Axial emission profiles and apparent secondary electron yield in abnormal glow discharges in argon
Institute of Physics, P.O.B. 68, 11080 Zemun, Belgrade,
2 Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, P.O.B. 49, 1525 Budapest, Hungary
Corresponding author: a email@example.com
Published online: 24 September 2002
This paper reports investigations of argon glow discharges established between flat disk electrodes, at pressure × electrode separation values between 45 and 150 . Parallel to the experimental studies the discharge is also described by a self-consistent hybrid model. The model uses as input data the measured electrical characteristics, this way making it possible to determine the apparent secondary electron emission coefficient. The model is verified through comparison of the measured and calculated spatial profiles of light emission, which are in good agreement for a wide range of conditions in the abnormal glow mode. Additionally, we investigate the dependence of the field reversal position on the discharge conditions and test the usual assumption that the position of the peak of emission closely coincides with the cathode fall – negative glow boundary.
PACS: 51.50.+v – Electrical properties (ionization, breakdown, electron and ion mobility, etc.) / 52.65.-y – Plasma simulation / 52.80.Hc – Glow; corona
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002