Abstract Among the applied challenges associated with use of electric-arc plasma, most urgent is erosion electrodes in plasmatrons, which determine continuous operation an electric-plasma device. Investigation results on thermal state hot cathodes and their are presented depending main defining parameters, namely geometrical dimensions electrodes, Joule heating, current arc discharge, gas mediu...

We have designed, fabricated and characterized an ion source based on a vacuum magnetron discharge. The discharge is initiated by arc discharge, the plasma of which flows onto sputtering target working surface. material usually same as that target. discharges operate at residual pressure 3 × 10−6 Torr without gas feed. Pulses (30 μs) (up to 300 are applied simultaneously. After ignition arc, ru...

This article reviews the development of electrostatic apparatuses for controlling insect pests in greenhouses. The control insects by repelling them, capturing and killing them producing an arc discharge. single-charged dipolar electric field screen (SD screen) repels due to insects’ inherent avoidance behavior toward entering produced. As this is common many pests, SD effectively prevents from...

New metal–carbon clusters, M4C9 + (M = Ti, V), generated using a combined thermal arc discharge evaporation set-up, have been studied with quadrupole mass spectrometry. Reactivities of these clusters have been investigated by means of association reactions with H2O. Metal–carbon clusters of other compositions have also been studied. We speculate on the mechanism of formation of larger metal–car...

Vacuum arc ion sources, commonly also known as "Mevva" ion sources, are used to generate intense pulsed metal ion beams. It is known that the mean charge state of the ion beam lies between 1 and 4, depending on cathode material, arc current, arc pulse duration, presence or absence of magnetic field at the cathode, as well as background gas pressure. A characteristic of the vacuum arc ion beam i...

The conventional wisdom about solar array arcing in LEO is that only the parts of the solar array that are swept over by the arc-generated plasma front are discharged in the initial arc. This limits the amount of energy that can be discharged. Recent work done at the NASA Glenn Research Center has shown that this idea is mistaken. In fact, the capacitance of the entire solar array may be discha...

We present in this paper a MHD modelling of the gliding arc behaviour of a DC plasma torch operating with air under low current and high voltage conditions. The low current leads to instabilities and difficulties to simulate the process because the magnetic field is not sufficient to constrict the arc. The model is 3D, time-dependent and the MHD equations are solved in using CFD software Code_S...

Plasma generation over large areas using a hollow cathode discharge is described in this study. Radio frequency linear hollow cathodes in several arrangements, for operation at reduced gas pressure and suitable for scale-up, are presented. Examples of surface processing and coating by PVD, both by hollow cathode discharge (HCD) and hollow cathode arc (HCA), are given. A non-equilibrium atmosphe...

SiCp/Al composites are difficult-to-cut materials. In recent years, electrical arc discharge machining has been developed to improve the machinability of these However, there is a big challenge build satisfactory heat transfer model in machining. This not only because material property difference between reinforcement and matrix but also micro-dimension SiC reinforcements. paper established new...