Abstract
High-voltage equipment needs to withstand various environments. It is well known that charged body between electrodes affects insulation performance. In the worst case, the charged body caused electrical breakdown. Therefore, it is necessary to study discharge mechanism in case that the charged body exists between the electrodes. To study it, we need the technique which control the charge amount of the charged body. In this work, we fixed a millimeter-sized particle between electrodes. In addition, high voltage was applied to the electrodes, and quasi-uniform field was produced. Then, we irradiated position of 2 mm above or below the metallic particle with YAG-Laser to control the charge amount of it. Consequently, the charge amount and polarity of a metallic particle can be controlled by laser.
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