Druckmessungen mit piezoelektrischen Sonden an einem linearen Z-Pinch

Abstract

The radial distribution of the dynamic and kinetic pressure in a linear Z-pinch-discharge has been investigated with piezoelectric probes. The electrical signals from the probe are proportional to the momentum flux on the pressure-sensitive surface. The momentum flux is anisotropic, because there are radial plasma streams during the compression and expansion of the plasma cylinder. The dynamic and kinetic pressure were determined from the momentum flux by comparing the probe measurements made in different directions. The conditions and construction of the probe necessary for both a good time resolution and high sensitivity are described. The probes have time resolutions and sensitivities of 0.6 μs and 7.7 Torr/mV and 0.8 μs and 2.0 Torr/mV respectively.