Current drive and its spatial diffusion of high-beta plasma by the application of RF rotating magnetic field

射频旋转磁场对高β等离子体的电流驱动及其空间扩散

• 批准号: 14380212
• 负责人: GOTO Seiichi
• 金额: $ 5.89万
• 依托单位: Osaka University
• 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 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14380212/
• 关键词: FRC plasma; Current drove; IGBT inverter circuit; RF LC resonant circuit; Rotating magnetic field

The main purpose of this research is to form the FRC plasma, which is famous for its natural high-beta, by the application of the rotating magnetic field (RMF) inside the stainless chamber. By choosing the adequate rotating frequency, only ions are dragged by the field, and then toroidal current is produced. New power source is developed to generate the required RMF. It is composed from inverter circuit, air core transformer and LC tank circuit.The profile of the internal field is measured by the magnetic probe array. After the application of RMF, the strength of the bias field at its center axis becomes to be reversed, and its reversal continues as long as the RMF is applied. The relation of major radius and separatrix radius that are calculated from the measurement is found to be consistent with the theoretical equilibium relation. The produced current is proportional to the strength and the frequency of the applied RMF. Above experiments are performed in the condition without mirror field. The field reversal is measured at points where the RMF is not applied. So the produced toroidal current is found to diffuse spatialy.

本研究的主要目的是利用旋转磁场（RMF）在不锈钢腔内形成以天然高β而闻名的FRC等离子体。通过选择合适的旋转频率，只有离子被磁场拖曳，从而产生环向电流。开发了新的电源以产生所需的RMF。它由逆变电路、空芯变压器和LC罐电路组成。利用磁探针阵列测量了内部磁场的轮廓。施加RMF后，其中心轴处的偏置场强度开始反转，只要施加RMF，其反转就会持续下去。通过实测计算得到的主半径与分离半径的关系与理论平衡关系基本一致。产生的电流与施加RMF的强度和频率成正比。以上实验均在无镜场条件下进行。在没有应用RMF的点上测量磁场反转。因此产生的环向电流在空间上是扩散的。

项目成果

K.Kitano et al.: "Development of High-Power Inverter Supply for current Drive of FRC Plasma""Journal of high temperature society of Japan. Vol.29. 146-151 (2003)

K.Kitano 等人：“FRC 等离子体电流驱动用大功率逆变电源的开发”《日本高温学会杂志》第 29 卷 146-151（2003 年）

北野 勝久 et al.: "FRCプラズマの電流駆動を目的とした高周波インバーター電源の開発"平成15年電気学会全国大会講演論文集. 4・098. 150-151 (2003)

Katsuhisa Kitano等人：“FRC等离子体电流驱动的高频逆变器电源的开发”日本电气工程师学会2003年全国会议记录4・098（2003）。

S.Yoshimura et al.: "Measurement system for rapid displacement of translated FRC plasma using computer tomography data of two different cross-sections"Journal of high temperature society of Japan. Vol.29. 146-151 (2003)

S.Yoshimura等人：“使用两个不同横截面的计算机断层扫描数据的平移FRC等离子体快速位移的测量系统”日本高温学会杂志。

N.Iwasawa et al.: "Global eigenmodes of low frequency waves in field-reversed configuration plasmas"Physics of Plasmas. Vol.11. 614-624 (2004)

N.Iwasawa 等人：“场反转配置等离子体中低频波的全局本征模”等离子体物理学。

T.Kanki et al.: "Magnetohydrodynamic simulation of dynamical behavior of a field-reversed configuration during magnetic mirror reflection"Physics of plasmas. Vol.10. 3535-3643 (2003)

T.Kanki 等人：“磁镜反射期间场反转配置动态行为的磁流体动力学模拟”等离子体物理学。