Clarifications and Applications of Some Singular Dynamic Phenomena in Gas Discharge Field

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Some kinds of singular dynamic phenomena observed in gas discharge field were investigated. These are electrostatic Moses effect, corona jet phenomenon, and electrostatic water jet phenomenon.1. Electrostatic Moses effect : Over a threshold voltage, corona discharge took place in a pin-to-plate electrode system and a relatively large repulsive force, in the order of 100 чN, was induced due to the ionic wind. It depressed water and a large depression of water, in the order of several 100чm at the center, was observed even to the naked eye. This phenomenon was utilized for a driving force of a micro-machine.2. Corona Jet Phenomenon : Lateral whirling of the pin electrode was observed at corona discharging when the pin electrode was extremely fine. Whirling frequency was increased with the increase of the applied voltage. Axial repulsive force due to the ionic wind was the cause of the whirling.3. Water Jet Phenomenon : When high voltage was applied between an insulative capillary tube filled with water and a metal plate electrode, water jet phenomenon was observed. This is expected to be utilized for a new inkjet printhead.New mechanism of electrostatic paper-separation and paper-feed systems was also proposed to realize highly a reliable paper handling system for printers.