Research on Advanced Tokamaks using Dynamic Ergodic Divertorp

采用动态遍历偏转托普的先进托卡马克研究

• 批准号: 14380219
• 负责人: UESUGI Yoshihiko
• 金额: $ 9.73万
• 依托单位: Kanazawa University (2003-2004)Nagoya University (2002)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14380219/
• 关键词: Ergodic divertor; Alfen Resonance; Tokamak Plasma; Shear Flow; Plasma Rotation; Lower Hybrid Wave; MHD Instabilities; Inverter; 回転ヘリカル摂動磁場; プラズマ回転; アルフベン共鳴; 低域混成波加熱; 磁気面; MHD負安定性; インバータ電源; 磁気島; トカマク; ディジタル信号プロセッサー

(1)Improvement of Tokamak Operation for DED ExperimentsAn ohmic coil power supply has been built by combining an IGBT inverter power supply and a capacitor bank. Low q and disruptive discharges can be obtained reproducibly. Radial array magnetic proves have been installed to measure the penetration of the externally applied rotating helical magnetic field and the internal magnetic field during disruptions. The dynamic response of the tokamak plasma against the externally applied rotating helical magnetic field has been studied in detail. A 200 MHz lower hybrid wave heating system has been prepared to improve the rotation drive by DED. Now the antenna coupling and electron heating characteristics are studied.(2)Suppression of Island Growth by Plasma Current ModulationThe toroidal plasma current is modulated quickly to change the local q value and the effects of the plasma current modulation on the magnetic island formation were studied. When the external helical magnetic field is applie … More d, the plasma current modulation strongly suppresses the magnetic perturbation induced by the externally applied helical magnetic field. It is shown that a fast scan of the magnetic resonance surface can suppress the magnetic island growth. But spontaneously excited magnetic perturbations and islands in low q discharges(q〜3) were not suppressed significantly.(3)Dynamics of the Internal Magnetic Structure during Major DisruptionDynamic behavior of the internal magnetic filed during disruptions induced by tearing modes has been studied using an internal magnetic prove array. It is shown clearly that a very rapid drop (〜10μs << current diffusion time) of the poloidal magnetic field at an inner layer has been observed at just start of current quench, resulting a flattening of the current density profile. The internal magnetic field starts to increase slowly after the ringing oscillation (200kHz) of poloidal magnetic field following a sudden drop again. Now detail measurements of the internal magnetic structure have been carried out. Less

（1）DED实验中托卡马克运行的改进采用IGBT逆变电源和电容器组相结合的方法，研制了欧姆线圈电源。低q和破坏性放电可以重复获得。安装了径向阵列磁探针，用于测量破裂过程中外部施加的旋转螺旋磁场和内部磁场的穿透力。本文详细研究了托卡马克等离子体对外加旋转螺旋磁场的动力学响应。一个200 MHz的低杂波加热系统已经准备好，以提高旋转驱动的DED。现在研究天线的耦合和电子加热特性。（2）等离子体电流调制对磁岛生长的抑制通过快速调制环形等离子体电流来改变磁岛的局部q值，研究了等离子体电流调制对磁岛生长的影响。当外加螺旋磁场时， ...更多信息 d，等离子体电流调制强烈地抑制了由外加螺旋磁场引起的磁扰动。结果表明，磁共振表面的快速扫描可以抑制磁岛的生长。但在低q放电（q = 3）中自发激发的磁扰动和磁岛并没有被显著抑制。（3）大破裂过程中内部磁场结构的动力学利用内部磁场阵列研究了撕裂模引起破裂过程中内部磁场的动力学行为。结果表明，在电流失超刚开始时，内层极向磁场迅速下降（<10μs <<电流扩散时间），导致电流密度分布变平。内部磁场在极向磁场的振铃振荡（200kHz）之后开始缓慢增加，然后再次突然下降。现在已经进行了内部磁结构的详细测量。少

项目成果

V.P.Budaev, S.Takamura, Y.Kikuchi, Y.Uesugi, N.Ohno: "Intermittent Structure in the High Field Side Boundary of the HYBTOK-II Tokamak"Czechoslovak Journal of Physics. 53・10. 863-868 (2003)

V.P.Budaev、S.Takamura、Y.Kikuchi、Y.Uesugi、N.Ohno：“HYBTOK-II 托卡马克高场侧边界的间歇结构”捷克斯洛伐克物理学杂志 53・10 (2003)。

V.P.Budaev, Y.Kikuchi, M.Toyoda, Y.Uesugi, S.Takamura: "Effect of Rotating Helical Magnetic Field on the Turbulent Fractal Structure and Transport in the Tokamak Edge Plasma"Journal of Nuclear Materials. 313-316. 1309-1313 (2003)

V.P.Budaev、Y.Kikuchi、M.Toyoda、Y.Uesugi、S.Takamura：“旋转螺旋磁场对托卡马克边缘等离子体中湍流分形结构和传输的影响”核材料杂志。

上杉喜彦, M.A.Razzak, 近藤健二, 菊池祐介, 高村秀一, 今井貴博, 豊田光洋: "プラズマ生成・制御のための高速・高機能インバータ電源とその特性"プラズマ・核融合学会誌. 79・10. 1062-1077 (2003)

Yoshihiko Uesugi、M.A.Razzak、Kenji Kondo、Yusuke Kikuchi、Shuichi Takamura、Takahiro Imai、Mitsuhiro Toyota：“用于等离子体生成和控制的高速、高性能逆变电源及其特性”等离子体与聚变科学学会杂志79・10。1062-1077（2003）

Y.Kikuchi, V.P.Budaev, M.Toyoda, Y.Uesugi, S.Takamura: "Control of Rotating Helical magnetic Field Penetration into Tokamak Plasmas using Electrode Biasing in HYBTOK-II"Journal of Nuclear Materials. 313-316. 1272-1276 (2003)

Y.Kikuchi、V.P.Budaev、M.Toyoda、Y.Uesugi、S.Takamura：“使用 HYBTOK-II 中的电极偏置控制旋转螺旋磁场穿透托卡马克等离子体”核材料杂志。

Direct observation of tokamak plasma responses to the externally applied rotating helical magnetic field in the small tokamak HYBTOK-II

直接观察小型托卡马克 HYBTOK-II 中托卡马克等离子体对外加旋转螺旋磁场的响应

• 发表时间: 2004
• 期刊: Nuclear Fusion 44
• 作者: Y.Kikuchi;Y.Uesugi;S.Takamura;A.G.Elfimov
• 通讯作者: A.G.Elfimov