Evaluation and improvement of confinement properties of stellarator configurations based on the Fourier modes of boundary shape

2014 Fiscal Year Final Research Report

• Project/Area Number: 23561005
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: OKAMURA Shoichi 核融合科学研究所, ヘリカル研究部, 特任教授 (60115540)
• Co-Investigator(Kenkyū-buntansha): SUZUKI Yasuhiro 核融合科学研究所, 准教授 (20395758)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Keywords: ヘリカル磁場配位 / 磁場配位最適化 / 最外殻形状 / フーリエモード

Outline of Final Research Achievements

For the fusion research with the stellarator devices, a new concept of the three-dimensional magnetic configuration was developed for the improved confinement based on the mathematical analysis of the Fourier modes of the boundary shape of plasmas. It was found that the basic characteristics of the magnetic configurations are determined by the fundamental low-mode Fourier elements. By arranging a new combination of the Fourier elements, a new magnetic configuration was invented which has a good confinement properties for the high-beta equilibria. For such a new configuration, the magnetic coil was designed for realizing the fusion reactor with simple helical coil windings which is beneficial for reducing the construction costs.

Free Research Field

核融合科学