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Synergetic Effects of Runaway Electron and Vertical Instability on the Wall Damage on HL-2A Tokamak
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作者 YANG Yinwei YUAN Baoshan YANG Qingwei ZHANG Yipo SONG Xianying LI Xu ZHENG Yinjia CAO Zeng 《Southwestern Institute of Physics Annual Report》 2005年第1期17-19,共3页
1 Generation of vertical instability Tokamak experiments show that the energy confinement time and performance are better, and the larger plasma current can be achieved for non-circular cross-sectional shape of plasma... 1 Generation of vertical instability Tokamak experiments show that the energy confinement time and performance are better, and the larger plasma current can be achieved for non-circular cross-sectional shape of plasma than circular cross-section. However, the external magnetic fields which are used to produce the non-circular cross sectional shape also cause the confined plasma to become unstable to small vertical displacement. In general, the ratio of elongation k is larger, the possibility of instability is more. In practice, this vertical displacement mode stabilized by feedback control system or other provided external radial magnetic field to balance out the plasma motion. Under some of situations the control system may be fail due to rapid growth rate of instability exceeding the ability of controlling. The plasma will then move vertically upwards or downwards depending upon the characteristics of instability and control failure. 展开更多
关键词 Runaway electron Vertical displacement episode(VDE) Halo current
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