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对于高热通量等离子体腐蚀的有效性(2) 通过实验研究了氢保留对石墨板二次电子发射的增强，并与粒子模拟结果进行了比较(3)采用偏滤器等离子体模拟器NAGDIS-I对发射偏滤器板作为一种新的偏滤器概念进行了测试，研究了分叉现象的动态行为并与理论分叉现象进行了比较。(4)2利用快速CCD相机观察了脉冲靶偏置产生的TiI和TiII可见光发射的空间分布，并将其沿磁场的分布与蒙特卡罗模拟得到的结果进行了比较。从这些比较来看，来自靶材的杂质的平行传输被认为是由与本体等离子体的摩擦力主导的。(5)开发了用于观察等离子体的可见光和红外光发射的紧凑且快速的CT系统，并且获得了Halpha、HeI和HeII发射观测的初步结果。(6)使用B2代码研究了NAGDIS-I中的波加热特性，并估计了不同等离子体条件下的加热效率。除了提到的研究活动之外上面，两个举办了研讨会，并详细讨论了使用偏滤器-等离子体模拟器的合作研究。

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。

増崎 貴,大野 哲靖,高木 誠,高村 秀一: "高熱流プラズマの生成とその高速掃引プロズマ計測システムによる計測" 電気学会論文誌A. 112-A. 913-921 (1992)

Takashi Masuzaki、Tetsuyasu Ohno、Makoto Takagi、Shuichi Takamura：“高热流等离子体的生成及其使用高速扫描等离子体测量系统的测量”IEEJ Transactions A. 913-921 (1992)。