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Numerical simulation of charge packet behavior in low-density polyethylene based on Gunn effect-like model

Lei Qing-Quan Xia Jun-Feng Zhang Ye-Wen Zheng Fei-Hu

Numerical simulation of charge packet behavior in low-density polyethylene based on Gunn effect-like model

Lei Qing-Quan, Xia Jun-Feng, Zhang Ye-Wen, Zheng Fei-Hu
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  • PDF Downloads:  955
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  • Received Date:  27 April 2009
  • Accepted Date:  19 May 2009
  • Published Online:  15 January 2010

Numerical simulation of charge packet behavior in low-density polyethylene based on Gunn effect-like model

  • 1. (1)哈尔滨理工大学,哈尔滨 150080; (2)同济大学波尔固体物理研究所,上海 200092

Abstract: Packet-like space charge behavior usually induces the electric field distortion and strongly affects the electrical performance of low-density polyethylene. In this paper, we analyze the influence of charge injection, carriers migration and interaction between the free charge and trap in polyethylene on packet-like space charge behavior and introduce the mechanism of Gunn effect to describe the generating process of space charge packet. Based on this, we simulated two kinds of packet-like space charge behaviors with different variation trends and in different applied fields reported by different research groups. The simulated space charge packet shows very good fitting with the experiment data in both packet amplitude and migration velocity. The simulation results also indicate that the injection conditions and trap level depth play an important role in the diversity of packet-like space charge behavior.

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