Development of operation scenarios for plasma breakdown andcurrent ramp-up phases in JT-60SA tokamak
Development of operation scenarios for plasma breakdown andcurrent ramp-up phases in JT-60SA tokamak
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开发 JT-60SA 托卡马克等离子体击穿和电流上升阶段的操作场景
DOI：
10.1016/j.fusengdes.2015.06.138
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发表时间：
2015
影响因子：
1.7
通讯作者：
浦野創
中科院分区：
文献类型：
--
作者：
Yasunori IWAI;Hitoshi KUBO;Yusuke OHSHIMA;Hiroshi NOGUCHI;Junichi TANIUCHI;浦野創
利用TOSCA程序对JT-60 SA托卡马克等离子体击穿和电流上升阶段的运行方案进行了模拟和验证。在击穿阶段，真空室和稳定板等导电元件中的感应电流增加到600 kA的等离子体电流水平，从而增强了杂散场的强度。半预磁化和全预磁化的优化方案满足等离子体启动所需的条件。在初始等离子体中，维持等离子体位置所需的垂直磁场由外部平衡场（EF）线圈电流控制，该线圈电流补偿由于大涡电流引起的垂直场。偏滤器配置的形成条件的等离子体的磁通量和等离子体电流的组合已经得到满足，这使我们能够开发的操作方案与从限制器到偏滤器配置的平滑过渡。
The operation scenarios for plasma breakdown and current ramp-up phases in JT-60SA tokamak have been developed and verified in simulation using the TOSCA code. The induced current in the conducting elements such as vacuum vessel and stabilizing plate increases to the comparable level of plasma current of ∼600 kA during the breakdown phase and thus enhances the strength of stray field. The optimized scenarios for half and full pre-magnetization cases satisfied the conditions required for the plasma initiation. At the initial plasma, the vertical magnetic field required to sustain the plasma position was controlled by the outer equilibrium field (EF) coil currents which compensate for a vertical field due to a large eddy current. The condition for the formation of divertor configurations given by the combination of the magnetic flux for plasma and the plasma current has been satisfied which enables us to develop the operational scenarios with a smooth transition from a limiter to a divertor configuration.