Radial foil experiments on cobra with imposed external B-field

摘要

Previous investigations of exploding radial foils have shown the formation of an axial plasma jet with velocities ∼100km/s in the early stages of the foil explosion. In this case a thin load foil is pressed at an outer annulus held at ground, and contacted in the center by a small straight pin cathode (∼1mm in diameter) driven by the IMA COBRA accelerator. The field near the jet was measured using miniature B-dot probes at 3T. Present experiments focus on the jet development when an externally produced static B-field is applied. Configurations of interest include: B-field in parallel with the jet direction, and B-field applied in the direction transverse to the jet.