研究了在JT-60U运行参数下的α诱发的环向阿尔芬本征模(αTAE),由其实验数据得到了s和α的径向剖面(s=rdq/qdr,2 q R d/dr)。发现存在α极大值,尤其是在反剪切等离子体和高性能位形下。这证实了托卡马克中存在αTAE的全域捕获条件。在...研究了在JT-60U运行参数下的α诱发的环向阿尔芬本征模(αTAE),由其实验数据得到了s和α的径向剖面(s=rdq/qdr,2 q R d/dr)。发现存在α极大值,尤其是在反剪切等离子体和高性能位形下。这证实了托卡马克中存在αTAE的全域捕获条件。在现行托卡马克中发现了多支αTAE。此外,还考察了在中性束注入实验过程中αTAE随时间的变化特性。展开更多
当前的磁约束聚变装置常常运行在先进托卡马克区域内,先进托卡马克区域内存在负磁剪切。在JET(Joint European Torus)装置运行的参数域里,存在有约束在引发气球模驱动的势井里的多支离散阿尔芬本征模。类似于正剪切的情况,这些离散阿尔...当前的磁约束聚变装置常常运行在先进托卡马克区域内,先进托卡马克区域内存在负磁剪切。在JET(Joint European Torus)装置运行的参数域里,存在有约束在引发气球模驱动的势井里的多支离散阿尔芬本征模。类似于正剪切的情况,这些离散阿尔芬本征模只有很小的耗散率。由于耗散率很小,所以很容易被高能量粒子激发成不稳定性模式。在实验上已经观察到了很多阿尔芬频谱,这种离散阿尔芬本征模式是一种去理解这些现象的潜在的物理机制。展开更多
Discrete Alfven eigenmodes in steady-state operation scenarios with negative magnetic shear in the international thermonuclear experimental reactor are investigated in this paper. These magnetohydrodynamic eigenmodes ...Discrete Alfven eigenmodes in steady-state operation scenarios with negative magnetic shear in the international thermonuclear experimental reactor are investigated in this paper. These magnetohydrodynamic eigenmodes are trapped by the s-induced potential wells along the magnetic field line. Here α = -q2Rdβ/dr with q being the safety factor, the ratio between plasma and magnetic pressures, and R the major radius, and r the minor radius. Due to negligible continuum damping via wave energy tunneling, these Alfven eigenmodes could be readily destabilized by energetic particles.展开更多
文摘研究了在JT-60U运行参数下的α诱发的环向阿尔芬本征模(αTAE),由其实验数据得到了s和α的径向剖面(s=rdq/qdr,2 q R d/dr)。发现存在α极大值,尤其是在反剪切等离子体和高性能位形下。这证实了托卡马克中存在αTAE的全域捕获条件。在现行托卡马克中发现了多支αTAE。此外,还考察了在中性束注入实验过程中αTAE随时间的变化特性。
文摘当前的磁约束聚变装置常常运行在先进托卡马克区域内,先进托卡马克区域内存在负磁剪切。在JET(Joint European Torus)装置运行的参数域里,存在有约束在引发气球模驱动的势井里的多支离散阿尔芬本征模。类似于正剪切的情况,这些离散阿尔芬本征模只有很小的耗散率。由于耗散率很小,所以很容易被高能量粒子激发成不稳定性模式。在实验上已经观察到了很多阿尔芬频谱,这种离散阿尔芬本征模式是一种去理解这些现象的潜在的物理机制。
基金supported by the National Natural Science Foundation of China (Grant No.10675037)
文摘Discrete Alfven eigenmodes in steady-state operation scenarios with negative magnetic shear in the international thermonuclear experimental reactor are investigated in this paper. These magnetohydrodynamic eigenmodes are trapped by the s-induced potential wells along the magnetic field line. Here α = -q2Rdβ/dr with q being the safety factor, the ratio between plasma and magnetic pressures, and R the major radius, and r the minor radius. Due to negligible continuum damping via wave energy tunneling, these Alfven eigenmodes could be readily destabilized by energetic particles.
