Local fluctuations of electrostatic potential, poloidal electric field, magnetic potential and electron density are simultaneously measured in the T-10 tokamak by a heavy ion beam probe (HIBP) having a five-slit energy analyser, which allows an estimate of the turbulent particle flux and $\boldsymbol {E}\times \boldsymbol {B}$ rotation velocity in the off-minor-axis gradient zone of the toroidal plasma column. The high spatial and temporal resolution of the modern multichannel HIBP makes it an effective tool to study plasma oscillations. Motivated by previous work that has documented time-resolved interactions between measured plasma parameters using correlation analysis (coherence of $E_{\textrm {pol}}$ and density $n_e$, and cross-phase), a new result from bicorrelation analysis (bicoherence of magnetic potential $A_\zeta$ and density $n_e$, and biphase) is reported for documenting the evidence of wave–wave coupling and energy transfer associated with the interaction between geodesic acoustic modes (GAM) and broadband, quasi-coherent modes.

静电势、极向电场、磁势和电子密度的局部波动在 T-10 托卡马克中通过具有五狭缝能量分析器的重离子束探测器 (HIBP) 同时测量，它允许估计湍流粒子通量和$\boldsymbol {E}\times \boldsymbol {B}$在环形等离子体柱的离轴梯度区域中的旋转速度。现代多通道 HIBP 的高空间和时间分辨率使其成为研究等离子体振荡的有效工具。受先前工作的启发，该工作使用相关分析（$E_{\textrm {pol}}$和密度$n_e$ 的相干性）记录了测量等离子体参数之间的时间分辨相互作用和交叉相位），报告了双相关分析（磁势$A_\zeta$和密度$n_e$和双相的双相干性）的新结果，用于记录与相互作用相关的波-波耦合和能量转移的证据测地声学模式 (GAM) 和宽带准相干模式之间。