| The carbon impurity ohmic discharges on particle transport in the HT-7 tokamak |
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| 作者姓名： | 周倩 万宝年 吴振伟 黄娟 |
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| 作者单位： | Institute of Plasma Physics, Chinese Academy of Sciences Hefei 230031, China;Institute of Plasma Physics, Chinese Academy of Sciences Hefei 230031, China;Institute of Plasma Physics, Chinese Academy of Sciences Hefei 230031, China;Institute of Plasma Physics, Chinese Academy of Sciences Hefei 230031, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No 10235010). |
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| 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 ions Fk decrease with the increase of ne, which shows a reduction in the impurity particle transport at higher electron densities.
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| 关 键 词： | 托卡马克装置 掺杂粒子传输 扩散系数 速度对流 等离子物理 |
| 收稿时间： | 2005-03-18 |
| 修稿时间： | 8/8/2005 12:00:00 AM |
The carbon impurity particle transport in ohmic discharges on the HT-7 tokamak |
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| Zhou Qian,Wan Bao-Nian,Wu Zhen-Wei and Huang Juan.The carbon impurity ohmic discharges on particle transport in the HT-7 tokamak[J].Chinese Physics B,2005,14(12):2539-2545. |
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| Authors: | Zhou Qian Wan Bao-Nian Wu Zhen-Wei and Huang Juan |
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| Institution: | Institute of Plasma Physics, Chinese Academy of Sciences Hefei 230031, China |
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| Abstract: | 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 \overline {n_\e} are investigated in ohmic discharges.
The diffusion coefficient D_{k}(r), the convection velocity W_{k}(r) and
the total flux of the impurity ions \Ga _{k} decrease with the
increase of \overline {n_\e} , which shows a reduction in the impurity
particle transport at higher electron densities. |
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| Keywords: | tokamak impurity particle transport diffusion coefficient convection velocity |
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