频率调制对ICRH天线阻抗匹配的影响研究  

Influence of frequency modulation on the impedence matching of ICRH antenna

作　　者：谭清懿 龚学余[1] 杜丹[2,3] 郭征荣 

机构地区：[1]南华大学核科学技术学院,衡阳421001 [2]南华大学数理学院,衡阳421001 [3]南华大学电气学院,衡阳421001

出　　处：《核聚变与等离子体物理》2015年第2期151-155,共5页Nuclear Fusion and Plasma Physics

基　　金：国家自然科学基金资助项目(11375085;11205086;41104094);国家磁约束核聚变能发展研究专项(2014GB10 8002);高等学校博士学科点专项科研基金资助项目(20114324110001);湖南省核聚变与等离子体物理创新团队建设资助项目(NHXTD03)

摘　　要：采用三支节液态调配器使离子回旋加热(ICRH)天线系统达到阻抗匹配,在阻抗匹配的条件下结合频率调制技术来减小由天线输入阻抗变化所引起的反射功率。数值模拟了频率调制前后天线负载与反射系数的变化关系,用来验证频率调制对ICRH天线中阻抗匹配装置的影响。模拟结果表明:三支节液态调配器结合频率调制方法,能更好地降低天线传输系统的反射系数,使得发射机的功率通过天线辐射更加有效地耦合到等离子体中去。The liquid triple-stub tuner was adopted to obtain the impedance matching for antenna load of ion cyclotron resonance heating. Under the condition of impedance matching, the frequency modulation technique was used to reduce the reflected power caused by the change of antenna loading. The relationship between reflection coefficient and antenna loading before and after frequency modulation was numerically simulated to everify the effect of frequency modulation on ICRH system impedance matching device. The numerical simulation results show that the liquid triple-stub tuner combine with frequency modulation technique can better reduce the reflection coefficient of transmission system and make the RF power transit antenna radiation coupled to plasma more effectively.

关 键 词：三支节液态调配器 频率调制 反射系数 

分 类 号：TL612[核科学技术—核技术及应用]