氢、氩柱状等离子体天线在非均匀磁场中的辐射特性研究  

Study on Radiation Characteristics of Cylindrical Hydrogen and Argon Plasma Antennas under Inhomogeneous Magnetic Field

作　　者：潘光祖 杜丹[2] 周华 杨开建 乔冠瑾 胡少雄 姚卫博 龚学余[1] PAN Guangzu;DU Dan;ZHOU Hua;YANG Kaijian;QIAO Guanjin;HU Shaoxiong;YAO Weibo;GONG Xueyu(Department of Nuclear Science and Technology,University of South China,Hengyang,Hunan 421001,China;Department of Mathematics and Physics,University of South China,Hengyang,Hunan 421001,China;Institute of Plasma Physics,Chinese Academy of Sciences,Hefei,Anhui 230031,China;Department of Electrical Engineering,University of South China,Hengyang,Hunan 421001,China)

机构地区：[1]南华大学核科学技术学院,湖南衡阳421001 [2]南华大学数理学院,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]南华大学电气工程学院,湖南衡阳421001

出　　处：《计算物理》2024年第3期334-344,共11页Chinese Journal of Computational Physics

基　　金：国家自然科学基金(11205086);国家留学基金项目(202108430056);国家磁约束核聚变能发展研究专项(2022YFE03070003);湖南省自然科学基金(2020JJ4515);湖南省教育厅重点项目(20A432);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)资助。

摘　　要：在非均匀磁场条件下建立氢、氩等离子体天线的二维轴对称模型,在低压条件下根据COMSOL软件计算结果对比分析磁场分布对单极柱状氢、氩等离子体天线辐射方向图、电子密度分布和增益性能的影响。当其他条件一定时,模拟结果表明:1)调控磁场和波频可控制氢、氩等离子体天线的辐射方向,在特定波频,氢、氩等离子体天线方向性好,副瓣小,通过调控磁场分布可在保持方向性不变的条件下提高氢、氩等离子体天线的增益;2)氩等离子体天线电子密度分布受磁场分布的影响比氢等离子体天线的大,氩等离子体天线电子密度分布不均匀,而氢等离子体天线电子密度相对均匀;3)磁场分布对氩等离子体天线增益的影响比氢等离子体天线的大,磁场主要分布在阳极附近时,氢等离子体天线增益大于氩等离子体天线,阴极附近磁场强度逐渐增加时,氩等离子体天线增益远大于氢等离子体天线。In this paper,two-dimensional axisymmetric model of hydrogen and argon plasma antenna is established under nonuniform magnetic field conditions,and the effects of magnetic field distribution on electron density distribution,radiation direction map and gain performance of monopole columnar hydrogen and argon plasma antenna are compared and analyzed under low pressure conditions based on COMSOL calculation results.The results show that under certain conditions:1)The electron distribution of argon plasma antenna is more affected by the magnetic field than that of hydrogen plasma antenna.The electron density distribution of argon plasma antenna is inhomogeneous,while that of hydrogen plasma antenna is relatively uniform.2)The radiation direction of the hydrogen and argon plasma antenna can be controlled by adjusting the magnetic field and wave frequency.At some specific wave frequencies,the hydrogen and argon plasma antenna have good directivity with small side lobe.Moreover,gain of hydrogen and argon plasma antenna can be improved by changing the magnetic field distribution while maintaining their directivity.3)The influence of the magnetic field distribution on the gain of the argon plasma antenna is greater than that of the hydrogen plasma antenna.When the magnetic field is mainly near the anode,the gain of the hydrogen plasma antenna is greater than that of the argon plasma antenna.As the magnetic field strength near the cathode increases gradually,the gain of argon plasma antenna is much larger than that of hydrogen plasma antenna.

关 键 词：氢等离子体天线 氩等离子体天线 辐射方向 天线增益 

分 类 号：O539[理学—等离子体物理]