Maximizing Absorption In Ion Cyclotron Heating Of Tokamak Plasmas
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Maximizing Absorption in Ion-cyclotron Heating of Tokamak Plasmas
Author | : |
Publisher | : |
Total Pages | : |
Release | : 1991 |
Genre | : |
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Efficient ion-cyclotron heating in tokamak plasmas is effectively localized in the central region of the plasma, near the ion second-harmonic layer in a single ion species plasma, or near the ion-ion hybrid layer in a plasma containing a minority ion species. The fast Alfven wave (FAW), which carries the incident rf power, from the low magnetic-field side, is generally focused in (by antenna design and propagation) toward this central region on the equatorial plane of the tokamak plasma. There the FAW encounters a "coupling" region and may undergo reflection (R), transmission(T)-to the high magnetic field side, mode conversion (C)-to an ion-Bernstein wave (IBW), and kinetic dissipation (D)-due to Doppler-shifted ion-cyclotron damping. (Here we ignore electron TTMP and/or Landau damping; these can be readily included by expanding on our formalism.) To determine these power transfer coefficients (R, T, C and D) the problem is in general formulated as an integro-partial-differential equation based upon the linearized Vlasov-Maxwell equations for an inhomogenous plasma. This is however difficult to solve, even numerically, and has been usually approximated by a fourth or sixth-order o.d.e. description which is amenable to numerical integration.
Radio-frequency Heating and Propagation in Tokamak Plasmas in the Ion Cyclotron Range of Frequencies
Author | : Tak Kuen Mau |
Publisher | : |
Total Pages | : 318 |
Release | : 1977 |
Genre | : High temperature plasmas |
ISBN | : |
Generation of Plasma Rotation in a Tokamak by Ion-Cyclotron Absorption of Fast Alfven Waves
Author | : F. W. Perkins |
Publisher | : |
Total Pages | : 8 |
Release | : 2000 |
Genre | : Magnetohydrodynamic waves |
ISBN | : |