Studies on Surface Charge Distribution and Charging Mechanism on an Insulating Spacer in Vacuum

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  • 真空中絶縁スペーサの帯電分布と帯電メカニズムの検討
  • シンクウ チュウ ゼツエン スペーサ ノ タイデン ブンプ ト タイデン メカニズム ノ ケントウ

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Analytical and experimental investigations have been carried out to clarify the charging mechanism on the surface of an insulating spacer in vacuum. A cylindrical insulator made of PMMA, PTFE, Polyimide, or Al2O3 has been examined. The distributions of charges measured by means of an electrostatic probe have been compared with results predicted from a charge-simulation technique for equilibrium conditions, based on a secondary electron emission process. For equilibrium conditions fairly good agreement has been established between measured and calculated. data except for positions on the insulator surface close to the cathode.

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