Numerical Analysis of Experiments with a Diverter on T‑15MD TOKAMAK

Tokamak T‑15MD gradually reaches the design parameters. At the moment, an important task is to obtain stable discharges with diverter configurations and a plasma current of at least 500 kA with a pulse duration at the quasi‑stationary stage of the order of 1 s. To effectively solve this problem, it is necessary to support the experiments with numerical modeling both in the interval between the experimental campaigns and directly during the campaign. The use of numerical analysis of experiments in the 2025 T‑15MD campaign made it possible to optimize plasma discharge scenarios and work out an active feedback system in relation to the vertical and horizontal displacements of the plasma column. Stable discharges were obtained with a diverter and a plasma current of ~500 kA and a duration at the quasi‑stationary stage of the order of 1 s. The paper summarizes the experimental experience and numerical calculations obtained during the spring campaign of 2025 and provides recommendations for obtaining one of the discharge scenarios with a diverter on the T‑15MD tokamak unit.