Wave propagation and power deposition in blue-core helicon plasma
文献类型：期刊论文
| 作者 | Chang, L.2,3; Caneses, J. F.4; Thakur, S. C.1 |
| 刊名 | FRONTIERS IN PHYSICS
 |
| 出版日期 | 2022-10-06 |
| 卷号 | 10 |
| ISSN号 | 2296-424X |
| 关键词 | helicon plasma blue-core wave propagation power deposition wave guide |
| DOI | 10.3389/fphy.2022.1009563 |
| 通讯作者 | Chang, L.(leichang@cqu.edu.cn) |
| 英文摘要 | The wave propagation and power deposition inside and outside the blue-core helicon plasma are computed, together with their transitional behaviours prior to and after the blue-core formation. Computations refer to the experiments on the CSDX (controlled shear decorrelation experiment) (Thakur et al., Plasma Sources Science and Technology 23: 044,006, 2014 and Thakur et al., IEEE Transactions on Plasma Science 43: 2754-2759, 2015). It is found that the radial profile of wave electric field peaks off-axis during the blue-core formation, and the location of this peak is very close to that of particle transport barrier observed in experiment; the radial profile of wave magnetic field shows multiple radial modes inside the blue-core column, which is consistent with the experimental observation of coherent high m modes through Bessel function. The axial profiles of wave field indicate that the decay length shortens for increased external field strength, especially when the blue-core mode has been achieved, and this length is relatively longer inside the core than that outside. The wave energy density is overall lower in two orders after blue-core formation than that prior to, and the energy distribution shows a periodic boundary layer near the edge of blue-core column. The dispersion relation inside the blue-core column suggests the presence of two radial modes, while outside the blue-core column it shows no variation, i.e. constant wave number with changed frequency. The power deposition appears to be off-axis in the radial direction, forming a hollow profile, and when the blue-core mode has been formed it shows periodic structure in the axial direction. Analyses based on the step-like function theory and introduced blue-core constant provide consistent results and more physics understanding. These details of wave propagation and power deposition during the blue-core formation are presented for the first time, and helpful for understanding the mechanism of blue-core phenomenon. The equivalence of blue-core plasma column to optical fiber for electromagnetic communication is also explored, and preliminary calculation shows that total reflection can indeed occur if the incident angle is larger than a threshold value. This may inspire a novel application of helicon plasma, and is one of the most interesting findings of present work. |
| WOS关键词 | MODES ; FIELD |
| 资助项目 | Chinese Academy of Sciences ``100? Talent Program ; Science Foundation of Institute of Plasma Physics[Y35QT1089R] ; Fundamental Research Funds for the Central Universities[DSJJ-2020-07] ; Chongqing Entrepreneurship and Innovation Support Program for Overseas Returnees[2022CDJQY-003] ; [cx2022004] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | FRONTIERS MEDIA SA |
| WOS记录号 | WOS:000883774000001 |
| 资助机构 | Chinese Academy of Sciences ``100? Talent Program ; Science Foundation of Institute of Plasma Physics ; Fundamental Research Funds for the Central Universities ; Chongqing Entrepreneurship and Innovation Support Program for Overseas Returnees |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/130138]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Chang, L. |
| 作者单位 | 1.Auburn Univ, Dept Phys, Auburn, AL USA 2.Chinese Acad Sci, Inst Plasma Phys, HFIPS, Hefei, Peoples R China 3.Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Sec, Chongqing, Peoples R China 4.CompX, Del Mar, CA USA |
| 推荐引用方式 GB/T 7714 | Chang, L.,Caneses, J. F.,Thakur, S. C.. Wave propagation and power deposition in blue-core helicon plasma[J]. FRONTIERS IN PHYSICS,2022,10. |
| APA | Chang, L.,Caneses, J. F.,&Thakur, S. C..(2022).Wave propagation and power deposition in blue-core helicon plasma.FRONTIERS IN PHYSICS,10. |
| MLA | Chang, L.,et al."Wave propagation and power deposition in blue-core helicon plasma".FRONTIERS IN PHYSICS 10(2022). |
入库方式： OAI收割
来源：合肥物质科学研究院
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