EXPERIMENTAL INVESTIGATION ON ELECTRON CYCLOTRON ABSORPTION AT DOWN-SHIFTED FREQUENCY IN THE PLT TOKAMAK
The absorption of 60 GHz cyclotron waves, with the extraordinary mode and an oblique angle of propagation, has been investigated in the PLT Tokamak in the regime of downshifted frequency. The production of energetic electrons, with energies of up to 300 to 400 keV, peaks at values of the toroidal field (approximately equal29 kG) for which the wave frequency is significantly smaller than the electron cyclotron frequency in the whole plasma region. The observations are consistent with the predictions of the relativistic theory of electron cyclotron damping at down shifted frequency. Existing RF sources make this process a viable method for assisting the current rampup and for heating the plasma of present large Tokamaks.
Bibliographic Reference: NUCLEAR FUSION, VOL. 26 (1986), NO. 9, PP. 1165-1169
Record Number: 1989126009600 / Last updated on: 1988-02-01
Available languages: en