| 摘要 |
Apparatus for charging an insulating layer comprising an ion source for simultaneously producing a corona discharge of positive and negative ions and an acceleration electrode for extracting negative ions to uniformly charge the insulating layer. The ion source comprises at least one main electrode, an auxiliary electrode and a counter electrode coaxial to the main and auxiliary electrodes, and the accelerating electrode is arranged at the remote side of the layer to be charged. The apparatus further comprises deflecting electrodes and a plate electrode further acting upon the distribution of charge across the insulating layer.
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