Abstract
Recent intense beam experiments in microwave radiation are considered within the context of strong turbulence theory of the beam-plasma instability. A weak turbulence model for radiation at the plasma fundamental gives qualitatively correct power levels and suggests that the radiation itself is an important dynamical entity in the beam-plasma instability. Radiation in the region ω∼2ωp is weak, in agreement with experiment. Plasma inhomogeneities in the experiment of size approximately 0.3 cm can explain the low-frequency emission power level, and its dependence on the plasma density and external magnetic field. Understanding these processes may lead to use of radiation as a versatile diagnostic measurement of beam-plasma systems.
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