A possibility of calculation of magnetic surface function grdient and related quantities

A calculation method for gradient of magnetic surface functions ∇Ψ based on the solution of the standard linear differential equation system with variable coefficients is considered. The system described the behaviour of space derivatives of magnetic surface functions along the magnetic line of force. Computer-aided design of ∇Ψ in torsatron magnetic fields as well as the examples of application of calculational results of ∇Ψ when calculating the standard to the magnetic surface component of drift rate of charged particles and equilibrium currents in the plasma with low gas-kinetic pressure are given