電子線照射された高分子フイルム上の沿面放電現象の観察

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タイトル別名
  • Observation of Surface Discharge on Polymer Films Irradiated by Electron Beam
  • 電子線照射された高分子フィルム上の沿面放電現象の観察
  • デンシセン ショウシャサレタ コウブンシ フィルムジョウ ノ エンメン ホウデ

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説明

The surface discharge on dielectric surfaces of a spacecraft caused by spacecraft charging is simulated by using a high vacuum chamber equipped with an electron beam gun. Fluoroethylenepropylene (FEP) and polyethyleneterephthalate (PET) films frequently employed as thermal control materials are irradiated by an electron beam until surface discharges occur, then the spectrum and waveform of emitted light of discharge, together with the current waveform of the discharge and the mass spectrum of the gas in the vacuum chamber are measured.<br>In the range of 300 through 700nm of the wavelength, light emission from CN radicals, C2 radicals, CH radicals and hydrogen atoms are detected. From this result, it is suggested that water molecules in the residual gas and molecules in the structure of the specimen contribute the light emission. The spectroscopic observation of the light emission suggests that the discharge energy is concentrated on PET more than that on FEP.

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