In the present paper, two distinct regimes of turbulence are identified with Langmuir probe arrays in the edge plasma of the HuanLiuqi (HL)-2A tokamak plasma for the first time. The spatial and temporal characteristics of the low frequency fluctuations (LFFs) of 20-100 kHz are found in significant contrast with the high frequency ambient turbulence (HFAT) of 100 kHz or higher. In the LFF regime...
