A Dip Structure in the Intrinsic Toroidal Rotation Near the Edge of the Ohmic Plasmas in EAST
文献类型：期刊论文
| 刊名 | PLASMA SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2011 |
| 卷号 | 13 |
| 关键词 | H-MODE TRANSITION ION ORBIT LOSS TOKAMAK PLASMA ELECTRIC-FIELD TRANSPORT CONFINEMENT TURBULENCE BOUNDARY SYSTEMS DRIVEN intrinsic rotation turbulent Reynolds stress toroidal torques neutral friction |
| ISSN号 | 1009-0630 |
| 其他题名 | A Dip Structure in the Intrinsic Toroidal Rotation Near the Edge of the Ohmic Plasmas in EAST |
| 英文摘要 | Ion's toroidal velocity, v(t), in both the outermost 4 cm of the confined region and the scrap-off layer of Ohmic L-mode plasmas in EAST was measured using Mach probes. At about 1 cm inside the separatrix a local minimum in v(t) was observed, from which a cocurrent rotation increased both inwards and outwards. The radial width of the -v(t) dip was 1 cm to 2 cm, and both the density and electron temperature profiles exhibited steep gradients at this dip position. It was observed in both divertor and limiter configurations. To find out its origin, the toroidal torques induced by neutral friction, neoclassical viscosity, collisional perpendicular shear viscosity, ion orbit loss and turbulent Reynolds stress were estimated using the measured parameters. Our results indicate that in this particular parameter regime the neutral friction was the dominant damping force. The calculated cocurrent toroidal torque by the neoclassical viscosity dominates over those from the collisional perpendicular shear viscosity, ion orbit loss and turbulent Reynolds stress. These results are potentially important for the understanding of boundary conditions for the intrinsic toroidal momentum in tokamak plasmas. |
| 资助项目 | [National Natural Science Foundation of China] ; [ITER project of China] |
| 语种 | 英语 |
| CSCD记录号 | CSCD:4309828 |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/51648]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 推荐引用方式 GB/T 7714 | . A Dip Structure in the Intrinsic Toroidal Rotation Near the Edge of the Ohmic Plasmas in EAST[J]. PLASMA SCIENCE & TECHNOLOGY,2011,13. |
| APA | (2011).A Dip Structure in the Intrinsic Toroidal Rotation Near the Edge of the Ohmic Plasmas in EAST.PLASMA SCIENCE & TECHNOLOGY,13. |
| MLA | "A Dip Structure in the Intrinsic Toroidal Rotation Near the Edge of the Ohmic Plasmas in EAST".PLASMA SCIENCE & TECHNOLOGY 13(2011). |
入库方式： OAI收割
来源：合肥物质科学研究院
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