Magnetic Sensing of Azimuthal Current in Hall Thrusters: In-Flight Diagnostic Potential

In this paper, the method of Hall current spatial structure estimation based on the measurements of steady-state magnetic fields induced by this current outside the acceleration channel is proposed. The approach to Hall current structure determination is based on the inverse magnetostatic problem solution using two-dimensional constrained regularization. The optimal number and positions of magnetic sensors are determined, and the solutions using simulated measurements with and without simulated noise are obtained. [PUBLISHER ABSTRACT]