DEVELOPMENT OF TRAVELING WAVE ICRF ANTENNA FOR FAST WAVE CURRENT DRIVE

用于快波电流驱动的行波 ICRF 天线的开发

• 批准号: 10480104
• 负责人: SAIGUSA Mikio
• 金额: $ 0.38万
• 依托单位: IBARAKI UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10480104/
• 关键词: tokamak; fusion; FWCD; traveling wave; antenna; surface mode; beat wave; Ponderomotive potential; 速波; 電流駆動; JFT-2M; プラズマ

New type traveling wave antennas for Fast Wave Current Drive (FWCD) have been investigated for thermonuclear fusion reactor. Antenna-plasma coupling code has been improved for two types of traveling wave antennas which are "comb line antenna" and "spiral antenna". From the calculation results, it appears that the harmful surface modes can be suppressed only for the spiral antenna, because the antenna current profile is traveling wave in both of the toroidal and poloidal directions. RF properties of spiral antenna have been investigated using mock-up antenna. The measured electromagnetic profiles around antenna agree with the designed values. At last, the phenomena of fast wave propagation in tokamak plasma is investigated by using the Ponderomotive potential of beat wave generated from two frequency fast waves in JFT-2M. Heavy ion beam probe (HIBP) firstly succeeds in detecting the fluctuations of Ponderomotive potential produced by beat wave.

用于热核聚变反应堆的快波电流驱动（FWCD）新型行波天线已被研究。针对“梳状线天线”和“螺旋天线”两种行波天线，改进了天线-等离子体耦合码。从计算结果来看，只有螺旋天线才能抑制有害表面模式，因为天线电流分布在环形和极向方向上都是行波。使用模型天线研究了螺旋天线的射频特性。测量的天线周围的电磁分布与设计值一致。最后，利用JFT-2M中两频快波产生的拍波的有质动力势，研究了托卡马克等离子体中快波的传播现象。重离子束探针（HIBP）首次成功探测到拍波产生的有质动力势的波动。