Anodic arc discharge supported by the erosion of the anode material is one of the most practical and efficient methods to synthesize various high-quality carbon nanostructures including nanotubes, graphene due to its relatively higher growth temperature and eco-friendly procedures. In order to increase the arc controllability of the as-synthesized products, we introduced a non-uniform magnetic ...

The present modeling deals with the physical description of the high-current (>15 kA) constricted vacuum arc, driven by a transverse magnetic field (TMF), as found in vacuum circuit breakers applying TMF arc control. The MHD approach together with detailed heat transfer and evaporation equations for the electrodes are used to describe the arc behavior self-consistently, restricting to two dimen...

An apparatus and method are disclosed whereby if the arc in a DC or long-pulse AC vacuum arc plasma process (eg in vacuum deposition) starts to extinguish, this is automatically detected and a reignition process is activated. Detection of a tendency for the arc to extinguish is detected by monitoring the main power supply voltage, which will increase if the arc is extinguished. References Cited...

Arc jets are unique facilities used to evaluate the performance of Thermal Protection Systems (TPS) for hypersonic vehicles. They produce high pressure and enthalpy plasma flow simulate extreme heat encountered during atmospheric entry. The constricted arc heater part an jet increases test gas temperature by Joule heating. This study details development three-dimensional unsteady analysis tool,...