資料載入中.....
|
請使用永久網址來引用或連結此文件:
https://ir.lib.ncu.edu.tw/handle/987654321/105529
|
| 題名: | Observation of nonlinear couplings between coexisting kinetic geodesic acoustic modes in the edge plasmas of the HT-7 tokamak |
| 作者: | 陳騮;Kong, D.F.;Liu, A.D.;Lan, T.;Qiu, Z.Y.;Zhao, H.L.;Sheng, H.G.;Yu, C.X.;Chen, L.;Xu, G.S.;Zhang, W.;Wan, B.N.;Chen, R.;Ding, W.X.;Sun, X.;Xie, J.L.;Li, H.;Liu, W.D. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | Acoustics;Amplitudes;Continuums;Couplings;Nonlinearity;Plasmas;Position measurement;Tokamak devices |
| 日期: | 2013-11-01 |
| 上傳時間: | 2026-04-23 12:34:14 (UTC+8) |
| 出版者: | IOP Publishing Ltd.;IOP Publishing and International Atomic Energy Agency |
| 摘要: | 摘要： Coexisting multi-geodesic acoustic modes (GAMs), especially coexisting dual GAMs, are observed and studied through Langmuir probe arrays at the edge plasmas of the HT-7 tokamak with lithium-coated walls. The dual GAMs are named a low-frequency GAM (LFGAM) and a high-frequency GAM (HFGAM), and it is found that within the measuring range, the HFGAM propagates outwards while the LFGAM propagates both inwards and outwards with their central frequencies nearly unchanged, and both modes have maximum amplitudes at positions with radial wavenumbers close to zero; meanwhile, the two positions happen to be where the continuum GAM frequency is closest to the central frequencies of the LFGAM and the HFGAM. These characteristics are consistent with those of a kinetic GAM converted from a continuum GAM. The nonlinear couplings between the LFGAM and the HFGAM are also analysed. In this study, we observed not only the interaction between the LFGAM and the HFGAM, but also the self-coupling of the GAM with the beat frequency between them, as well as the coupling between the LFGAM and an unknown mode at ∼50 kHz. These nonlinear interactions may play important roles during the saturation process of GAMs. Additionally, amplitude correlation analyses of multi-GAMs indicate that second harmonic GAMs are probably generated from the self-interaction of fundamental GAMs.
其他題名： NF
其他題名： Nucl. Fusion
出版者： IOP Publishing and International Atomic Energy Agency
出版日期： 2013-11-01
出處： Nuclear Fusion, 2013-11, Vol.53 (11), p.113008-9
資源來源： Institute of Physics Journals
版權： 2013 IAEA, Vienna
識別號： ISSN: 0029-5515
識別號： EISSN: 1741-4326
識別號： DOI: 10.1088/0029-5515/53/11/113008
識別號： CODEN: NUFUAU |
| 顯示於類別: | [物理學系] 期刊論文
|
文件中的檔案:
| 檔案 |
描述 |
大小 | 格式 | 瀏覽次數 |
|---|
| index.html | | 0Kb | HTML | 15 | 檢視/開啟 |
|
在NCUIR中所有的資料項目都受到原著作權保護.
|
