Abstract： We investigate the sheath structure of an electronegative plasma at steady state with the assumptions of cold positive ions and hot negative ions. The modified Bohm criterion is obtained with the Sagdeev potential by introducing a modified ion sound velocity. At the same time the electric potential, net space charge and particles densities in the sheath are analysed in several cases of different temperature ratios of electrons to negative ions and different density ratios of negative ions to positive ions.
WANG Zheng-Xiong;LIU Jin-Yuan; ZOU Xiu;LIU Yue; WANG Xiao-Gang. Sheath Structure of an Electronegative Plasma[J]. 中国物理快报, 2003, 20(9): 1537-1539.
WANG Zheng-Xiong, LIU Jin-Yuan, ZOU Xiu, LIU Yue, WANG Xiao-Gang. Sheath Structure of an Electronegative Plasma. Chin. Phys. Lett., 2003, 20(9): 1537-1539.
2003, Vol. 20 
