Abstract
Electron-cyclotron resonant heating (ECRH) of Tokamak plasma is examined. When plasma is heated by waves, we must consider the distribution of incident wave energy toO andX modes as the wave is incident from vacuum to the surface of plasma as well as the absorption efficiency ofO mode andX mode. Numerical calculation shows that for small incident angle, the incident energy transfers principally intoO mode when the electric fieldE i of incident wave is parallel to the incident plane, therefore it is efficient to heat the plasma byO mode. WhenE i is perpendicular to the incident plane, the energy transfers principally intoX mode and heating the plasma byX mode is efficient.
Ion-cyclotron resonant heating (ICRH) is also considered, the formula of the energy of ion-cyclotron wave absorbed by plasma is obtained.
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