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Drift-Wave Instability Modified by Superimposed Parallel and Perpendicular Plasma Flow Velocity Shears

T. Kaneko, K. Hayashi, R. Ichiki, R. Hatakeyama (18R15)

Fusion Science and Technology / Volume 51 / Number 2T / February 2007 / Pages 103-105

Technical Paper / Open Magnetic Systems for Plasma Confinement

Parallel and perpendicular plasma flow velocity shears are independently controlled and superimposed in magnetized plasmas using a modified plasma-synthesis method with concentrically three-segmented electron and ion emitters. The parallel flow velocity shear is observed to destabilize the electron drift-wave instability depending on the shear strength, while the perpendicular flow velocity shear superimposed on the parallel flow velocity shear is demonstrated to suppress the instability even in the presence of the parallel flow velocity shear.

 
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