Y. Tatematsu et al., Cyclotron emission spectra from collisionless electrons resonantly heated by cyclotron waves in a magnetic mirror, FUSION ENG, 53, 2001, pp. 229-236
The frequency spectrum of cyclotron emission resonantly heated electrons in
a magnetic mirror is investigated. In an experiment, a very strong emissio
n is observed in a narrow frequency band just higher than the frequency of
a heating wave, in addition to radiation with a broad frequency spectrum. T
he cyclotron emission spectrum from resonantly heated electrons is theoreti
cally calculated with a velocity distribution of electrons bouncing in a ma
gnetic mirror and experiencing multiple heating. The calculation shows that
the observed narrow spectrum is attributed to cyclotron emission from heat
ed electrons that are magnetically reflected and accumulated within a narro
w region around the resonant heating layer. (C) 2001 Elsevier Science B.V.
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