期刊
NUCLEAR FUSION
卷 61, 期 9, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1741-4326/ac189a
关键词
MHD instability; negative triangularity plasma; resistive wall mode; tokamak; numerical simulations
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [NRF-2019R1F1A1058298, NRF-2019M1A7A1A03087584]
- R&D Program of 'Development of ITER non-procurement key-technologies through the Korea Institute of Fusion Energy (KFE) - Government fund [IN1904-2]
- U.S. Department of Energy
- National Research Council of Science & Technology (NST), Republic of Korea [IN1904] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2019M1A7A1A03087584] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The axisymmetric (n=0) resistive wall mode instability in negative triangularity plasma shape is influenced by plasma characteristics and geometric effects, with higher poloidal beta leading to more instability in negative triangularity compared to positive triangularity. Non-conformal wall shapes have been found to be helpful in stabilizing the n=0 mode, unless the plasma is too close to the walls at the nulls for the opposite triangularity.
The axisymmetric (n = 0) resistive wall mode instability is numerically investigated for the negative triangularity plasma shape, which has shown several benefits in terms of improved confinement time and fusion engineering. To evaluate the shape effects, we modified a MHD instability code AVSTAB (Axisymmetric Vertical STABility), which calculates the marginally controllable elongation in a simplified feedback capability parameter. The plasma characteristics (poloidal beta and internal inductance) as well as the geometric effects (wall shape and plasma location) are important to determine the instability. In contrast to positive triangularity, the higher poloidal beta provides more instability drive for the negative triangularity because of the higher Shafranov shift and the higher elongation of the inner flux surface of the MHD equilibrium. Non-conformal wall shapes to the plasmas (positive triangularity wall and negative triangularity plasma) are found to be rather helpful to stabilize the n = 0 mode, unless the plasma is too close to the walls at the nulls for the opposite triangularity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据