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Measurements are presented of fluctuating millimeter-wave radiation from the Alcator tokamaks. Its characteristics are (1) rapid modulation, approaching 100% with rise time 3–4 μsec, (2) very narrow line width, <5 GHz at the plasma frequency, and (3) extremely large intensity, up to 200 times thermal. These characteristics distinguish this radiation from the steady ωpe emission previously documented and are interpreted as indicating nonlinear conversion of electrostatic oscillations as the origin of the radiation.
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Hutchinson et al. (1980) studied this question.
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