Effects of helium massive gas injection level on disruption mitigation on EAST

• 作者: Abdullah ZAFAR Ping ZHU Ahmad ALI Shiyong ZENG Haolong LI
• 来源期刊: 等离子体科学和技术（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: MAGNETICALLY CONFINED PLASMA
• 页码范围: 31-38
• 页数: 8页
• 语种: 英文

摘要

In this study,NIMROD simulations are performed to investigate the effects of massive helium gas injection level on the induced disruption on EAST tokamak.It is demonstrated in simulations that two different scenarios of plasma cooling(complete cooling and partial cooling)take place for different amounts of injected impurities.For the impurity injection above a critical level,a single MHD activity is able to induce a complete core temperature collapse.For impurity injection below the critical level,a series of multiple minor disruptions occur before the complete thermal quench.