Microwave scattering has been observed from large-amplitude ion waves in a Cs plasma. The ion wave frequency was 24 kHz. The density fluctuations were 10% of the plasma density, which was approximately 4×{}10⁹ cm^-3. An "average" cross section has been obtained for the observed scattering. The result is of the order of 10^-14 cm². Such a large value of the cross section is due to the high level of excitation of the ion wave. In the present experiment nonlinear effects play an important role.
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M. Iannuzzi (1966) studied this question.
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