Improved Edge Confinement due to Ion Cyclotron Radio Frequency boronization in the HT—7 Tokamak
在 HT-7 Tokamak 由于离子回旋加速器收音机频率 boronization 改进了边监禁作者机构：InstituteofPlasmaPhysicsChineseAcademyofSciencesHefei230031
出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)
年 卷 期：2003年第20卷第6期
页 面：881-884页
核心收录：
学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术]
主 题：radiofrequency Confinement EDGE PLASMAS Electric fields Electron density HT-7 TOKAMAK PHENOMENON Cyclotrons Turbulent Flow Edge of a figure or solid Tokamak devices
摘 要：The phenomena of improved edge confinement due to ion cyclotron radio frequency boronization were observed with a fast reciprocating Langmuir probe in the HT-7 tokamak. A strong shear layer of radial electric field was produced in the plasma edge region, which resulted in the formation of an edge transport barrier. Consequently, the edge profiles of electron density were steepened, and both the absolute and relative fluctuation levels were suppressed by the shearing E×B flows. Concomitant reduction of the coherence between electron density and poloidal electric field fluctuations and the change of their cross-phase resulted in turbulent particle flux dropping by more than a half at the plasma edge. This demonstrates the de-correlation effect of turbulence and its contribution to edge transport. The results presented here suggest a link between wall conditions and boundary plasma physics, especially an interaction between atomic processes and turbulence through the formation of radial electric field shear at the plasma edge.
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