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The generation of radio noise by plasma oscillations is studied, making use of the collisionless Boltzmann equation to describe the electron component of the plasma. A second-order perturbation calculation is performed to determine the power spectrum for radiation at the second harmonic of the plasma frequency in a hot plasma in which there is no external magnetic field and the ions are of uniform density.
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T. J. M. Boyd (1964) studied this question.
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