Collisional absorption and emission of longitudinal waves in a one-species, one-dimensional plasma are investigated by numerical experiments. The theory of Birmingham, Dawson, and Kulsrud for longitudinal bremsstrahlung is extended to the one-dimensional case. The results of the numerical experiments are found to be in agreement with the theory. Low-frequency electric field fluctuations for long-wavelength modes are also found and are associated with the random motion of the particles.
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Dawson et al. (1969) studied this question.
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