Abstract
Department of Nuclear Engineering, Seoul National University, Seoul 151-724, Korea(Received January 3, 2011; Revised February 3, 2011; Accepted May 5, 2011)Abstract: The conducting current of non-uniform plasma immersed electrode consists of ion current and secondary electron emission current caused by the impinging ion current. The ion current is determined by the ion dose passing through the sheath in front of electrode and the ion distribution in front of the electrode plays an important role in the secondary electron emission. The investigation of the distributed plasma and secondary electron effect on electrode ion current was carried out as the stainless steel electrode plugged with quartz tube was immersed in the inductively coupled Ar plasma using the antenna powered by 1 kw and the density profile was measured. After that, the negative voltage was applied by 1 kV∼6 kV to measure the conduction current for the analysis of ion current. Keywords: Secondary electron emission coefficient, Conducting current, Ion current density, Plasma density distribution, Non-uniform plasma
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