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3140 IEEE TRANSACTIONS ON PLASMA SCIENCE, VOL. 42, NO. 10, OCTOBER 2014
Fig. 2. Left: contours of the azimuthal velocity vθ at 50, 100, and 150 μs. Right: line-outs of azimuthal velocity vθ versus r at the midplane z = 0.
radially and axially until 80 μs. An electron current develops, due to ion-electron collisions, that neutralizes some of the ion current. However, the ion current remains dominant and maintains the field reversal. The magnetic pressure is larger
outside the plasma, than inside, after 20 μs, due to the centrifugal force caused by plasma rotation.
The amplitude and shape of the normalized, total-plasma pressure, P = Pi + Pe and the normalized, axial-magnetic