Research on control of periodical collapse at edge transport barrier

通过实验对比，研究了边缘输运势垒处边缘局域模式的主动和被动控制方法。在小elm作为被动控制的研究中，对获得小elm的条件进行了比较。然后，揭示了不同类型的小elm可以根据边缘碰撞的值而得到。在主动控制方面，证实了在边缘等离子体区域局部注入电子回旋波或低混合波可以提高ELM频率。

Active and passive control methods of Edge Localized Modes (ELMs) at the edge transport barrier have been investigated through comparative experiments using some devices. In the research of small ELMs as a passive control, conditions to obtain small ELMs have been compared. Then, it is revealed that the different type of small ELMs can be obtained depending on the value of the edge collisionality. As for an active control, it is confirmed that the localized injection of the electron cyclotron wave or the lower-hybrid wave to the edge plasma region can increase the ELM frequency.