Vorob'ev

pp. 181-191

pp. 188-197

The research of the influence of the excavation process of butt-end vacuum arc evaporator on the angle distribution of the evaporated material flux was carried out. Coating profile of flat extended substrate placed perpendicular the cathode surface was measured at various working duration and different extends of excavation of vacuum arc evaporator cathode. According to the obtained profiles the angle distribution of the material flux was reconstructed. The normalized dimensionless angle distribution of the material flux was formed according to various extends of cathode excavation and the comparison with distribution of flat point source according to Lambert-Knudsen law was made.

Effect of the torque in the thruster with anode layer was considered. It was shown that the mechanism of appearance of such torque is associated with the azimuthal deflection of ions in the accelerating channel of an engine as it moves in the radial magnetic field. Dependences between the angular acceleration of a device and the strength of magnetic field for different thruster’s operating modes, different working substances and mass-dimensional characteristics of the spacecraft were obtained. It was also demonstrated that this torque could have a significant impact on the stabilizing system in cases of long-time operation. The remedy for harmful influence of the azimuthal deflection of ions on the spacecraft’s rotation was proposed.

The paper considers problems of changes in tractive coefficient of efficiency of a motor with anode layer by using different working substances. The authors obtained dependences describing the effect of the azimuthal deviation to the specified coefficient of efficiency, confirmed by the results of the experiment. The authors propose assessment criteria of using different working substances to increase tractive efficiency propulsion.

This article considers experimental demonstration of the effect of azimuthal ion deflection in the magnetic field. Deflection of a beam in the magnetic field of opposite polarity was shown. Theoretical dependences for values of an angle of azimuthal deviation obtained in the previous works were confirmed.

The working characteristics of the ion source with azimuth electron drift “IS-200” was investigated. It was shown that the ion source has two discharge modes: thruster mode and magnetron mode. The thruster mode is characterized with high voltage and high current efficiency with low discharge current. The increased ion current with low voltage and ion current efficiency are in magnetron mode. The thruster mode is more preferable for ion-beam processing. The optimal parameters of the ion source functioning was determined by the current-voltage characteristics.