Experiment on Ion-Beam-Collider for D-^3He Fusion

D-^3He聚变离子束对撞机实验

• 批准号: 03680009
• 负责人: MOHRI Akihiro
• 金额: $ 0.96万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03680009/
• 关键词: D-^3He fusion; ion beam collider; direct energy converter; helicon wave; open system; magnetic insulation; mirror loss; D-He核融合; 直接エネルギー変換; 電磁場結合ポテンシャル; DーHe核融合; イオンビ-ムコライダ-; 直接エネルギ-変換; ミラ-損失

This research was performed to examine a new method for D-^3He fusion. To generate the fusion reaction, counterstreaming energetic ions are produced and trapped in the radial effective potential well whichis formed by a radial electric field and an axial magnetic field. A 2D-Fokker-Plank code shows that a net fusion output is obtainable at an energy confinement time in a probably accessible range. Fundamental features of this method have been examined through experiments as follows.(1) A dense plasma core as the ion source can be formed and maintained in a axial magnetic field. The core plasma is produced by exciting hilicon waves of a helical mode under preferential pumping of neutral gas.(2) The core is biased at a high positive potential for ion beam extraction. Here, magnetic insulation well works to sustain the potential up to 3 kV at the magnetic field of 3 kG. The formed radial electric field becomes very strong at the core surface.(3) Ions are easily extracted from the core plasma by the radial electric field and observed their orbits are in good agreement with the theoretical ones. Thus, counter-collisions among fast ions are really present.(4) Fatal instabilities have not been observed yet.The magnetic field available in the present stage is not enough to cause fusion. However, it will be possible if the field is increased to 5 kG or higher.

这项研究是为了检验一种新的D-^3He聚变方法。为了产生聚变反应，产生逆流高能离子并将其捕获在由径向电场和轴向磁场形成的径向有效势阱中。一个二维Fokker Plank代码表明，净聚变输出是可获得的能量约束时间在一个可能的范围内。这种方法的基本特征已经通过如下实验进行了检验。(1)作为离子源的致密等离子体芯可以形成并保持在轴向磁场中。核心等离子体是在中性气体的优先抽运下激发螺旋模式的希力康波而产生的。(2)核心被偏置在一个高的正电位离子束提取。在这里，磁绝缘良好的工作，以维持电位高达3千伏的磁场为3千克。所形成的径向电场在芯表面变得非常强。(3)在径向电场的作用下，离子很容易从芯部等离子体中被引出，观测到离子的轨道与理论轨道符合得很好。因此，快速离子之间的反碰撞是真实存在的。(4)目前还没有观察到致命的不稳定性，现阶段可用的磁场还不足以引起聚变。但是，如果磁场增加到5 kG或更高，则有可能。

项目成果

H・TANAKA: "Experiment on Ion Beam collider for Advanced Fuel Fusion" Europhysics Conference on Controlled Fusion Plasma Physics. 15C. 217-220 (1991)

H. TANAKA：“先进燃料聚变的离子束对撞机实验”欧洲物理学会议受控聚变等离子体物理 15C 217-220 (1991)。

H. Tanaka et.al.: "Experiment on Ion Beam Collider for Advanced Fuel Fusion" Europhysics Conf. Abstrats, 18th European Conferece on Controlled Fusion and Plasma Physics. Vol.15C. 217-220 (1991)

H. Tanaka 等人：“先进燃料聚变离子束对撞机实验”欧洲物理学会。

田中 仁: "Experiment on Ion Beam Collider for Advanced Fuel Fusion" Proc.of 18th European Conference on Confrolled Fusion and Plasma Physics. 15C PartII. 217-220 (1991)

Hitoshi Tanaka：“先进燃料聚变的离子束对撞机实验”第 18 届欧洲受控聚变和等离子体物理会议 15C 第 II 部分（1991 年）。