| The Experiment of Modulated Toroidal Current on HT-7 and HT-6M Tokamak |
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| 作者姓名： | 毛剑珊 P.Phillips 罗家融 徐宇鸿 赵君煜 张先梅 万宝年 张守银 揭银先 吴振伟 胡立群 刘胜霞 石跃江 李建刚 HT-M＆HT- group |
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| 作者单位： | [1]InstituteofplasmaPhysics,ChineseAcademyofSciences,Hefei2230031,China [2]FusionResearchCenter,C1510UniversityofTexasatAustin.TX78712,USA |
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| 基金项目： | The project supported by the National Nature Science Foundation of China (No.10075049 and No.10275068) |
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| 摘 要： | The Experiments of Modulated Toroidal Current were done on the HT-6M tokamak and HT-7 superconducting tokamak. The toroidal current was modulated by programming the Ohmic heating field. Modulation of the plasma current has been used successfully to suppress MHD activity in discharges near the density limit where large MHD m = 2 tearing modes were suppressed by sufficiently large plasma current oscillations. The improved Ohmic confinement phase was observed during modulating toroidal current (MTC) on the Hefei Tokamak-6M (HT-6M) and Hefei superconducting Tokamak-7 (HT-7). A toroidal frequency-modulated current, induced by a modulated loop voltage, was added on the plasma equilibrium current. The ratio of A.C. amplitude of plasma current to the main plasma current △Ip/Ip is about 12% ～ 30%. The different formats of the frequency-modulated toroidal current were compared.
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| 关 键 词： | 环形流通调制 超导实验装置 托卡马克 等离子体 |
The Experiment of Modulated Toroidal Current on HT-7 and HT-6M Tokamak |
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| P.Phillips.The Experiment of Modulated Toroidal Current on HT-7 and HT-6M Tokamak[J].Plasma Science & Technology,2003,5(1):1641-1650. |
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| Authors: | PPhillips |
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| Abstract: | The Experiments of Modulated Toroidal Current were done on the HT-6M tokamak and HT-7 superconducting tokamak. The toroidal current was modulated by programming the Ohmic heating field. Modulation of the plasma current has been used successfully to suppress MHD activity in discharges near the density limit where large MHD m = 2 tearing modes were suppressed by sufficiently large plasma current oscillations. The improved Ohmic confinement phase was observed during modulating toroidal current (MTC) on the Hefei Tokamak-6M (HT-6M) and Hefei superconducting Tokamak-7 (HT-7). A toroidal frequency-modulated current, induced by a modulated loop voltage, was added on the plasma equilibrium current. The ratio of A.C. amplitude of plasma current to the main plasma current Ip/Ip is about 12% ~ 30%. The different formats of the frequency-modulated toroidal current were compared. |
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| Keywords: | modulated toroicdal current superconducting tokamak |
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