Investigation of a 1-D Fluid Probe Model for Mach Probe Measurements

Details Investigation of a 1-D Fluid Probe Model for Mach Probe Measurements Investigation of a 1-D Fluid Probe Model for Mach Probe Measurements

2004-10-22

arxiv.org/abs/physics/0410217v2

Physics

Plasma Physics

12th International Congress on Plasma Physics, 25-29 October 2004, Nice (France)

Scientific paper

10.1007/s10582-005-0049-3

In this paper we show how a two dimensional fluid model can be used to interpret data obtained from an inclined Mach-probe or a Gundestrup probe. We use an analytical approximation of the solution of the differential equations describing the relation between the plasma flow and the measured ion saturation currents at the probe's surface. The parameters of this analytical solution are determined by comparison with the exact numerical solution of the equations. In this way we are able to measure the parallel as well as the perpendicular Mach numbers over the whole parameter range with a minimum accuracy of 90%.

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