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Abstract
In turbulent wakes, mixing between the turbulent inner wake and the outer inviscid wake gives rise to the intermittency phenomenon. It is shown that electron density fluctuations of a turbulent nature, in addition to those caused by turbulence, will be produced by the intermittency phenomenon.
Two contributions to the scattering cross-section are obtained. The first one arises from the intermittency phenomenon and vanishes if the intermittency is omitted; and the second one is due to fluctuations caused by turbulence. The second contribution also contains the intermittency effect, and reduces to that given by the conventional turbulent scattering theory when the intermittency is not considered. Consideration is also given to the intermittency effects for scattering of electromagnetic waves by hypersonic turbulent wakes for plasma. The case of scattering of electromagnetic waves from underdense and overdense plasmas is discussed in qualitative manner. The calculation for the scattering coefficients is also done for the different parameters of the turbulent plasma in different situation with suitable choice.