[en] The design of the octa-channel energy analyser of charge-exchange neutral particles is described. The energy analyzer consists of a gas stripping chamber and an electrostatic energy ion analyzer made on the base of a flat capacitor with the analyzing particle entry angle of THETA=45 deg. The analyzer has time resolution of approximately 10 ns at Δ E/E approximatelypproximately 10% energy resolution. The time resolution is reached by decreasing the size of the stripping chamber and ion analyzer. The use of flexible fibre light guides, performing the transfer of light signal from the scintillators to photo-electric multipliers, has made it possible to decrease the size of secondary-emission detectors and distance between them. The time evolution of the energy spectrum of plasma ions, compressed by the magnetic piston in a quick teta-pinch, is given. Using energy analyzers with high time resolution gives important additional information on the plasma ion component dynamics in pulse process investigation of the small duration

[en] It is shown that the process of ion acceleration in the plasma jet of a vacuum arc can be explained by entrainment of ions by the electron flux moving from the cathode toward the anode. The frictional force has a turbulent nature, due to the buildup of ion-acoustic turbulence by the current. A similar mechanism may also occur in a current-carrying plasma jet generated in the polar region of the magnetosphere, resulting in the observed energies of accelerated O⁺ ions

No abstract available

[en] Role of resistive mechanism (turbulent nature) in ion acceleration processes at expansion of plasma jet with current in vacuum is considered on the basis of laboratory experiment results and of measurement analysis in the near-earth plasma, as well. It is shown, that ion acceleration in vacuum arc plasma jet may be explained by their carrying away with electron flow moving from cathode to anode, and friction force is of turbulent character resulted from ion-sound turbulence building-up by current. Similar mechanism may realize in current-carrying plasma jet generated in magnetosphere polar range resulting in the observed values of O⁺ accelerated ion energy