极向磁场对电子回旋频段的O-SX模式转换过程的影响  

Effect of Poloidal Magnetic Field on O-SX Mode Conversion in the Electron Cyclotron Range of Frequencies

作　　者：殷志洋 杜丹[1] 龚学余[2] 贾国章 郑平卫 YIN Zhiyang;DU Dan;GONG Xueyu;JIA Guozhang;ZHENG Pingwei(School of Mathematics and Physics,University of South China,Hengyang,Hunan 421001,China;School of Nuclear Science and Technology,University of South China,Hengyang,Hunan 421001,China;Institute of Plasma Physics,Chinese Academy of Sciences,Hefei,Anhui 230031,China;School of Resource Environment and Safety Engineering,University of South China,Hengyang,Hunan 421001,China)

机构地区：[1]南华大学数理学院,湖南衡阳421001 [2]南华大学核科学技术学院,湖南衡阳421001 [3]中国科学院等离子体物理研究所,安徽合肥230031 [4]南华大学资源环境与安全工程学院,湖南衡阳421001

出　　处：《南华大学学报（自然科学版）》2020年第2期1-7,共7页Journal of University of South China：Science and Technology

基　　金：国家自然科学基金项目(11205086,11675073);湖南省核聚变与等离子体物理创新团队建设项目(NHXTD03);湖南省核聚变国际科技创新合作基地项目(2018WK4009);衡阳市重点实验室项目(2018KJ108);南华大学核燃料循环技术与装备湖南省协同创新中心开放基金项目(2019KFY23,2019KFZ10)。

摘　　要：采用全波法和冷等离子体模型,探讨了极向磁场对电子回旋频段的寻常模到非寻常模转换过程的影响,研究结果表明,在Ny=0的情况下,天线发射的电子回旋波在等离子体中传播时,极向磁场的存在会导致消逝区一直存在,因此无法达到100%的模式转换。并且,随着等离子体中极向磁场强度的增大,转换效率将会迅速下降,最佳环向折射系数也将随之增大。After using the full-wave method and the cold plasma model,the influence of the poloidal magnetic field on the conversion process from ordinary mode to extraordinary-mode in the electron cyclotron range of frequencies has been discussed.The results show that in the case of N y=0,when the electron cyclotron wave emitted by the antenna propagates in the plasma,the presence of the poloidal magnetic field will cause the region of evanescence to exist all the time,so the mode conversion of 100%can’t be achieved.Moreover,as the intensity of the poloidal magnetic field in the plasma increases,the conversion efficiency will decrease rapidly and the optimum toroidal refraction coefficient will also increase.

关 键 词：极向磁场 冷等离子体 模式转换 转换效率 最佳环向折射系数 

分 类 号：O53[理学—等离子体物理]