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Keywords:

  • pressure wave method;
  • charge distribution;
  • electron beam;
  • dielectric materials;
  • spacecraft

Abstract

Charge accumulations in electron-beam (e-beam)-irradiated polymers are investigated by observing them using the pressure wave propagation method. The purpose of our research work is to measure the charge distribution in e-beam-irradiated dielectric materials for spacecrafts. We have been developing a system for measuring such a charge distribution in dielectric materials. Using this system, we tried to measure the charge distribution in various typical polymers (poly(ethylene terephthalate), polystyrene, low-density polyethylene) under e-beam irradiation. As a result, it is found that charging characteristics of insulating material is strongly influenced by the existence of benzene ring in the molecular architecture. Copyright © 2010 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.