電子線照射された人工衛星表面材料上での帯電と放電のパラメータ

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  • Parameters of Electrostatic Charging and Discharge on Surface Materials for Spacecraft Irradiated by Electron Beam
  • デンシセン ショウシャサレタ ジンコウ エイセイ ヒョウメン ザイリョウジョウ

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On the surfaces of polymer films used for thermal control materials of spacecrafts, the electrostatic charging and discharge occasionally occur in space environment. The final potential of charging depends on the materiais. To investigate this dependency, the experiment of electron beam irradiation on two kinds of materials using a high vacuum chamber and the calculation using a one dimensional model are compared. The result is that the final potential is dependent especially on the secondary electron emission and the backscatter coefficient of the material rather than its resistivity. The relationship between the resistivity of materials and the surface potential is also shown.<br>The breakdown voltage on the surface of polymer films using electrodes are also measured. The result shows that it is necessary to take the effect of the surface charging and the irradiation of electron beam into consideration to estimate the charging potential.

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