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An expression for loss-front velocity of magnetically insulated ion flow in a vacuum transmission line is developed. It agrees well with the results from particle-in-cell simulations at high voltage. Index Terms--Loss-front, magnetically insulated ion flow, particle-in-cell, simulation, transmission line.

The reattachment process is an essential part of the dynamics of thermal plasma flows. Simulations of the flow inside a direct-current arc plasma torch performed with a two-temperature model produce a reattachment process triggered by local flow instabilities and driven by local high electric fields and electron temperatures. These results indicate that an arc reattachment can occur not only due to a breakdown of the gas surrounding the plasma but also due to the macroscopic characteristics of the flow, and these emphasize the importance of nonlocal thermodynamic equilibrium-based models to properly describe arc dynamics. Index Terms--Arc reattachment, finite element method, non-equilibrium, plasma torch, thermal plasma.

Plasma jet device, which generates plasma in open space rather than in a confined electrode gap only, attracts lots of attention recently. The generation of a plasma jet could be a gas flow phenomenon, an electrical phenomenon, or both. In this paper, the effect of electric field on the length of a special designed plasma jet is investigated. The plasma jet is driven by a pulsed direct current (DC) power supply. Simulation of the electric potential along the plasma jet shows that the electric potential difference along the 4 cm plasma jet is about 400 volts for applied voltage of 4 kV. This is consistent with the measured electric potential along the plasma jet. Besides, the experiment results also show that the length of the plasma jet reaches its maximum when the pulse width is about 1 [micro]s. According to the measured current-voltage curves, it could be concluded that the effect of pulse width on the length of the plasma jet is solely due to the electric field effect. Index Terms--Atmospheric pressure plasma, dielectric barrier disharge, non-equilibrium plasma, plasma jet, pulsed DC voltage.

In this paper, stable atmospheric dc glow microplasmas generated along two intersecting miniature gas flows through nozzle electrodes are observed. The intersecting angle was varied from 45[degrees] to 135[degrees]. If argon gas flow was used, striation structure can be noticed at the cathode side. Index Terms--Atmospheric glow discharge, intersecting miniature gas flows, microplasma-jets, striation stricture.