Because of their ability to achieve enhanced plasma chemistry at low temperatures, pulsed plasmas are very attractive in applications that require a rich chemical environment, such as combustion. Here, we report on a cold plasma jet launched by a pulsed plasma device (the Plasma Pencil). The plasma pencil can generate relatively long plasma plumes at atmospheric pressure [1-2]. It exhibits plasma controllability and stability, room temperature and atmospheric pressure operation, as well as low power consumption. These are desirable features of a plasma source that can be used reliably in material processing, including biomedical applications. In this work, we present the correlation between current-voltage characteristics and fast photography of the plasma plume that is in fact a small bullet - like volume of plasma traveling at unusually high velocities. A mechanism of the plasma bullet traveling under very low electric field conditions will be discussed. This is based on a streamer model where photoionization plays an important role to explain the plume dynamical behavior.
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