Wave field structure and power coupling features of blue-core helicon plasma driven by various antenna geometries and frequencies  

作　　者：王超 刘佳 苌磊 卢凌峰 张世杰 周帆涛 Chao Wang;Jia Liu;Lei Chang;Ling-Feng Lu;Shi-Jie Zhang;Fan-Tao Zhou(State Key Laboratory of Power Transmission Equipment Technology,School of Electrical Engineering,Chongqing University,Chongqing 400044,China;Shanghai Institute of Space Propulsion,Shanghai 201112,China;Southwestern Institute of Physics,Chengdu 610041,China)

机构地区：[1]State Key Laboratory of Power Transmission Equipment Technology,School of Electrical Engineering,Chongqing University,Chongqing 400044,China [2]Shanghai Institute of Space Propulsion,Shanghai 201112,China [3]Southwestern Institute of Physics,Chengdu 610041,China

出　　处：《Chinese Physics B》2024年第3期480-487,共8页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.92271113);the Fundamental Research Funds for the Central Universities(Grant No.2022CDJQY-003);Chongqing Entrepreneurship and Innovation Support Program for Overseas Returnees(Grant No.CX2022004);the Fund from Shanghai Engineering Research Center of Space Engine(Grant No.17DZ2280800).

摘　　要：This paper deals with wave propagation and power coupling in blue-core helicon plasma driven by various antennas and frequencies.It is found that compared to non-blue-core mode,for blue-core mode,the wave can propagate in the core region,and it decays sharply outside the core.The power absorption is lower and steeper in radius for blue-core mode.Regarding the effects of antenna geometry for blue-core mode,it shows that half helix antenna yields the strongest wave field and power absorption,while loop antenna yields the lowest.Moreover,near axis,for antennas with m=+1,the wave field increases with axial distance.In the core region,the wave number approaches to a saturation value at much lower frequency for non-blue-core mode compared to blue-core mode.The total loading resistance is much lower for blue-core mode.These findings are valuable to understanding the physics of blue-core helicon discharge and optimizing the experimental performance of blue-core helicon plasma sources for applications such as space propulsion and material treatment.

关 键 词：helicon plasma helicon wave helicon discharge radio frequency plasma source 

分 类 号：O53[理学—等离子体物理]