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)偏滤器等离子体模拟器中靶板等离子体热流的控制等离子体分离密度阈值的确定获得分离等离子体密度阈值的实验和分析结果。分离等离子体中电子能量损失通道的存在，使分离等离子体中电子能量损失通道的存在成为可能。分离等离子体中电子能量损失过程的清晰观测可见连续谱线以及一系列He Balmer谱线表明，分离重组等离子体中的电子能量损失通道的存在，使分离重组等离子体中的电子能量损失通道的存在成为可能。通过调制放电电流获得了电子温度随时间的变化。热<-4.5>电子和二次电子发射对靶板等离子体热流的影响靶板的热电子和二次电子发射抑制了鞘层电压，增强了靶板的等离子体热流（2）等离子体分离的二维流体模拟（3）偏滤器模拟器中的离子回旋波加热

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。

N.Ezumi et al.: "Density Threshold for Plasma Detachment in Gas Target" Journal of Nuclear Materials. (in press).

N.Ezumi 等人：“气体靶中等离子体分离的密度阈值”核材料杂志。