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.

研究了用于热核聚变反应堆快波电流驱动的新型行波天线。对“梳状线天线”和“螺旋天线”两种行波天线的天线等离子体耦合编码进行了改进。计算结果表明，由于螺旋天线的电流分布在环向和极向两个方向上都是行波，因此只有螺旋天线才能抑制有害的表面模式。利用仿真天线对螺旋天线的射频特性进行了研究。测得的天线周围电磁分布与设计值吻合。最后，利用JFT-2M中两频快波产生的热波的有源势，研究了托卡马克等离子体中的快波传播现象。重离子束探针首次成功地探测到热波产生的有源电位波动。