High Speed Argon PlasmaJet Merging Studies in Support of PLX

Formation of an imploding plasma liner such as for the Plasma Liner Experiment (PLX) requires individual plasma jets to merge into a uniform shell of plasma converging on the target region. Understanding dynamics of the merging process requires knowledge of the plasma phenomena involved. We present here results from the study of the merging of six plasma jets in three dimensional geometry. The experiments were performed using HyperV Technologies Corp. one centimeter MiniRailguns using a preionized Argon plasma armature on a vacuum chamber designed to partially reproduce the port geometry of the PLX vacuum chamber. Diagnostics include fast imaging, spectroscopy, B-dot probes, and high speed spatially resolved photodiodes, permitting measurements of temperature, velocity, and magnetic field. These experimental results are compared with simulation results from the LSP 3D hybrid PIC code.\footnote{Work supported by the US DOE OFES under grants DE-FG02-05ER54810 and DE-FG02-08ER85114.}