Simulation of Transient Transport Phenomena in Toroidal Plasmas

环形等离子体中瞬态输运现象的模拟

• 批准号: 06680479
• 负责人: FUKUYAMA Atsushi
• 金额: $ 1.28万
• 依托单位: Okayama 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: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06680479/
• 关键词: Toroidal Plasma; Transport Phenomena; H Mode; Radial Electric Field; Plasma Rotation

In order to study the particle transport and transient transport processes in toroidal plasmas, we have developed a transport simulation code including radial electric field and plasma rotation. Neoclassical transport and turbulent transport are included. Without an empirical pinch term, stationary density profile was obtained. The modification of a density profile during neutral beam injection, which has been observed in tokamak experiments, was reproduced by the simulation.The dependence of the stationary density profile on the plasma current and the plasma temperature was studied in Ohmic plasmas. The central density is approximately proportional to the square of the plasma current and the inverse of the central temperature.The influence of particle recycling rate, ion orbit loss and edge temperature on the density profile was studied by the transport analysis including the scrape-off layr.The preliminary result of the analysis including heat transport shows flattening of the density profile by central heating.The simulation code was modified to include toroidal viscosity essential for plasmas in helical systems. The effect on the plasma rotation and density profile was studied.The simulation code was extended to exchange simulation data with the wave analysis codes and the Fokker-Planck code in order to analyze the wave heating and current drive.

为了研究环形等离子体中的粒子输运和瞬态输运过程，我们开发了一个包括径向电场和等离子体旋转的输运模拟程序。包括新古典输运和湍流输运。在没有经验箍缩项的情况下，得到了稳定的密度分布。模拟再现了托卡马克实验中观察到的中性束注入过程中密度分布的变化，研究了欧姆等离子体中稳态密度分布与等离子体电流和等离子体温度的关系。中心密度近似与等离子体电流的平方成正比，与中心温度成反比。通过输运分析研究了离子轨道损失和边缘温度对密度分布的影响，分析的初步结果表明，由于集中加热，密度分布变得平坦。对模拟程序进行了修改，螺旋系统中等离子体的环形粘性。研究了等离子体旋转和密度分布的影响，并扩展了模拟程序，使之能与波分析程序和Fokker-Planck程序交换模拟数据，以分析波加热和电流驱动。

项目成果

A.Fukuyama, Y.Fuji, K.Itoh and S.-I.Itoh: "Transport Modelling Including Radial Electric Field and Plasma Rotation" Plasna Phys.Control.Fusion. Vol.36, No.7A. A159-A164 (1994)

A.Fukuyama、Y.Fuji、K.Itoh 和 S.-I.Itoh：“包括径向电场和等离子体旋转的传输建模”Plasna Phys.Control.Fusion。

Y.Fuji: "Transport modeling of L/H transition in tokamaks" Transactions of Fusion Technology. Vol.27. 485-488 (1995)

Y.Fuji：“托卡马克 L/H 转变的传输建模”融合技术汇刊。

A.Fukuyama: "Transport modelling including radial electric field and plasma rotation" Plasma Physics and Controlled Fusion. 36. A159-A164 (1994)

A.Fukuyama：“传输模型，包括径向电场和等离子体旋转”等离子体物理和受控聚变。

A.Fukuyama: "Theory of improved confinement in high-β_p tokamaks" Plasma Physics and Controlled Fusion. 36. 1385-1390 (1994)

A.Fukuyama：“高 β_p 托卡马克的改进约束理论”等离子体物理和受控聚变。 36. 1385-1390 (1994)

A. Fukuyama: "Theory of improved confinement in high -β_p tokamaks" Plasma Physics and Controlled Fusion. 36. 1385-1390 (1994)

A. Fukuyama：“高 -β_p 托卡马克的改进约束理论”等离子体物理和受控聚变。 36. 1385-1390 (1994)