The inward particle flux associated with the global long-lived mode (LLM) during the L–I–H transition on HL-2A tokamak has been measured. The inward particle flux arises from the phase change between density and radial velocity fluctuations, where density and velocity fluctuations are strongly correlated with magnetic fluctuations of LLM. Moreover, the radial velocity and its gradient rather than poloidal flow shear play an important role in particle transport associated with the large-scale mode. The strong nonlinear coupling between LLM and ambient turbulence has been confirmed, and this may contribute to most of the inward particle flux in the LLM during the I-phase state.

已经测量了在 HL-2A 托卡马克上的 L-I-H 转变期间与全局长寿命模式 (LLM) 相关的向内粒子通量。向内的粒子通量来自密度和径向速度波动之间的相变，其中密度和速度波动与 LLM 的磁波动密切相关。此外，径向速度及其梯度而不是极向流剪切在与大尺度模式相关的粒子传输中起重要作用。LLM 与环境湍流之间的强非线性耦合已被证实，这可能有助于 LLM 在 I 相状态期间的大部分向内粒子通量。