Measurement of the plasma boundary shift and approximation of the magnetic surfaces on the IR-T1 Tokamak

in this research we measured the plasma boundary shift using array of magnetic pick- up coils on the ir- t1 tokamak. also we approximated the magnetic surfaces by an equilibrium calculation. firstly, four magnetic probes were designed, constructed, and installed on outer surface of the ir- t1 tokamak chamber and then plasma boundary displacement measured from them. on the other hand, magnetic surfaces approximated by equilibrium calculation of the grad- shafranov equation based on expansion of free functions as quadratic in flux function.