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P: Plasmaphysik
P 9: Dense Plasmas and Plasma Diagnostic (Poster Session)
P 9.2: Poster
Tuesday, April 3, 2001, 12:30–15:00, AT2
Electrical conductivity measurements of strongly coupled Ti-plasmas — •Swilem Saleem and Hans-Joachim Kunze — Institute For Experimental Physics V, Ruhr-University Bochum, Germany
Nonideal plasmas of titanium were produced by vaporizing thin wires of 0.25 mm diameter in small glass capillaries (in air) by means of a short-pulse current from an electrical discharge. For a short period of time, the inner wall of the rigid glass capillary confined the plasma until the induced pressure shock wave disintegrated the capillary. Spectroscopic measurements were carried out on the ejected plasma close to the end of the capillary. The plasma temperature was obtained by fitting a Planck curve to the measured continuum spectrum. The resistance was derived from the discharge parameters. The plasma radius was determined with a streak camera and allowed the derivation of the conductivity. Particle densities were of the order of 1022 particle/cm3 and electron temperatures around 20 kK.
These measurements are compared with previous measurements of tungsten of our works at the same experimental conditions.