Investigation of behavior of scrape-off plasma flow in ultra-high beta configuration

超高β配置中刮除等离子体流行为的研究

• 批准号: 11480108
• 负责人: GOTO Seiichi
• 金额: $ 7.81万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11480108/
• 关键词: Nuclear Fusion; high beta plasma; confinement improvement; D-3He Fusion; Field Reversed Configuration; 低中性子発生; 磁場反転配位; 極限ベータ配位; スクレープオフプラズマ; ミラー磁場; 静電プローブ; 磁気プローブ; 反転磁場配位; 高ベータ; スクレーフオフ; 分光測定

Field Reversed Configuration (FRC) is considered to be a promising candidate for the D-3He fusion reactor because of its high beta value.FRC is elongated in shape, the ratio of length to diameter being about 10 and has magnetic mirror at both ends. Therefore, the behavior of the scrape-off plasma flow from the high temperature core plasma seems to be different from that of tokamaks because of the mirror throat at both ends.In the present research project, the behavior of the scrape-off plasma flow from the high temperature core plasma was investigated. Furthermore, the correlation between the plasma flow and the particle confinement properties of the core plasma was also investigated. The experimental results suggested that the scrape-off plasma flow behaved like the magnetohydrodynamic flow and that the confinement properties were improved by the increment of the mirror field intensity. Furthermore, we have found that by the axial compression the separatrix radius increased and the confinement was improved and that the particle confinement time became two times larger by the neutral beam injection.

场反向构型（FRC）是一种长径比约为10的细长形结构，两端带有磁镜，具有较高的β值，被认为是D-3 He聚变堆的理想选择。因此，高温堆芯等离子体中的刮离等离子体流的行为似乎与托卡马克中的刮离等离子体流的行为不同，这是因为在两端都有镜喉。此外，还研究了等离子体流动与堆芯等离子体粒子约束特性之间的相关性。实验结果表明，刮离等离子体流表现出类似磁流体动力学流的特性，镜场强度的增加改善了等离子体的约束特性。此外，我们还发现，通过轴向压缩的分界线半径增加，改善约束和粒子约束时间变得两倍大的中性束注入。

项目成果

K. Yamanaka, S. Yoshimura, K. Kitano, S. Okada, and S. Goto: "Heating experiment of field-reversed configuration plasma by low-frequency magnetic pulse"Physics of Plasmas. Vol.7, No.7. 2755-2758 (2000)

K. Yamanaka、S. Yoshimura、K. Kitano、S. Okada 和 S. Goto：“低频磁脉冲加热场反转构型等离子体的实验”等离子体物理学。

T.Asai, et. al.: "Improvement of plasma confinement on a field-reversed configuration with strong mirror field by neutral beam injection "Transactions of Fusion Technology. 39. 366-369 (2001)

T.浅井，等。

K.Kitano et al.: "Axial Length and Separatrix Radius Behavior of Field-Reversed Configuration Plasma in Dynamic Compression of Mirror Distance"Physics of Plasmas. 7・4. (2000)

K.Kitano 等：“镜距离动态压缩中场反转配置等离子体的轴向长度和分界半径行为”等离子体物理学 7・4。

K. Kitano, S. Maeshima, S. Okada, and S. Goto: "Dynamic process during axial magnetic compression of field-reversed configuration for equilibrium shape control"Physics of Plasmas. Vol.8, No.8. 3630-3634 (2001)

K. Kitano、S. Maeshima、S. Okada 和 S. Goto：“用于平衡形状控制的场反转配置的轴向磁压缩期间的动态过程”等离子体物理学。

S.Okada, et al.: "Experiments on Additional Heating of FRC Plasmas"Nuclear Fusion. 41・5. 625-629 (2001)

S.Okada 等：“FRC 等离子体的额外加热实验”核聚变 41・5（2001 年）。