The paper studies optimization of technological parameters of the coaxial magnetoplasma accelerator by varying of solenoid inductance on the basis of experimental data. Data for research were received by experimental path for the accelerator two different models which is used for double purpose. The solenoid inductance was determined on the basis calculation of the magnetic vector potential succeeded by calculation of magnetic field energy. Optimum value of inductance for two models when value of kinetic energy reaches the maximum level was determined, it influences on escape speed of plasma jet. Analysis of the solenoid inductance was made, it influences on increasing transverse velocity component, and thus, the metal erosion and amount of disperse powders. The system of second order differential equations was written down as first order differential equations for calculation accuracy increasing and was solved using the fourth-order Runge-Kutta fixed-step method. View of potential pit was simulated in software package COMSOL Multiphysics which shows spatial limitation of the plasma particles expansion and illustrates the advantages of the longitudinal and transverse components of the charged particles velocity in the plasma jet. Simulation data allow to improve technological parameters of the investigated accelerator. The test of a model for adequacy was completed by calculation energy balance for system.