%0 Journal Article
%T Near-wall conductivity effect under a space-charge-saturated sheath in the Hall thruster<br>
%A Zhang Feng-Kui
%A Ding Yong-Jie
%A Qing Shao-Wei
%A Wu Xian-De
%A <br>
%J 中国物理 B
%D 2011
%I 
%X In this paper, we adopt the modified Morozov secondary electron emission model to investigate the influence of the characteristic of a space-charge-saturated sheath near the insulated wall of the Hall thruster on the near-wall conductivity, by the method of two-dimensional (2D) particle simulation (2D+3V). The results show that due to the sharp increase of collision frequency between the electrons and the wall under the space-charge-saturated sheath, the near-wall transport current under this sheath is remarkably higher than that under a classical sheath, and equals the near-wall transport current under a spatially oscillating sheath in order of magnitude. However, the transport currents under a space-charge-saturated sheath and a spatially oscillating sheath are different in mechanism, causing different current density distributions under the above two sheaths, and a great influence of channel width on the near-wall transport current under a space-charge-saturated sheath.
%K saturated sheath
%K conductivity
%K current<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=B8035D61C1BAF40FDD7DBE17A5CC30AD&yid=9377ED8094509821&vid=A04140E723CB732E&iid=59906B3B2830C2C5&sid=577AA77A4D6C2585&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=31