ガス中絶縁破壊試験を対象としたγ線照射による初期電子供給効果に関する検討

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タイトル別名
  • Effect of Initial-electron Supply by γ-ray Irradiation for Breakdown Characteristics of an Insulation Gas
  • ガス チュウゼツエン ハカイ シケン オ タイショウ ト シタ ガンマセン ショウシャ ニ ヨル ショキ デンシ キョウキュウ コウカ ニ カンスル ケントウ
  • Effect of Initial-electron Supply by γ-ray Irradiation for Breakdown Characteristics of an Insulation Gas

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In the measurement of discharge characteristics of a gas in a controlled condition, such as under pressure, the electrodes are set up in a pressure vessel. This often makes a deficiency of initial electrons between gaps, resulting in increase of statistical time lag and dispersion of discharge voltage. We apply irradiation of UV light ore radial rays with a radioactive isotope as an artificial method of supplying initial electrons. In UV light irradiation, initial electrons are emitted from the electrode surface by photoelectric effect, which is irrelevant to the kind of a gas under study. The radial ray irradiation, on the other hand, generate electrons by ionizing gas molecules (Compton effect), which makes it important to understand the effect of the gas on the generation of initial electrons. In this paper, the ionization current of SF6, CO2 and N2 was measured using 60Co as a radioactive source. The charged particle production rate was estimated from this result. Moreover, the number of the charged particle which can become an initial electron is described.

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