The carbon impurity particle transport in ohmic discharges on the HT-7 tokamak

• 来源期刊: 中国物理(英文版)
• 关键词: tokamak impurity particle transport diffusion coefficient convection velocity
• 年，卷（期）: 2005,（12）
• 页码范围: 2539-2545
• 页数: 7页
• 语种: 英文

摘要

The line-integrated optical measurement of impurity radiation profiles for the study of light impurity transport is performed in the HT-7 tokamak. The carbon impurity line emissivity is obtained by Abel inversion. The radial transport behaviours of carbon impurities at different central line averaged electron densities (-ne) are investigated in ohmic discharges. The diffusion coefficient Dk(r), the convection velocity Wk(r) and the total flux of the impurity densities.