Heidelberg 1999 – scientific programme

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P: Plasmaphysik

P 25: Dichte Plasmen (Poster)

P 25.7: Poster

Tuesday, March 16, 1999, 16:30–19:00, PY

Electrical Conductivity measurements of Strongly Coupled
W-Plasmas — •S. Saleem, J. Haun, and H.-J. Kunze — Institut für Experimentalphysik V, Ruhr-Universität Bochum, D-44780 Bochum

Nonideal plasmas of tungsten were produced by vaporizing thin wires in small glass capillaries 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 spectrum. The resistance was derived from the discharge parameters. The plasma radius was determined with an ICCD-Camera and allowed the derivation of the conductivity. The particle density was of the order of 10²² cm⁻³ and the electron temperature was in the range from 8000 to 25000 K. The experimental conductivities are discussed.