Abstract: By the calculation of particle probability distribution function, it is found that the frequency of intermittency breakout increases at the edge of higher density plasmas. Positive and negative breakouts of intermittency are distinguished using a conditional average algorithm, indicating that positive and negative intermittency events have different space characteristics. It is also demonstrated that existence of intermittent events greatly enhances the turbulence particle transport by computing the turbulent particle transport at different gradients of fluctuating densities. At higher densities, the enhancement of intermittency roughly accounts for the increase of turbulent particle transport.

Key words: Intermittency, Turbulence, Particle transport, Skewness

摘要： 通过对粒子概率分布函数的计算，发现在高等离子体密度下边界间歇性事件的爆发频率有所增加。通过条件平均的手段，正负间歇性事件得以区分，并发现了二者在空间上的不同特征。不同密度梯度下的湍流粒子输运计算表明，间歇性事件与湍流粒子输运之间存在密切联系，间歇性事件的存在能够大大增加湍流粒子输运的大小。在高等离子体密度时，间歇性事件的强度有所增加，而与之相应地，湍流粒子输运的大小也有所增强。

关键词: 间歇性事件, 湍流, 粒子输运, 斜度