[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

[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

[en] The experimental equipment and the results of measuring the level of turbulence behind the electrostatic shock wave front are described. The turbulence level has been measured by the broadening of a test cesium ion beam. The peculiarity of this equipment is the usage of a thermo-ionic source of ions and of a beam detector based on a microchannel plate, which made it possible to achieve high sensitivity. At mean parameters of the system (the source current is 10^-9 A) a beam with the 1 μs duration is confidently photometrized. The above sytem has been used for determining the oscillation energy density in the experiments on studying the turbulent shock wave created when plasma flux interacting with a space-localized magnetic field - magnetic barrier

[en] Structure of a pinhole chamber for the range of soft X-ray radiation (0.2-10 keV quantum energy). With a register on the basis of a microchannel plate (MCP) is described and its basic characteristics are given. Spatial resolution of the register is 20 stroke/mm. An amplification factor of brightness, a moment of switching on, exposure duration are given with the MCP supply pulse. Device capabilities have been demonstrated in experiments with a neutral turbulent layer. Electron current in plasma of 0.3 Vsub(Te) current velocity (Vsub(Te)-electron velosity) has been recorded by means of the analysis of an image produced during the bombardment of a special target placed in plasma with electrons. Plasma density is n>=10¹² cm^-3, Te>=0.2 keV, exposure duration is 200 ns

No abstract available

[en] A pinhole camera for the soft-x-ray range (0.2--10 keV) with a microchannel-plate detector has been developed. The construction and basic characteristics of this camera are reported. The spatial resolution of the detector is 20 lines/mm. The brightness intensification, the trigger time, and the duration of the exposure are all set by a pulse from the power supply for the microchannel plate. The capabilities of the camera are demonstrated in experiments with a turbulent neutral current sheet. Analysis of an image produced by electron bombardment of a special target in the plasma reveals an electron current in the plasma with a current velocity of 0.3v_Te. The plasma density is n> or =10¹² cm^-3, the electron temperature is T_e> or =0.2 keV, and the exposure time is 200 ns