The excitation of upper‐hybrid wake electrostatic wave by interaction of an extraordinary Gaussian wave propagating perpendicular to the external magnetic field in a cold homogeneous plasma is investigated using magnetohydrodynamics theory. The plasma oscillations can be excited due to the charge separation appeared by the ponderomotive force of the electromagnetic wave whose frequency is considered in the lower pass band. By obtaining the equation governing the plasma wake, the dependency of the wake amplitude on the physical parameters is studied. It is observed that larger wake oscillation takes place when the pulse length is approximately close to 3λ_p/π and the X‐wave frequency is greater than ω_p, which means that the phase velocity is less than the speed of light in vacuum (v_p < c).

中文翻译：

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低频非凡电磁波激励上混合等离子体尾波

利用磁流体动力学理论研究了在冷均质等离子体中垂直于外部磁场传播的非正常高斯波的相互作用对上混合唤醒静电波的激发。由于在频率较低的通带中考虑频率的电磁波的合磁力引起的电荷分离，因此可以激发等离子体振荡。通过获得控制等离子体苏醒的方程式，研究了苏醒振幅对物理参数的依赖性。可以观察到，较大的唤醒振荡发生时，脉冲长度大约为接近3 λ _p / π和X波频率大于ω _p，这意味着相速度小于真空中的光速（v _p  <  c）。