Study on Impurity and Hydrogen Recycling Control Using Divertor-Plasma Simulator

偏滤器等离子体模拟器的杂质及氢气回收控制研究

• 批准号: 04302059
• 负责人: TAKAMURA Shuichi
• 金额: $ 3.14万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Co-operative Research (A)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04302059/
• 关键词: Divertor-Plasma Simulator; NAGDIS-I; High Heat Flux Plasma; Impurity Transport; Hydrogen Recycling; Secondary Electron; Wave Heating; Plasma-Wall Interaction; 核融合; ダイバータ; プラズマ対向材; スパッタリング; 計算機シミュレーション

(1) We have demonstrated the effectiveness of the metal-carbide overlaid graphite for erosion by high heat flux plasma(2) An enhancement of the secondary electron emission from the graphite plate by the hydrogen retention is investigated experimentally and compared with the particle simulation results.(3) An emissive divertor plate, as a new divertor concept, has been tested using the divertor-plasma simulator NAGDIS-I and the dynamic behavior of the bifurcation phenomena has been studied and compared with the theoretical one.(4) Two dimensional profiles of visible light emission of TiI and TiII generated by the pulse target biasing were observed by the fast CCD camera and its profile along the magnetic field was comapred with the results obtained by the Monte Calro simulation. From these comparison the parallel transort of the impurity from the target is considered to be dominated by the friction force with the bulk plasma.(5) Compact and fast CT system for the observation of visible and infrared light emission from plasmas has been developed and the preliminary results of observation of Halpha, HeI and HeII emission was obtained.(6) Characterstics of the wave heating in NAGDIS-I has been studied using B2 code and the heating efficiency was estimated for different plasma conditions.In addition to the research activities mentioned above, two workshops were held and the co-operative research using the divertor-plasma simulator was discussed in detail.

(1)我们证明了金属碳化物覆盖石墨在高热流等离子体侵蚀中的有效性。(2)实验研究了氢保留对石墨板二次电子发射的增强作用，并与粒子模拟结果进行了比较。(3)利用等离子体模拟器NAGDIS-I对发射型导流板这一新型导流器概念进行了测试，研究了其分岔现象的动力学行为，并与理论分析结果进行了比较。(4)利用快速CCD相机观测了脉冲目标偏置产生的TiI和TiII可见光发射的二维轮廓，并将其沿磁场的轮廓与Monte Calro模拟结果进行了比较。从这些比较中，杂质从目标的平行输运被认为是由与体等离子体的摩擦力控制的。(5)研制了用于等离子体可见光和红外光发射观测的紧凑快速CT系统，获得了观测Halpha、HeI和HeII发射的初步结果。(6)利用B2编码研究了NAGDIS-I的波加热特性，并估算了不同等离子体条件下的加热效率。除上述研究活动外，还举办了两次讲习班，详细讨论了利用分流体-等离子体模拟器进行合作研究的问题。

项目成果

K.shiraishi,N.chno,Y.Uesugi,S.Takamura: "Sheath Formation on Carbon and Refractory Metals in a Plasma with Energetic Electrons" Journal of nuclear Materials. 196-198. 745-749 (1992)

K.shiraishi，N.chno，Y.Uesugi，S.Takamura：“具有高能电子的等离子体中碳和难熔金属的鞘层形成”核材料杂志。

N.Noda: "Design Study on Divertor Plates of Large Helical Device" Fusion Technology. 1. 325-328

N.Noda：“大型螺旋装置偏滤板的设计研究”聚变技术。

K.Shiraishi: "Sheath Voltage on Varbon Surface in a Hydrogen Plasma with Hot Electrons" J.Plasma and Fusion Research. 69. 1371-1377 (1993)

K.Shiraishi：“热电子氢等离子体中 Varbon 表面的鞘电压”J.Plasma and Fusion Research。

K.Shiraishi,S.Takamura: "Heat Transmission threagh Plasma Sheath with Energetic Electrons" Contribations to Plasma Plysics. 32. 243-248 (1992)

K.Shiraishi、S.Takamura：“通过具有高能电子的等离子体鞘进行热传输”对 Plasma Plysics 的贡献。

高村 秀一: "熱核融合炉壁近傍における熱と粒子の挙動" 電気学会論文誌. 113-B. 971-976 (1993)

Shuichi Takamura：“热核聚变反应堆壁附近的热和粒子行为”，日本电气工程师学会汇刊 113-B 971-976 (1993)。