Dynamic Formation of Plasma Rotation in a Tokamak

托卡马克中等离子体旋转的动态形成

• 批准号: 11480113
• 负责人: UESUGI Yoshihiko
• 金额: $ 7.74万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11480113/
• 关键词: Plasma Rotation; Electrode Biasing; Electric Field Shear; E × B Plasma Rotation; Rotating Helical Magnetic Field; Dynamic Ergodic Divertor; IGBT Inverter Power Supply; Fast Feedback Control; IGBTインバータ電源; アルフヴェン共鳴; 磁気島; ディジタルフィードバック制御; EXBシアーフロ

This research has been carried out to study (1) the dynamic formation process of the plasma rotation, (2) the relation between the plasma rotation and the sheared electric structure and (3) the formation process of the plasma rotation by the rotating helical magnetic field. So far, the following results has been obtained ;Fast response IGBT power supplies for Joule and vertical field coils have been installed in HYBTOK-II tokamak in order to produce target tokamak plasmas with good reproducibility. By the digital feedback control of the plasma horizontal position with a digital signal processor, flexible operation of the plasma current can be done very effectively, such as AC tokamak operation, rapid current rise and so on.Helical coils with m=6/n=1 as a main mode has been installed in HYBTOK-II and characteristics of the induced rotating helical field(RHF) in the present helical coil system were studied. When the direction of the helical field rotation is same as that of the plasma E × B rotation, the relative velocity decreases and the intensity of RHF is enhanced due to redistribution of the plasma current by island formation. When they are opposite, the intensity of RHF is remarkably dumped by the generation of the shielding current at the resonance layer.The electrode biasing is applied to modify the plasma rotation. In the preliminary experiment it is found that the modification of the plasma rotation by electrode biasing strongly affects the penetration of RHF and the dynamic relaxation of the RHF intensity has been observed just after the turn of the biasing.

已经进行了这项研究以研究（1）血浆旋转的动态形成过程，（2）等离子体旋转与剪切的电结构之间的关系以及（3）旋转螺旋磁场的等离子体旋转的形成过程。到目前为止，已经获得了以下结果；焦耳的快速响应IGBT电源和垂直场线圈已安装在Hybtok-II Tokamak中，以产生具有良好可重复性的目标Tokamak等离子体。通过数字信号处理器对等离子体水平位置的数字反馈控制，可以非常有效地进行等离子体电流的灵活操作，例如AC Tokamak操作，快速电流上升升高等。M= 6/N = 1作为主要模式的螺旋线圈已在HYBTOK-II中安装在HYBTOK-II中，并在旋转的旋转螺旋架上安装了旋转的旋转螺旋。当螺旋场旋转的方向与等离子体E×B旋转的方向相同时，由于岛形成对等离子体电流的重新分布，相对速度降低并且RHF的强度得到了增强。当它们相反时，RHF的强度会因共振层处的屏蔽电流的产生而明显倾倒。电极偏置用于修改血浆旋转。在初步实验中，发现通过偏置电极对等离子体旋转的修饰会强烈影响RHF的穿透力，并且在偏置转弯后已经观察到RHF强度的动态弛豫。

项目成果

菊池祐介, 小島寛樹, 谷山智則, 豊田光洋, 上杉喜彦, 高村秀一: "動的エルゴディックダイバータ実験に用いる局所ヘリカルコイル系の特性評価"電気学会論文誌A. 121-A・3. 249-255 (2001)

Yusuke Kikuchi、Hiroki Kojima、Tomonori Taniyama、Mitsuhiro Toyota、Yoshihiko Uesugi、Shuichi Takamura：“动态遍历分流器实验中使用的局部螺旋线圈系统的特性评估”日本电气工程师学会会刊 A. 121-A・3。 249-255 (2001)

菊池祐介,小島寛樹,谷田智則,豊田光洋,上杉喜彦,高村秀一: "動的エルゴディックダイバータ実験に用いる局所へリカルコイル系の特性評価"電気学会論文誌. 120-A(印刷中). (2001)

Yusuke Kikuchi、Hiroki Kojima、Tomonori Tanida、Mitsuhiro Toyota、Yoshihiko Uesugi、Shuichi Takamura：“用于动态遍历分流器实验的局部螺旋线圈系统的特性评估”日本电气工程师学会会刊 120-A（出版中）。 （2001）

M Toyoda, T. Taniyama, Y. Kikuchi, Y. Uesugi, S.Takamura: "Improvement of the Plasma Control by IGBT Invertor Power Supplies in HYBTOK-II Tokamak"Proc. 25 th Int. Conf. on Phenomena in Ionized Gases, Nagoya. Vol. 3. 191-192 (2001)

M Toyoda、T. Taniyama、Y. Kikuchi、Y. Uesugi、S.Takamura：“HYBTOK-II 托卡马克中 IGBT 逆变器电源对等离子控制的改进”Proc。

Y. Kikuchi, V. P. Budaev, Y. Uesugi, M. Toyoda, S. Takamura: "Dynamic Behaviors of Tokamak Plasma Induced by Externally Rotating Helical Magnetic Field"to be presented in 29 th EPS Conference, Montreux, Switzerland. (2002)

Y. Kikuchi、V. P. Budaev、Y. Uesugi、M. Toyoda、S. Takamura：“外部旋转螺旋磁场诱导的托卡马克等离子体的动态行为”将于瑞士蒙特勒举行的第 29 届 EPS 会议上发表。

Y. Kikuchi, H. Kojima, T. Taniyama M. Toyoda, Y. Uesugi, S. Takamura: "Characteristics of Local Helical Coil System for Dynamic Ergodic Divertor"Electrical Engineering in Japan. Vol. 139. 16-23 (2002)

Y. Kikuchi、H. Kojima、T. Taniyama M. Toyoda、Y. Uesugi、S. Takamura：“动态遍历偏滤器局部螺旋线圈系统的特性”日本电气工程。