The magnetic circuit structure and magnetic field configuration of LIPS-200 ion thruster capable of working steadily after performance enhancement were obtained to minimize the anode shock voltage and discharge loss by using orthogonal experimental method. Combined with the equivalent magnetic circuit method and the finite element discretization form

the magnetic field model of LIPS-200 ion thruster was established.Then the permanent magnet alternative proposals for electromagnet in specific spatial arrangements were studied.And the equivalence of alternative proposals and the effectiveness and feasibility of the simulation method were validated by comparing with the magnetic induction intensity and working performance.Results showed that the relative error of magnetic induction intensity in key points was less than 5% after magnetic field conversion

and the sensitive parameters changed in line with expectations

the design goal of magnetic circuit structure optimization and performance improvement for LIPS-200 ion thruster was well realized.