The Formation and Stationary Maintenance of Peaked Pressure Profiles in Turbulent Tokamak Plasmas

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The theoretical model for increasing peaking of radial distribution of plasma thermal energy and plasma energy confinement time improvement due to the formation of current profiles those provide the increased value of the safety factor qb at the outer plasma boundary is considered. The model for the formation and stationary maintenance of the peaked current density profiles those ensure the maintenance of plasma column equilibrium state with increased qb value and conservation of q0=1 at the magnetic axis is developed. The model is based on the significant ramp down of the Iind current maintained by the inductor with simultaneous central ECR heating and electron cyclotron current drive (ECCD) switching on. It is shown by the computer simulations of the self-consistent time evolution of turbulent plasma for the conditions of T-10 and T-15MD tokamaks that in the shot scenarios with three- or four-fold decrease in the Iind current at the ECRH stage of shots it was achieved an approximately two-fold enhancement of the electron and ion temperatures at the axis of the plasma column as compared to the standard shots with the same heating powers.

作者简介

V. Pastukhov

National Research Centre “Kurchatov Institute”

Email: Pastukhov_VP@nrcki.ru
123098, Moscow, Russia

D. Smirnov

National Research Centre “Kurchatov Institute”

Email: Pastukhov_VP@nrcki.ru
123098, Moscow, Russia

N. Chudin

National Research Centre “Kurchatov Institute”

编辑信件的主要联系方式.
Email: Pastukhov_VP@nrcki.ru
123098, Moscow, Russia

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