%0 Journal Article
%T Numerical simulation of space charge packet behavior in low-density polyethylene under direct current voltage<br>聚乙烯空间电荷包行为的形成机理与仿真方法研究
%A Xia Jun-Feng
%A Zhang Ye-Wen
%A Zheng Fei-Hu
%A Lei Qing-Quan
%A <br>夏俊峰
%A 张冶文
%A 郑飞虎
%A 雷清泉
%J 物理学报
%D 2009
%I 
%X Packet-like space charge behavior is a kind of special transport behavior of space charge in polyethylene. It has been demonstrated that many factors, such as the intensity of applied field, temperature and material have great influence on the formation and migration of space charge packets. This would cause much difficulty in understaning the general mechanism of the phenomenon. In this paper, on the basis of analysis of charge injection and migration, the interaction between the charge and charge trap and the influence of electric field on charge trap level, a model is proposed to simulate the packet-like space charge behavior. We suppose thar there exists a negative differential relationship for the charge velocity against the electric field when the electric ficld exceeds a threshold value. By considering the negative differential relationship, we simulated various kinds of packet-like charge behaviors and the results of numerical simulation show a good agreement with the experimental results issued by different research groups.
%K packet-like space charge
%K numerical simulation
%K negative differential mobility<br>空间电荷包，
%K 数值模拟，
%K 负微分迁移率
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=09B8E0E3969DFE12F62E2C78612B6B92&yid=DE12191FBD62783C&vid=9FFCC7AF50CAEBF7&iid=59906B3B2830C2C5&sid=A086DCD5DBB6F544&eid=46E670495B5B787E&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=0