Calculation of quasistatic magnetic fields of tokamaks by the surface currents method

Numerical and analytical method for simulation of axially-symmetric magnetic field of thermonuclear reactors with ferromagnetic cores is developed. ''Surface currents'', which are simulated by thin rectangular coils, are set to take into account real boundary conditions on the inner magnetic core surface. Advantages of the method consists in small counting time and possibility of qualitative analysis of a field structure. Comparison of experimental and calculational values of magnetic field induction conducted for tokamaks with ferromagnetic cores both with a rod and without it has revealed that the data are in a good agreement for a magnetic core plane. In calculations for the plane perpendicular to a magnetic core plane it is necessary to change the calculational model increasing dimensions up to the magnetic core side yoke