Multi-frequency electron cyclotron heating and current drive

多频电子回旋加热和电流驱动

• 批准号: 02402053
• 负责人: TERUMICHI Yasushi
• 金额: $ 5.5万
• 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 (A)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02402053/
• 关键词: ECH; GYROTRON; TOKAMAK; ECCD; LHCD; プラズマ; 電子サイクロトロン波; 加熱; 電流駆動; 電子サイクロトロン

Double frequency electron cyclotron heating (ECH) was tested in the WT-3 tokamak to demonstrate the effects of multi frequency ECH. A 56GHz ECH system has been illustrated in WT-3. A new 48GHz ECH system is installed. A prototype of a 48GHz, 200kW, 30msec pulse gyrotoron was developed for the new ECH system.Double frequency (56 and 48GHz) ECH is applied to ohmic heating or lower hybrid current drive (LHCD) plasmas in WT-3. A notable effect of double frequency ECH can be observed in LHCD plasmas. In the case of single frequency ECH, the central electron temperature TィイD2e0ィエD2 increases up to about 600eV by 48GHz ECH and up to about 550eV by 56GHz ECH from original TィイD2e0ィエD2 of about 350eV when the 2nd harmonic resonance layer is localized near plasma center. In the case of double frequency ECH, 56GHz 2nd harmonic resonance layer is localized near plasma center and 48GHz 2nd harmonic resonance is near half of the minor radius in the low field size. TィイD2e0ィエD2 increases up to about 800eV. The effect of double frequency ECH is clear but the mechanism has not yet been cleared. The further study is required.

在WT-3托卡马克上进行了双频电子回旋加热实验，以验证多频电子回旋加热的效果。WT-3中展示了一个56 GHz的ECH系统。安装了一个新的48 GHz ECH系统。研制了一台48 GHz、200kW、30 ms脉冲回旋管样机，用于WT-3的欧姆加热或低杂波电流驱动(LHCD)等离子体。在LHCD等离子体中观察到明显的倍频ECH效应。在单频ECH的情况下，当第二谐振层位于等离子体中心附近时，中心电子温度TィイD2e0ィエD2由原来的约350 eV的TィイD2e0ィエD2增加到约600 eV。在倍频ECH情况下，56 GHz二次谐振层位于等离子体中心附近，48 GHz二次谐振层在低场下接近小半径的一半。TィイD2e0ィエD2增加到约800 eV。倍频ECH的作用是明确的，但其作用机制尚不清楚。这还需要进一步的研究。

项目成果

Y.Terumichi: "Electron cyclotron,lower hybrid current drive and heating on the WTー3 tokamak" 13th Intern.Conf.on Plasma Phys.and Controlled Nucl.Fusion Res.IAEAーCNー53/Eー3ー5.

Y.Terumichi：“电子回旋加速器、WT-3 托卡马克的低混合电流驱动和加热”第 13 届等离子体物理与受控核聚变研究实习生会议 IAEA-CN-53/E-3-5。