Electron Cyclotron Current Drive on Magnetic Axis

磁轴上的电子回旋电流驱动

• 批准号: 06452420
• 负责人: TERUMICHI Yasushi
• 金额: $ 3.78万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 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-06452420/
• 关键词: MHD; ECCD; Sawtooth Oscillation; Current Profile; Magnetic Axis; ECH; 電流駆動; MHD; 電子サイクロトロン; ECH; MHD不安定性

1.We equiped soft X-ray cameras, and data acquisition and analysis system for observation of MHD instabilities in the WT-3 tokamak during electron cyclotron heating (ECH) and current drive.2.When we inject ECH power (56GHz 200 kw) and deposit the power on the magnetic axis, an MHD instability with the poloidal mode number m=2 and toroidal mode number n=1 is appeared. While, sawtooth oscillation associate with an m=2/n=1 precursor is appeared in the case of offmagnetic axis ECH.3.We observe a sawtooth crash associated with an m=2/n=1 precursor in a combined Ohmically heated and lower hybrid current drive plasma. A crash associated with an m=3/n=2 follows this crash several seconds later. We investigate these crashes by using seven soft X-ray cameras and computer tomography technic and compared the results with those of usual sawtooth crashes associated with m=1/n=1 precursors.4.We have equiped a new ECH system using an 88 Ghz gyrotron and its quasi-optical transmission and injection system. We will refine the investigation with this ECH system.

1.我们配备了软X射线相机和数据采集和分析系统，用于观察WT-3托卡马克在电子回旋加热（ECH）和电流驱动过程中的MHD不稳定性。2.当我们注入ECH功率（56GHz 200 kw）并将功率沉积在磁轴上时，出现了极向模数m=2和环形模数n=1的MHD不稳定性。同时，在离磁轴ECH的情况下，出现了与m=2/n=1前体相关的锯齿振荡。3。我们在组合欧姆加热和较低混合电流驱动等离子体中观察到与m=2/n=1前体相关的锯齿碰撞。几秒钟后，与 m=3/n=2 相关的崩溃发生在该崩溃之后。我们使用七个软 X 射线相机和计算机断层扫描技术对这些碰撞进行了调查，并将结果与​​与 m=1/n=1 前体相关的常见锯齿碰撞结果进行了比较。4.我们配备了一个新的 ECH 系统，该系统使用 88 Ghz 回旋管及其准光传输和注入系统。我们将利用这个 ECH 系统完善调查。

项目成果

Y.Terumichi: "Control of MHD Activities by ECH in the WT-3 Tokamak" Proc.15th Intern.Conf.on Plasma Physics and Contr.Nucl.Fusion Res.Seville, Sept-Oct. IAEA-CN/A3/5-P-3. (1994)

Y.Terumichi：“WT-3 托卡马克中 ECH 对 MHD 活动的控制”Proc.15th Intern.Conf.on Plasma Chemistry and Contr.Nucl.Fusion Res.Seville，9-10 月。

T.Maehara: "Fast Electron Momentum Distributions in Lower Hybrid and Electron Cyclotron Current Drive Plasmas" Physics Letters A. Vol 208. 143-149 (1995)

T.Maehara：“低混合和电子回旋电流驱动等离子体中的快速电子动量分布”《物理快报 A》第 208 卷 143-149 (1995)

T. Maehara: "East Electron Momentum Distribusions in Lower Hybrid and Electron Cyclotron Current Drive Plasmas" Physics Letters A. 208. 143-149 (1995)

T. Maehara：“低混合和电子回旋电流驱动等离子体中的东电子动量分布”《物理快报》A. 208. 143-149 (1995)

Y.Terumichi: "Control of MHD Activities by ECH in the WT-3 Tokamak" Proc.15th Intern.Conf.on Plasma Phys.and controlled Nuclear Fusion Research. (発表予定).

Y.Terumichi：“WT-3 托卡马克中 ECH 对 MHD 活动的控制”Proc.15th Intern.Conf.on Plasma Phys.and 受控核聚变研究（待提交）。

S. Yoshimura: "Suppression of MHD Activities by Electron Cyclotron Heating in WT-3" AIP Conference Proceedings. 355. 151-154 (1996)

S. Yoshimura：“WT-3 中电子回旋加热对 MHD 活动的抑制”AIP 会议记录。