On the Transition Regime of Nonlinear Error Field Penetration in Toroidal Plasmas

摘要

The error field penetration is numerically studied in the frame of the visco-resistive magnetohydrodynamics(MHD) model.A transition scaling is obtained to link the Rutherford and Waelbroeck regimes in the nonlinear phase of error field penetration process.Furthermore,a transition density scaling of[b_r/B_T]_(crit)~n_e^(1/2) obtained in accord with recent experimental observations in the J-TEXT tokamak.