The microbicidal effect of electrical discharges on microorganisms suspended in the discharge liquid was reduced when the liquid contained high concentrations of inorganic salts (conductivity k >/= 5 mmho/cm). A higher discharge voltage and a smaller distance between the submerged electrodes counteracted this reduction. The decrease in the microbicidal effect was accompanied by a change in the ...

The numerical simulation of the development a streamer discharge in gap with an external longitudinal magnetic field was used to demonstrate self-focusing such discharges. Self-focusing is caused by sharp deceleration radial ionization wave due change electron energy distribution function, decrease average energy, rate gas ionization, and mobility crossed electric fields as compared case withou...

This paper provides an overview of modern research on magnetoplasma methods influencing gas-dynamic and plasma flows. The main physical mechanisms that control the interaction discharges with gaseous moving media are indicated. ways organizing pulsed energy input, characteristic aerodynamics, briefly described: linearly stabilized discharge, compressor, capillary laser-microwave action, electro...

[1] In the present paper, we demonstrate that the exponential expansion of streamers propagating in fields higher than the critical fields for stable propagation of streamers of a given polarity leads to the exponential growth of electric potential differences in streamer heads. These electric potential differences are directly related to the energy that thermal runaway electrons can gain once ...

Electric thrusters are usually in one of two forms: gridded ion thrusters or Hall thrusters. Each of these accelerates ions and requires an injector of electrons to neutralize the ion beam. Ambipolar thrusters eject neutralized plasmas with equal numbers of ions and electrons. Helicon thrusters are a new type being developed which utilize both the high ionization efficiency of magnetized helico...

The most common cause of high voltage electric machine malfunction is an electrical failure of the insulation system due to extreme partial discharges activity. The paper discusses the methodology for the construction of a low-pass high voltage filter for partial discharge measurement. It focuses mainly on the shape optimization, using an analytical approach with subsequent verification using t...

The fundamental higher-order Landau plasma modes are known to be generally heavily damped. We show that these modes for the ion component in a weakly ionized plasma can be substantially modified by ion-neutral collisions and a dc electric field driving ion flow so that some of them can become unstable. This instability is expected to naturally occur in presheaths of gas discharges at sufficient...

High-pressure micro-discharges are promising sources of light, ions, and radicals and offer some advantages in materials processing applications as compared to other more conventional discharges. We review here results from etching experiments using stencil masks where the discharge is formed only in the pattern cutout. The mask consists of a thin metal-dielectric structure and is pressed again...

Capacitor electrical discharge consolidation (CEDC) is a technique that uses the heat of Joule effect high intensity electric current to consolidate powders. In this study, precompaction pressure and number discharges on porosity, microstructure hardness compacts analysed. Furthermore, sintering results iron powders obtained through conventional route (cold pressing furnace sintering) by CEDC a...