Study of plasma-Wall Interactions in Divertor Simulator

偏滤器模拟器中等离子体-壁相互作用的研究

• 批准号: 07044140
• 负责人: TAKAMURA Shuichi
• 金额: $ 2.05万
• 依托单位: NAGOYA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07044140/
• 关键词: magnetic divertor; divertor simulator; gas target; 2D fluid Simulation; control of heat flow; ion cyclotron heating; fusion; plasma-wall interactions; ダイバータ; 動的ガス・ターゲット・ダイバータ

(1) Control of Plasma Heat Flow to Target Plate in Divertor Plasma Simulators.Finding of Density Threshold for Plasma DetachmentExperimental and analytical finding of density threshold to obtain a detached plasma. The reason comes from the electron energy loss channel through the e-i energy exchange.Clear Observation of Recombination Process in Detached PlasmasVisible continuum as well as a series of He Balmer spectral lines shows consistently a partial local thermoequilibrium with the plasma temperature of 0.1-0.3eV for detached recombining plasmas.Demonstration of Recombination-dependent partial Flux to the TargetTemporal change in electron temperature has been obtained by the modulated discharge current. The particle flux to the target was found to be very sensitively dependent of T_e on the recombinations rate proportional to T_e^<-4.5>.Effect of Thermo-and Secondary Electron Emissions to Plasma Heat Flow to the TargetThe suppression of the sheath voltage and the enhancement of the plasma heat flow to the target plate are clearly found due to the thermo-and secondary electron emission form the plate(2) 2D Fluid Simulation on the Plasma Detachment(3) Ion Cyclotron Wave Heating in the Divertor Simulator

(1) 在偏滤器等离子体模拟器中控制流向目标板的等离子体热流。等离子体分离的密度阈值的发现实验和分析发现获得分离等离子体的密度阈值。原因来自于通过 e-i 能量交换的电子能量损失通道。分离等离子体中复合过程的清晰观察可见连续谱以及一系列 He Balmer 谱线始终显示出局部局域热平衡，等离子体温度为 0.1-0.3eV分离的重组等离子体。对目标的重组相关部分通量​​的演示已通过以下方法获得了电子温度的时间变化调制放电电流。发现到达目标的粒子通量非常敏感地依赖于 T_e 与与 T_e^<-4.5> 成比例的复合率。热电子和二次电子发射对到达目标的等离子体热流的影响鞘层电压和由于板的热电子和二次电子发射，可以清楚地发现流向靶板的等离子体热流增强(2) 等离子体分离 (3) 离子的二维流体模拟偏滤器模拟器中的回旋波加热

项目成果

N.Ohno et al.: "Numerical Simulation on Density Dependence of Plasma Detachment in Simulated Gas Divertor Experiments of the TPD-I Device" Contrib.Plasma Physics. 36・2/3. 339-343 (1996)

N.Ohno 等人：“TPD-I 装置模拟气体偏滤器实验中等离子体分离密度依赖性的数值模拟”Contrib.Plasma Chemistry 36・2/3 (1996)。

N.Ohno et al.: "Numerical Simulation on Density Dependence of Plasma Detachment in Simulated Gas Divertor Experiments of the TPD-I Device" Contrib.Plasma Physics. 36. 339-343 (1996)

N.Ohno 等人：“TPD-I 装置模拟气体偏滤器实验中等离子体分离密度依赖性的数值模拟”Contrib.Plasma Chemistry。

S.Takamura et al.: "Suppression of Secondary Electron Emission from the Material Surface with Grazing Incident Magnetic Field in the Plasma." Plasma of Physics. 3. 4310-4312 (1996)

S.Takamura 等人：“利用等离子体中的掠入射磁场抑制材料表面的二次电子发射”。

N. Ohno et al.: "Numerical Simulation Study on Density Dependence of Plasma Detachment in Simulated Gas Divertor Experiments of the TPD-I Device" to be published in Contributions to plasma physics.

N. Ohno 等人：“TPD-I 装置模拟气体偏滤器实验中等离子体分离密度依赖性的数值模拟研究”将发表在《等离子体物理学贡献》上。

M.Y.Ye et al.: "Nonlinear Interactions between High Heat Flux Plasma and Electron Emissive Hot Material Surface" Physics of Plasma. 3. 281-292 (1996)

M.Y.Ye 等人：“高热通量等离子体与电子发射热材料表面之间的非线性相互作用”等离子体物理学。