The determination of plasma radial Shafranov shift (ΔR) and vertical shift (ΔZ) experimentally using magnetic probe and flux loop method for SST-1 tokamak

The Radial Shafranov shift (ΔR) and Vertical Shift (ΔZ) has been calculated for steady state Superconducting tokamak (SST-1) experimentally using magnetic probes and Flux loops. The SST-1 plasma at the present phases of operations is circular in shape and leans against the limiters. The Radial and vertical shift formulated from Shafranov equation have been used for computation. Flux loops and magnetic probes are used according to machine geometries for ΔR and ΔZ measurements. The results obtained from these two methods for numerous numbers of shots for SST-1 campaigns are found to be in good agreement, repeatable and reliable. Since the control of plasma position plays an important role in plasma confinement and optimized tokamak operations, this mentioned methodology and results (ΔR, ΔZ as control parameter) could later be used as a plasma position feedback control in long duration SST-1 plasma experiments. (author)