Results of experimental study on the control of the plasma filament position in the Tuman-3 - tokamak with adiabatic compression

Results of experimental study on control of the plasma filament position in the ''Tuman-3'' adiabatic-compression tokamak are given. The control system of the vertical plasma filament position consists of two circuits. The system provides the 10 Gs/ms field growth rate on the plasma current front and 57 Gs/ms on the plateau. The control system of the horizontal plasma filament position consists of a capacitor battery (400 V, 2.5 kA, 600 kJ), a vertical field fast winding, a filament position measurement system. The maximum winding field is 90 Gs. The 1 to 1.5 cm displacement to the magnetic surface centre is shown to correspond to optimum operating conditions of the tokamak. The experimental results testifying to the correlation between the ion tempe-- rature and filament displacement are obtained at (7 to 8)x1012 cm-3 plasma concentration under ohmic heatina conditions. While operating with pUlsed gas injection, the plasma confinement, near the point shifted inside by 1 to 1.5 cm, favours attaining operating modes at a higher concentration. At approximately 3 to 4 cm displacements the impurity level growth is observed