic exchange between National Institute for Fusion Science (NIFS) and the Australian National University (ANU), which was concluded on May, 1995, this project has aimed at understanding physics mechanism of various plasma phenomena occurring in toroidal geometry like the helical system plasma. 1. Concerning plasma theory, magnetic island formation and self-healing in three dimensional finite pressure equilibria, linear stability and nonlinear time development of pressure driven instabilities, optimizationof magnetic field configuration for helical axis stellarator, plasma self-organization, and development of advanced visualization technology by using virtual reality system are studied successfully as collaborative researches. 2. As for plasma heat ingexperiment, a device for electron cyclotron resonance heating was developed as a collaborative research, and was applied for the H-1 helical device in ANU.In addition, possibility of plasma heating by using ion cyclotron resonance heating was analyzed and proved to be valid in the complex geometry of helical axis stellarator. 3. Comparative study of plasma confinement between CHS in NIFS and H-1 in ANU has been executed, and common properties concerning fluctuation-driven particle flux was revealed. The new knowledge suggests existence of improved confinement mechanism not only for stellarator, but also for tokamak plasnas. 4. Innovative methods for diagnosis of plasma density have been developed out of collaborative research, and were proved to be of practical level by applying the device in LHD plasma measurements.

根据国家核聚变科学研究所 (NIFS) 和澳大利亚国立大学 (ANU) 于 1995 年 5 月达成的学术交流协议，该项目旨在了解螺旋系统等离子体等环形几何结构中发生的各种等离子体现象的物理机制。 1. 在等离子体理论方面，合作研究成功地研究了三维有限压力平衡中的磁岛形成和自修复、压力驱动不稳定性的线性稳定性和非线性时间发展、螺旋轴仿星器磁场配置的优化、等离子体自组织以及利用虚拟现实系统开发先进可视化技术。 2. 在等离子体加热实验方面，合作研究开发了一种电子回旋共振加热装置，并应用于澳大利亚国立大学H-1螺旋装置。此外，分析了利用离子回旋共振加热进行等离子体加热的可能性，并证明在螺旋轴仿星器的复杂几何结构中是有效的。 3.对NIFS中的CHS和ANU中的H-1之间的等离子体约束进行了比较研究，揭示了波动驱动的粒子通量的共同特性。新知识表明，不仅对于仿星器，而且对于托卡马克等离子体，都存在改进的限制机制。 4. 合作研究开发出等离子体密度诊断的创新方法，并通过将该装置应用于LHD等离子体测量，证明具有实用水平。

项目成果

K.Ichiguchi, N.Nakajima, M.Okamoto: "Theoretical prediction of bootstrap current in the large helical device with unbalanced halical coil currents" Nuclear Fusion. 37. 1109 (1997)

K.Ichiguchi、N.Nakajima、M.Okamoto：“具有不平衡螺旋线圈电流的大型螺旋装置中自举电流的理论预测”核聚变。

T.Hayashi: "Nonlinear simulation of Internal Reconnection Event in spherical tokamak" Nuclear Fusion. in print. (1999)

T.Hayashi：“球形托卡马克内部重联事件的非线性模拟”核聚变。

K.Kawahata, K.Tanaka, Y.Ito, A.Ejiri, S.Okajima: "Far infrared laser interferometer system on the Large Helical Device" Rev.Sci.Instruments. 70. 707 (1999)

K.Kawahata、K.Tanaka、Y.Ito、A.Ejiri、S.Okajima：“大型螺旋装置上的远红外激光干涉仪系统”Rev.Sci.Instruments。

J.Howard: "Modulated optical solid-sltate spectrometer applications in plasma diagnostics" Rev.Sci.Instruments. 70. 368 (1999)

J.Howard：“调制光学固态光谱仪在等离子体诊断中的应用”Rev.Sci.Instruments。

S.S.Lloyd: "Magnetic Islands Formation in a Low Shear Configuration" J.Plasma Fusion Res.Series. 1・1. 484-486 (1998)

S.S.Lloyd：“低剪切配置中的磁岛形成”J.Plasma Fusion Res.Series 1・1（1998）。