Calculation Provision of the Discharge Scenario with Attainment of the Current Plateau at the KTM Tokamak.

The results of testing the current scenarios developed and verified by using the DINA code at the KTM tokamak during the autumn–winter campaign of 2021 are presented. The qualitative difference between the developed scenarios is an increase in the plasma current and discharge duration with a constant breakdown stage, as well as the presence of a software stage of reducing the plasma current before the discharge is completed. In addition, the technological limitations of the power supply sources of the coils and the requirement to minimize the current reversal in the control coils in the zone of near-zero currents were taken into account. The main goal of the scenarios obtained is the realization of a current plateau during the discharge with the presence of a stage of software reduction of the plasma current before the end of the discharge. The works carried out in 2021 became the next significant step toward bringing the KTM unit to design parameters. [ABSTRACT FROM AUTHOR]