Topology of toroidal helical fields in non-circular cross-sectional tokamaks
文献类型：期刊论文
| 作者 | Zha XJ ; Zhu SZ ; Yu QQ ; Wang Y |
| 刊名 | chin. phys.
 |
| 出版日期 | 2005 |
| 卷号 | 14期号:12页码:2552 |
| 关键词 | plasma equilibrium magnetic island stochasticity |
| ISSN号 | 1009-1963 |
| 中文摘要 | the ordinary differential magnetic field line equations are solved numerically; the tokamak magnetic structure is studied on hefei tokamak-7 upgrade (ht-7u) when the equilibrium field with a monotonic q-profile is perturbed by a helical magnetic field. we find that a single mode (m, n) helical perturbation can cause the formation of islands on rational surfaces with q = m/n and q = (m +/- 1, +/- 2, +/- 3,...)/n due to the toroidicity and plasma shape (i.e. elongation and triangularity), while there are many undestroyed magnetic surfaces called kolmogorov-arnold-moser (kam) barriers on irrational surfaces. the islands on the same rational surface do not have the same size. when the ratio between the perturbing magnetic field b-r(r) and the toroidal magnetic field amplitude b(phi)0 is large enough, the magnetic island chains on different rational surfaces will overlap and chaotic orbits appear in the overlapping area, and the magnetic field becomes stochastic. it is remarkable that the stochastic layer appears first in the plasma edge region. |
| 收录类别 | EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000233836300029 |
| 公开日期 | 2009-09-18 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/238]  |
| 专题 | 上海光学精密机械研究所_强场激光物理国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Zha XJ,Zhu SZ,Yu QQ,et al. Topology of toroidal helical fields in non-circular cross-sectional tokamaks[J]. chin. phys.,2005,14(12):2552, 2559. |
| APA | Zha XJ,Zhu SZ,Yu QQ,&Wang Y.(2005).Topology of toroidal helical fields in non-circular cross-sectional tokamaks.chin. phys.,14(12),2552. |
| MLA | Zha XJ,et al."Topology of toroidal helical fields in non-circular cross-sectional tokamaks".chin. phys. 14.12(2005):2552. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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