Physical Interpretation of Current Start-Up by rf in WT-2 Tokamak

概要

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In order to reveal the physical mechanism of the plasma current start-up ex-periment by rf in WT-2 tokamak, a two dimensional Fokker-Planck equation,which includes qtxasilinear diffusion terms of electron cyclotron wave (ECW)and lower hybrid wave (LHW), particle and energy losses, is solved computa-tionally. The calculations show the following results; III the initial etectroncyclotron heating plasma, the applied vertical field B. cancels the toroidal drift forsome electrons which generate a current to produce the poloidal field and theelectrons are confined in an equilibrium position. The dependence of generatedcurrents on n. qualitatively agrees with experimental resutts. Further, the elec-trons, which are accelerated in the rerr>endicular direction by ECW, are pitch-angle scattered by Coulomb collision to the parallel direction and quasilinearlyinteract with LHW having high phase velocity, resulting no a toroidal currentstart-up.
社団法人日本物理学会の論文
1985-04-15