Study of High Power ICRF Antenna Design in LHD

作     者：Hiroshi KASAHARA Tetsuo SEKI Kenji SAITO Ryuhei KUMAZAWA Takashi MUTOH Goro NOMURA Fujio SHIMPO Shin KUBO Takashi SHIMOZUMA Yasuo YOSHIMURA Hiroe IGAMI Hiromi TAKAHASHI 赵燕平 Takuya OOSAKO Yuichi TAKASE 

作者机构：National Institute for Fusion Science Institute of Plasma Physics Chinese Academy of Sciences University of Tokyo 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2010年第12卷第1期

页      面：15-19页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

基　　金：supported partially by the JSPS-CAS Core-University program in the field of 'Plasma and Nuclear Fusion' 

主　　题：ICRF minority heating mode conversion heating antenna design LHD 

摘      要：In large helical device （LHD）, antenna loadings are different for minority ion cyclotron heating （MICH with 38.47 MHz） and mode-converted ion Bernstein wave heating （MC-IBW with 28.4 MHz）, and it is necessary to improve antenna loading with low heating efficiency to avoid arching on transmission line. To design a new ion cyclotron range of frequencies （ICRF） antenna in LHD, calculation for a simple antenna model is conducted using three-dimensional electrical magnetic code （high frequency structure simulator, HFSS） for an water loading as an imaginary plasma with low heating efficiency. At resonant frequencies, antenna loading is sensitive to strap width, and resonant frequencies are strongly related to strap height. There is no differences of RF current profile on the strap surface between resonant frequency and non-resonant frequency. The strap should be perpendicularly placed against the magnetic field line, since Faraday-shield angle will lead to a decrease in the effective antenna height.