On the stability of a dc-driven oxygen discharge in cylindrical geometry

Bruhn, B.; Richter, A.; May, B.
May 2008
Physics of Plasmas;May2008, Vol. 15 Issue 5, p053505
Academic Journal
Starting from the hydrodynamic equations describing the positive column of glow discharges in oxygen, the stability of the homogeneous state is investigated. The model contains electrons, positive and negative ions as well as the metastable molecule O2(a1Δg) as a detachment partner. It is shown that the transition from the H-mode to the T-mode of a dc-driven oxygen discharge is caused by an attachment-induced ionization instability. The stability boundaries are calculated for selected values of the plasma parameters. The comparison of experimental data and theoretical predictions shows satisfactory agreement.


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