Experimental investigation on the instability of the positive column in oxygen (poster)

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Authors

TESTRICH Holger WILKE Christian REIMER Rene WAGNER Hans-Erich NAVRÁTIL Zdeněk

Year of publication 2007
Type Article in Proceedings
Conference Proceedings of ICPIG XXVIII
MU Faculty or unit

Faculty of Science

Citation
Field Plasma physics
Keywords neon RF discharge; optical emission spectroscopy; collisional-radiative model
Description In the contribution for the first time is started the common investigation on the instability ranges of the oxygen positive column and its correlation with the density of O- ions. The ranges of the discharge stability / instability have been recorded by a linear photo diode array. The O- ion densities were measured by selective laser photo detachment in combination with the probe diagnostics. The measurements were realized in the d.c. positive column (tube diameter: 50 mm, electrode distance: 600 mm, pressure range: 0.3 Torr to 0.7 Torr, current range: 1 mA to 50 mA). The electric field strength in the H- and T- mode of the column as well as the density and energy of electrons have been estimated, too.
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